霍尔传感器ES249中文手册

Data Sheet 27621.6A*Always order by complete part number, e.g., A3141ELT .These Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate continuously over extended temperatures to +150°C, and are more stable with both temperature and supply voltage changes. The unipolar switchingcharacteristic makes these devices ideal for use with a simple bar or rod magnet. The four basic devices (3141, 3142, 3143, and 3144) are identical except for magnetic switch points.Each device includes a voltage regulator for operation with supply voltages of 4.5 to 24 volts, reverse battery protection diode, quadratic Hall-voltage generator, temperature compensation circuitry, small-signal amplifier, Schmitt trigger, and an open-collector output to sink up to 25 mA. With suitable output pull up, they can be used with bipolar or CMOS logic circuits. The A3141– and A3142– are im-proved replacements for the UGN/UGS3140–; the A3144– is the improved replacement for the UGN/UGS3120–.The first character of the part number suffix determines the deviceoperating temperature range. Suffix ‘E–’ is for the automotive and industrial temperature range of -40°C to +85°C. Suffix ‘L–’ is for the automotive and military temperature range of -40°C to +150°C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT-89/TO-243AA transis-tor package for surface-mount applications; suffix ‘–U’ is a three-lead plastic mini-SIP, while suffix ‘–UA’ is a three-lead ultra-mini-SIP.FEATURES and BENEFITSs Superior Temp. Stability for Automotive or Industrial Applications s 4.5 V to 24 V Operation … Needs Only An Unregulated Supply s Open-Collector 25 mA Output … Compatible with Digital Logic s Reverse Battery Protections Activate with Small, Commercially Available Permanent Magnets s Solid-State Reliability s Small Sizes Resistant to Physical StressSENSITIVE HALL-EFFECT SWITCHES FOR HIGH-TEMPERATURE OPERATION3141 THRU 3144The A3141xU, A3142xU, A3143xU,and A3144xU are not for new design.3141 THRU 3144SENSITIVEHALL-EFFECT SWITCHESFOR HIGH-TEMP. OPERATION115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-5000MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.NOTES:Typical values are at T A = +25°C and V CC = 8 V.B OP = operate point (output turns ON); B RP = release point (output turns OFF); B hys = hysteresis (B OP - B RP ).*Complete part number includes a suffix to identify operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).ELECTRICAL CHARACTERISTICS at V CC = 8 V over operating temperature range.LimitsCharacteristic Symbol Test ConditionsMin.Typ.Max.Units Supply VoltageV CC Operating 4.524V Output Saturation Voltage V OUT(SAT)I OUT = 20 mA, B > B OP 175400mV Output Leakage Current I OFF V OUT = 24 V, B < B RP <1.010µA Supply Current I CC B < B RP (Output OFF) 4.49.0mA Output Rise Time t r R L = 820 Ω, C L = 20 pF 0.04 2.0µs Output Fall Timet fR L = 820 Ω, C L = 20 pF0.18 2.0µsPart Numbers*A3141–A3142– A3143–A3144–Characteristic Min.Typ.Max.Min.Typ.Max.Min.Typ.Max.Min.Typ.Max.B OP at T A = 25°C5010016013018023022028034070350over operating temp. range 3010017511518024520528035535450B RP at T A = 25°C10451307512517516522528550330over operating temp. range 10451456012519015022530025430B hys at T A = 25°C2055803055803055802055over operating temp. range2055803055803055802055Copyright © 1993, 1999, Allegro MicroSystems, Inc.3141 THRU 3144SENSITIVEHALL-EFFECT SWITCHES FOR HIGH-TEMP . OPERATIONSUPPLY CURRENTSUPPLY CURRENT10152025SUPPLY VOLTAGE IN VOLTSDwg. GH-041-15S U P P L Y C U R R E N T I N m A255075AMBIENT TEMPERATURE IN °C-50Dwg. GH-039-1-25S U P P L Y C U R R E N T I N m ATYPICAL OPERATING CHARACTERISTICSA3142– SWITCH POINTSOUTPUT SATURATION VOLTAGE300AMBIENT TEMPERATURE IN °C200Dwg. GH-040-1S A T U R A T I O N V O L T A G E I N m V50100AMBIENT TEMPERATURE IN °C-50Dwg. GH-044S W I T C H P O I N T I N G A U S S3004002001001500-252575125* Complete part number includes a suffix denoting operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).3141 THRU 3144SENSITIVEHALL-EFFECT SWITCHESFOR HIGH-TEMP. OPERATION115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-5000TYPICAL OPERATING CHARACTERISTICS (cont.)CHANGE IN OPERATE POINT10152025SUPPLY VOLTAGE IN VOLTSDwg. GH-042-15C H A N G E I N O P E R A T E P O I N T I N G A U S S-5.05.0OPERATIONThe output of these devices (pin 3) switches low when the magnetic field at the Hall sensor exceeds the operate point threshold (B OP ). At this point, the output voltage is V OUT(SAT). When the magnetic field is reduced to below the release point threshold (B RP ), the device output goes high. The difference in the magnetic operate and release points is called the hysteresis (B hys ) of the device. This built-in hysteresis allows clean switching of the output even in the presence of external mechanical vibration and electrical noise.3141 THRU 3144SENSITIVE HALL-EFFECT SWITCHES FOR HIGH-TEMP. OPERATION PACKAGE DESIGNATOR ‘LT’(SOT-89/TO-243AA)Dimensions in Inches(for reference only)Dimensions in Millimeters(controlling dimensions)0.440.35NOTES:1.Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line).2.Exact body and lead configuration at vendor’s option within limits shown.3.Height does not include mold gate flash.3141 THRU 3144SENSITIVEHALL-EFFECT SWITCHESFOR HIGH-TEMP. OPERATION115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-5000°°NOTES:1.Tolerances on package height and width represent allowable mold offsets. Dimensions given are measuredat the widest point (parting line).2.Exact body and lead configuration at vendor’s option within limits shown.3.Height does not include mold gate flash.4.Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm).PACKAGE DESIGNATOR ‘U’Dimensions in Inches Dimensions in Millimeters (controlling dimensions)(for reference only)Devices in the ‘U’ package areNOT RECOMMENDED FOR NEW DESIGN3141 THRU 3144SENSITIVE HALL-EFFECT SWITCHES FOR HIGH-TEMP. OPERATION Dwg. MH-014E inBSC°NOTES:1.Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line).2.Exact body and lead configuration at vendor’s option within limits shown.3.Height does not include mold gate flash.Dwg. MH-014E mmBSC °PACKAGE DESIGNATOR ‘UA’Dimensions in Inches Dimensions in Millimeters (controlling dimensions)(for reference only)3141 THRU 3144SENSITIVEHALL-EFFECT SWITCHESFOR HIGH-TEMP. OPERATION115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-5000Allegro MicroSystems, Inc. reserves the right to make, from time to time,such departures from the detail specifications as may be required to permit improvements in the design of its products.The information included herein is believed to be accurate and reliable.However, Allegro MicroSystems, Inc. assumes no responsibility for its use;nor for any infringements of patents or other rights of third parties which may result from its use.。

1.描述ES582是单极霍尔效应传感器从混合信号IC制造CMOS技术。

设备集成了一个电压调节器,霍尔传感器动态补偿取消系统,施密特触发器和一个open-drain输出驱动程序,所有在一个包中。

它集成了先进的直升机稳定技术提供准确和稳定的磁开关点。

有很多申请这HED -霍尔电子设备除了那些下面列出。

由于其宽工作电压范围和扩展温度范围的选择,它非常适用于汽车,工业和消费者应用程序。

交付的设备是在一个小提纲晶体管(说)表面安装过程和在一个塑料单(- 92平)通孔。

3-lead 包都是通过无铅认证。

2.特性宽工作电压范围3.5 v和24 v介质的敏感性CMOS技术Chopper-stabilized放大级优良的温度稳定性极低的开关点漂移对身体压力低电流消耗明渠输出小SOT23 3 l和平板- 92 3 l,通过无铅认证包3.应用程序汽车、消费品和工业固态开关断续器速度检测线性位置检测角位置检测接近detectio4.原理框图5.术语表术语描述毫伏特斯拉(mT) 高斯,磁通密度单位:1吨= 10高斯 RoHS有害物质限制SOT 小轮廓晶体管(说包)——也被称为包代码” ESD 静电放电 BLDCBrush-Less 直流操作点(BOP)磁通密度应用于品牌的包将输出驱动程序(输出电压= VDSon)释放点(BRP)磁通密度应用于品牌的包挫伤了驱动程序的输出(输出电压=高)6.销的定义和描述SE 销UA 销.类型函数名称 1 1 V DD 输入 电源电压销 2 3 OUT 输出 输出销 32GND接地地面销VDDOUTV oltage Regulat o rChopperHall PlateGNDUA Package SO Package Pin 1 – V DDPin 1 – V DDPin 2 – GND P in 2 – OUT Pin 3 – OUT P in 3 – GND7.独特的特性基于混合信号CMOS技术,Innosen ES582霍尔设备与介质磁敏感性。

一、霍尔电流电压传感器、变送器的基本原理与使用方法1．霍尔器件霍尔器件是一种采用半导体材料制成的磁电转换器件。

如果在输入端通入控制电流IC ，当有一磁场B穿过该器件感磁面，则在输出端出现霍尔电势VH。

如图1－1所示。

霍尔电势VH 的大小与控制电流IC和磁通密度B的乘积成正比，即：VH＝KHICBsinΘ霍尔电流传感器是按照安培定律原理做成，即在载流导体周围产生一正比于该电流的磁场，而霍尔器件则用来测量这一磁场。

因此，使电流的非接触测量成为可能。

通过测量霍尔电势的大小间接测量载流导体电流的大小。

因此，电流传感器经过了电－磁－电的绝缘隔离转换。

2．霍尔直流检测原理如图1－2所示。

由于磁路与霍尔器件的输出具有良好的线性关系，因此霍尔器件输出的电压讯号U0可以间接反映出被测电流I1的大小，即：I1∝B1∝U我们把U0定标为当被测电流I1为额定值时，U等于50mV或100mV。

这就制成霍尔直接检测（无放大）电流传感器。

3．霍尔磁补偿原理原边主回路有一被测电流I1，将产生磁通Φ1，被副边补偿线圈通过的电流I2所产生的磁通Φ2进行补偿后保持磁平衡状态，霍尔器件则始终处于检测零磁通的作用。

所以称为霍尔磁补偿电流传感器。

这种先进的原理模式优于直检原理模式，突出的优点是响应时间快和测量精度高，特别适用于弱小电流的检测。

霍尔磁补偿原理如图1－3所示。

从图1－3知道：Φ1＝Φ2I1N1＝I2N2I2＝NI/N2·I1当补偿电流I2流过测量电阻RM时，在RM两端转换成电压。

做为传感器测量电压U0即：U＝I2RM按照霍尔磁补偿原理制成了额定输入从0.01A～500A系列规格的电流传感器。

由于磁补偿式电流传感器必须在磁环上绕成千上万匝的补偿线圈，因而成本增加；其次，工作电流消耗也相应增加；但它却具有直检式不可比拟的较高精度和快速响应等优点。

4．磁补偿式电压传感器为了测量mA级的小电流，根据Φ1＝I1N1，增加N1的匝数，同样可以获得高磁通Φ1。

YS2481
注意事项
1.霍尔是敏感器件，在使用过程以及存储过程中请注意采取静电防护措施。

2.霍尔在安装过程中应尽量避免对霍尔本体施加机械应力，如管脚需要弯曲请在距引线根部3MM 以外操作。

3.建议焊接温度：电烙铁焊接，建议温度350℃，最长5秒。

波峰焊：建议最高温度260℃，最长3秒红外回流焊：建议最高245℃，最长10秒
4.不建议超越数据表中的参数使用，虽然极限参数下霍尔会正常工作，但是长时间处于极限条件下可能会造成霍尔或者实际产品的损坏，为了保障霍尔的正常工作和产品的安全性稳定性，请在数据表许可范围内使用。

PackagesFeatures and Benefits3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA)–Solid-State Reliability much better than reed Switch – Omnipolar, output switches with absolute value of North or South pole from magnet – Operation from 3.5V to 24V–High sensitivity for direct reed switch replacement applicationsFunctional Block Diagram Application Examples– Solid state switch – Speed detection – Interrupter–Magnet proximity sensor for reed switch replacementGeneral Description:The SS249 Omnipolar Hall effect sensor IC is fabricated from mixed signal CMOS technology .It incorporates advanced chopper-stabilization techniques to provide accurate and stable magnetic switch points.The output transistor of the SS249 will be latched on (BOP) in the presence of a sufficiently strong South or North magnetic field facing the marked side of the package. The output will be latched off (BRP) in the absence of a magnetic field.Typical Application CircuitSEC's pole-independent sensing technique allows for operation with either a north pole or south pole magnet orientation, enhancing the manufacturability of the device. The state-of-the-art technology provides the same output polarity for either pole face.It is strongly recommended that an external bypass be connected (in close proximity to the Hall sensor) between the supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization technique. This is especially true due to the relatively high impedance of battery supplies.Internal Timing CircuitAutomotive and Severe Environment Protection Circuit Typical Three-Wire Application CircuitPin Definitions and DescriptionsTable 1: Pin definitions and descriptionsAbsolute Maximum RatingsExceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.DC Electrical CharacteristicsDC Operating Parameters: T A = 25℃, V DD= 2.75V.Parameter Symbol Test Conditions Min Typ Max UnitsOperating Voltage V DD Operating 2.5 3 5.5 VSupply Current I DD Average 5 µAOutput Current I OUT 1.0 mASaturation Voltage V SAT I OUT = 1mA 0.4 VAwake mode time T AW Operating 175 µSSleep mode time T SL Operating 70 mSTable 3: DC electrical characteristicsMagnetic CharacteristicsOperating Parameters: T A = 25°C, V DD = 2.75V DCESD ProtectionPerformance CharacteristicsUnique FeaturesCMOS Hall IC TechnologyThe chopper stabilized amplifier uses switched capacitor techniques to eliminate the amplifier offset voltage, which, in bipolar devices, is a major source of temperature sensitive drift. CMOS makes this advanced technique possible. The CMOS chip is also much smaller than a bipolar chip, allowing very sophisticated circuitry to be placed in less space. The small chip size also contributes to lower physical stress and less power consumption.Installation CommentsConsider temperature coefficients of Hall IC and magnetic, as well as air gap and life time variations. Observe temperature limits during wave soldering. Typical IR solder-reflow profile:– No Rapid Heating and Cooling.– Recommended Preheating for max. 2minutes at 150°C– Recommended Reflowing for max. 5seconds at 240°CESD PrecautionsElectronic semiconductor products are sensitive to Electro Static Discharge (ESD).Always observe Electro Static Discharge control procedures whenever handling semiconductor products.Package UA, 3-Pin SIP:Package SOT, 3-Pin SOT-23:SOT-23 Package Hall Location:Ordering InformationPart No. Pb-free Temperature Code Package Code PackingSS249ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/reel SS249EUA YES -40°C to 85°C TO-92 Bulk, 1000 pieces/bagSS249KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/reel SS249KUA YES -40°C to 125°C TO-92 Bulk, 1000 pieces/bagSS249LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/reel SS249LUA YES -40°C to 150°C TO-92 Bulk, 1000 pieces/bag。

常用传感器应用一、温度传感器1、热敏电阻：分类：正温度系数 (PTC)、负温度系数 (NTC) 、临界温度热敏电阻（CTR ）实验室使用的是电阻值随温度的增加而减小的热敏电阻（负温度系数热敏电阻），常温状态下热敏电阻阻值约为9.3K。

应该指出，由于热敏电阻的线性不好，现在已基本不再用来作温度测量使用了。

但是由于成本低，在定点温度控制等场合中还有较大的应用市场。

单点测温电路如下：（电路中 R2的作用是改善 RT随温度变化的非线性性）VCCR1R2R33.6K10KRTU1R4 10KR6 1 0K R81 KOPR9 A R55 K10KD1LEDR71 K2、温控开关：按开关类型分为常开可逆、常闭可逆和常开不可逆、常闭不可逆四种。

还可以按照临界温度分，温控开关的临界温度一般标称在开关体上。

二、声电式传感器1、压电陶瓷片：工作原理：当压电陶瓷片上受到外加压力时，陶瓷片发生机械变形，其极化强度随之变小，使一部分附加在陶瓷片表面的电荷释放出来，而产生放电现象。

当压力取消后，又恢复原状，极化强度增大，电极上又吸附一部分电荷，出现充电现象。

这种由机械能转变为电能的现象，称为“正压电效应”。

反之，当在压电陶瓷片上加一电场，陶瓷片则发生机械变形。

当外加电场方向陶瓷片极化方向相同时，极化强度增大，使陶瓷片沿极化方向伸长。

当外加电场方向与陶瓷片极化方向相反时，陶瓷片沿极化方向缩短。

这种由电能转变为机械能的现象，称为“反压电效应”。

测试电路图如下： ( 电路连接时注意区分正负极，与背面金属铜连接的为负端，涂银层为正端 )+5VR1 AR3R4R5R66 80350K13K 2.7 K500 KC1C2R2OUT1 K10u F 4 7u FQ1Q2Q3901 39013901 3Y12、驻极体话筒：驻极体话筒及其电路的接法有两种：源极输出与漏极输出。

源极输出类似晶体三极管的射极输出。

需用三根引出线。

漏极 D 接电源正极。

简介0.0 简介Stratagem这套仪器是一种用来测量地下几米到一公里多深的地球电阻率的特殊大地电磁测深（MT）仪器。

这套仪器既可以使用天然场源的大地电磁信号，又可以使用人工场源的电磁信号，以此来获得测量点下的电性结构。

大地电磁测深（MT）仪器是通过同时对一系列当地电场和磁场波动的测量来获得地表的电阻抗。

这些野外测量要经过几分钟；傅立叶变换以后以能谱存储起来。

这些通过能谱值计算出来的表面阻抗是一个复杂的频率函数，在这个频率函数中，高频数据受到浅部或附近的地质体的影响，而低频数据受到深部或远处地质体的影响。

一个大地电磁（MT）测量给出了测量点以下垂直电阻率的估计值，同时也表明了在测量点的地电复杂性。

在那些点到点电阻率分布变化不快的地方，电阻率的探测是一个对测量点下地电分层的一个合理估计。

Stratagem这套系统是由两个基本组件构成：一个接受机，一个发射机。

在高频段，天然信号通常比较微弱，使用发射机能够提高数据的质量；对于某些应用或某些情况下，由发射机提供的额外的高频信号我们可以不必使用。

Stratagem这套仪器可以有效的用于地下水调查、环境的地下特征调查、矿产与地热勘探及工程研究。

因为该仪器的供电电池既灵巧致密又便携，所以即使在崎岖的山区和恶劣的地区也能顺利的操作和工作，Stratagem系统的快速采集速度和便携性为我们的勘察设计提供了灵活性。

表面阻抗可以很快的以电阻率的形式显示出来，也可以一组组处理，并实时在剖面中呈现出来，这种实时显现的灵活多样性能够让调查者根据对初步处理和测量结果的分析而改变测量设计。

1．0系统配件以下说明的是Stratagem的各个组件。

该系统配置的标准接收机设计的采集频宽为100KHz到11.7Hz。

可选的接收机组件和标准的接收机一块使用它的采集频率可以从1000Hz 扩展到0.1Hz。

标准配件及它们的连接见图一和图二。

标准接收机配件4 不锈钢电极1 系统地电极与接地电缆4 带有26米电缆的缓冲电极1 前置放大器2 磁探头（型号BF6）2 磁探头连接线1 EH4主机1 IBM键盘1 主机控制电缆1 主机电源线1 操作说明书1 深循环12伏可充电电池（不包括在电解组件）可选接受机组件4 非极化电极（铜-硫酸铜）4 100米电极线2 磁探头（BF10）2 磁探头连接线发射机组件（400A㎡）2 发射天线组合1 中心扣环1 发射机1 发射机电源线和接地电极1 发射控制器和电缆1 发射机存储包1深循环12伏可充电电池(NOT included with lease-pool units)发射机组件（5000安系统）2 发射天线组合1 循环回路天线组件4 带拉杆的夹板回路天线组件7 高标准的金属电极8 发射机1发射机电源线和接地电极1发射控制器电缆组1深循环12伏可充电电池(NOT included with lease-pool units)可选有用配件罗盘（秀珍经纬仪可以定方向，校准磁探头水平）水平仪（如没有袖珍经纬仪可用的情况下可以用用来校准磁探头水平）测量尺（至少30米长）水容器（装水用来湿润非极化电极）铲子和挖壕工具（用来埋磁传感器和非极化电极）小铁锤或地质锤（使钢电极插入坚硬的土里）万用表（用来检查电池，测量电阻，检查接触电阻和电路接通）彩旗和塑料锥（用来标主测点）对讲机及充电器（用于发射机与接收机两地之间的人员通讯）外部的框架背包（用于携带主机）野外的笔记本或文件夹（用于野外记录和热敏打印机的输出）12伏电池充电器系统备份：时间序列文件因太大而不能存储在高密度软盘上，一般情况一天中生成的数据大概在50到100M之间。

PLA 90Counter LoopMAN 173DWe would like to congratulate you on purchasing your portable induction loop system PLA 90. Y ou have chosen a modern, reliable device. Please read these operating instructions carefully. This describes how to set up the system correctly and explains all the system features. Standard componentsPlease check if all following components are included:- Portable induction loop system PLA 90 with integrated battery,- Power supply unit- 3 color signal strips- 2 T-coil labels- 4 rubber feet- Operating instructions- Warranty cardIf any parts are missing, please contact your dealer immediately.How it worksThe PLA 90 uses its built-in microphone or an external microphone to pick up sounds and emits them via the integrated induction loop. The signals emitted in this way can be received by a hearing aid that is set to the “T” or “MT” position.Setting up the PLA 90The induction loop system is already completely installed and set up in the housing. All you have to do is to place the PLA 90 at the desired position between you and the person you are talking to and connect the power supply unit. Please note that the microphone on the back of the device should be facing the person speaking.Switching the device onT o switch the induction loop system on, press the “Power on“ button on the rear side of the device. Once the device is switched on, the “Power on” light on the rear of the device will light up green, and the “Power on” light on the front will light up blue.Picking up/ emitting signalsIf sounds are picked up by the microphone on the back of the device or via an external microphone and emitted by the device as magnetic signals, the status light “loop signal” will flash orange.Controls and IndicatorsColor signal stripFront Viewjack microphone input jack Built-in microphone Microphone adjustment Volume control Microphone selection switch (internal/external)Theft protection via Kensington™lockRear ViewAdditional microphone input(3.5 mm plug)An external microphone can be connected to the additional microphone input.Microphone selection switchWith the microphone selection switch you can choose the microphone which should record the sounds.Switch position:Up: internal microphoneDown: external microphoneSetting the sensitivity of the microphone inputWith the control dial on the backside of the device you can adjust the sensitivity of the microphone input. This is useful if you want to connect a low-output microphone to the PLA 90.Headphone jack (3.5 mm plug)Y ou can connect the following products to the Headphone jack:- Under-the-chin receiver- Unobtrusive earphones- Lightweight headset- Audio-Cable monaural- Audio-Cable binaural- Induction Link monaural- Induction Link binauralVolume controlThe volume control adjusts the volume of the headphone jack. Automatic switch offThe PLA 90 will switch off automatically after 2 minutes if no signal is received, from either the internal or external microphone.Charging control lightLED flashes red = Battery is in the process of being rechargedLED off = Battery is fully rechargedPermanent installation of the PLA 90The PLA 90 can be screw-fastened through the lateral holes to a tabletop or other surfaces. The holes are located under the side covers. Remove the covers as shown in the picture below.Retaining clipSide cover Holes for screw fasteningSwitching the device offT o switch the induction loop system off, press the “Power off” button on the rear side of the device. The “Power on” control light goes off.Power supply for the PLA 90The PLA 90 can be operated using the built-in rechargeable battery or the power supply unit. If the battery is fully charged, the device can be used for up to 6 hours.A depleted battery has to be recharged for approximately 3 hours until it reaches full capacity again. Y ou can also use thePLA 90 while it is being charged, but please note that this will lengthen the time required to fully recharge the battery. The device can remain connected to the power supply for as long as desiredWall mounting1. Screw in two screws (not included)14.1 cm apart at the place you would like to mount the PLA 90 on the wall (see figure).2. Now set the PLA 90 on the screws and slide it down slightly to secure it in place.5.55 inChanging the color signal stripY ou can change the color signal strip of the PLA 90, as shown below.Maintenance and careThe PLA 90 does not require any maintenance. If the unit becomes dirty, simply wipe it clean with a soft, damp cloth. Never use spirits, thinners or other organic solvents. Do not set up the unit where it will be exposedto full sunlight for long periods. In addition it must be protected against excessive heat, moisture and severe mechanical shock. Note: This product is not protected against splash water. Do not place any containers filled with water, such as flower vases, or anything with an open flame, such as a lit candle, on or near the product.SpecificationsDimensions:7-7/8" H x 7-1/4" W x 2-15/16" D(200 x 185 x 70 mm)Weight: 1.4 lb (635 g) (with battery installed)Power supply:Input: 100-240 VAC, 50-60 HzOutput: 16 VDCRechargeable battery:12 V NiMH, user-replaceable.Operating time per charge:Up to 6 hoursBattery charging time:Approximately 3 hoursOutput power:10 WMicrophone Sensitivity:Up to 60 dB ±3 dBCE Certification (EU directives):2002/95/EG RoHS 2002/96/EG WEEE 2004/108/EG EMC 2006/95/EG Low voltageCompliance with the directives listed above is confirmed by the CE seal on the device. Specifications subject to change without notice.WarrantyThe PLA 90 is a very reliable product. Should a malfunction occur despite the unit having been set up and operated correctly, please contact your dealer.The warranty covers the repair of the product and returning it to you free of charge during the warranty period. It is essential that you send in the product in its original packaging, so do not throw the packaging away. The warranty does not apply to damage caused by incorrect handling or attempts to repair the unit by people not authorized to do so (destruction of the seal on the unit). Repairs under warranty are only carried out providing the enclosed warranty card is filled out and returned to dealer; also a copy of the sales slip is required.Unit disposalDisposal of used electric and electronic units (applicable in thecountries of the European Union and other European countrieswith a separate collection system). The symbol on the productor the packaging indicates that this product is not to be handledas ordinary household waste but has to be returned to a collecting point for the recycling of electric and electronic units. Y ou protect health and environment by the correct disposal of this product. Material recycling helps to reduce the consumption of raw material. Y ou will receive further information on the recycling of this product from your local community, your communal disposal company or your local dealer.Rechargeable battery disposalThe rechargeable battery that comes with the device can berecycled.Please dispose of this rechargeable battery in receptaclesdesigned for that purpose or return it to a retail outlet. Disposeonly of those batteries that have been completely discharged toensure environmental protection.*******************/ 800-843-3544 / INTL: +1-952-943-2252©2019 Williams AV • All Rights Reserved MAN 173D。

General DescriptionThe MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communica-tions interfaces, particularly applications where ±12V is not available.These parts are especially useful in battery-powered sys-tems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225,MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for appli-cations where printed circuit board space is critical.________________________ApplicationsPortable Computers Low-Power Modems Interface TranslationBattery-Powered RS-232 Systems Multidrop RS-232 NetworksNext-Generation Device Features♦For Low-Voltage, Integrated ESD ApplicationsMAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E: +3.0V to +5.5V, Low-Power, Up to 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors (MAX3246E Available in a UCSP™Package)♦For Low-Cost ApplicationsMAX221E: ±15kV ESD-Protected, +5V, 1µA,Single RS-232 Transceiver with AutoShutdown™MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers________________________________________________________________Maxim Integrated Products 1Selection Table19-4323; Rev 15; 1/06Power No. of NominalSHDN RxPart Supply RS-232No. of Cap. Value & Three-Active in Data Rate Number (V)Drivers/Rx Ext. Caps (µF)State SHDN (kbps)FeaturesMAX220+52/240.047/0.33No —120Ultra-low-power, industry-standard pinout MAX222+52/2 4 0.1Yes —200Low-power shutdownMAX223 (MAX213)+54/54 1.0 (0.1)Yes ✔120MAX241 and receivers active in shutdown MAX225+55/50—Yes ✔120Available in SOMAX230 (MAX200)+55/04 1.0 (0.1)Yes —120 5 drivers with shutdownMAX231 (MAX201)+5 and2/2 2 1.0 (0.1)No —120Standard +5/+12V or battery supplies; +7.5 to +13.2same functions as MAX232MAX232 (MAX202)+52/24 1.0 (0.1)No —120 (64)Industry standardMAX232A+52/240.1No —200Higher slew rate, small caps MAX233 (MAX203)+52/20— No —120No external capsMAX233A+52/20—No —200No external caps, high slew rate MAX234 (MAX204)+54/04 1.0 (0.1)No —120Replaces 1488MAX235 (MAX205)+55/50—Yes —120No external capsMAX236 (MAX206)+54/34 1.0 (0.1)Yes —120Shutdown, three stateMAX237 (MAX207)+55/34 1.0 (0.1)No —120Complements IBM PC serial port MAX238 (MAX208)+54/44 1.0 (0.1)No —120Replaces 1488 and 1489MAX239 (MAX209)+5 and3/52 1.0 (0.1)No —120Standard +5/+12V or battery supplies;+7.5 to +13.2single-package solution for IBM PC serial port MAX240+55/54 1.0Yes —120DIP or flatpack package MAX241 (MAX211)+54/54 1.0 (0.1)Yes —120Complete IBM PC serial port MAX242+52/240.1Yes ✔200Separate shutdown and enableMAX243+52/240.1No —200Open-line detection simplifies cabling MAX244+58/104 1.0No —120High slew rateMAX245+58/100—Yes ✔120High slew rate, int. caps, two shutdown modes MAX246+58/100—Yes ✔120High slew rate, int. caps, three shutdown modes MAX247+58/90—Yes ✔120High slew rate, int. caps, nine operating modes MAX248+58/84 1.0Yes ✔120High slew rate, selective half-chip enables MAX249+56/1041.0Yes✔120Available in quad flatpack packageFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering InformationOrdering Information continued at end of data sheet.*Contact factory for dice specifications.AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243Note 1:For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.Note 2:Input voltage measured with T OUT in high-impedance state, SHDN or V CC = 0V.Note 3:Maximum reflow temperature for the MAX233A is +225°C.Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply Voltage (V CC )...............................................-0.3V to +6V V+ (Note 1)..................................................(V CC - 0.3V) to +14V V- (Note 1).............................................................+0.3V to +14V Input VoltagesT IN ..............................................................-0.3V to (V CC - 0.3V)R IN (Except MAX220)........................................................±30V R IN (MAX220).....................................................................±25V T OUT (Except MAX220) (Note 2).......................................±15V T OUT (MAX220)...............................................................±13.2V Output VoltagesT OUT ...................................................................................±15V R OUT .........................................................-0.3V to (V CC + 0.3V)Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (T A = +70°C)16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C)..440mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C)...696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C)..........640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature RangesMAX2_ _AC_ _, MAX2_ _C_ _.............................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _..........................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _.......................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10s) (Note 3)...................+300°CMAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________3Note 4:MAX243 R2OUT IN ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 4_________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243108-1051525OUTPUT VOLTAGE vs. LOAD CURRENT-4-6-8-2642LOAD CURRENT (mA)O U T P U T V O L T A G E (V )1002011104104060AVAILABLE OUTPUT CURRENTvs. DATA RATE65798DATA RATE (kb/s)O U T P U T C U R R E N T (m A )203050+10V-10VMAX222/MAX242ON-TIME EXITING SHUTDOWN+5V +5V 0V0V 500μs/div V +, V - V O L T A G E (V )ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)(V CC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T A = T MIN to T MAX ‚ unless otherwise noted.)MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________5V CC ...........................................................................-0.3V to +6V V+................................................................(V CC - 0.3V) to +14V V-............................................................................+0.3V to -14V Input VoltagesT IN ............................................................-0.3V to (V CC + 0.3V)R IN ......................................................................................±30V Output VoltagesT OUT ...................................................(V+ + 0.3V) to (V- - 0.3V)R OUT .........................................................-0.3V to (V CC + 0.3V)Short-Circuit Duration, T OUT ......................................Continuous Continuous Power Dissipation (T A = +70°C)14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow Plastic DIP(derate 13.33mW/°C above +70°C)..........1.07W24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW20-Pin Wide SO (derate 10.00mW/°C above +70°C).......800mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C).....889mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C)..........727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C)........800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C)........889mW 24-Pin Narrow CERDIP(derate 12.50mW/°C above +70°C)..............1W24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW Operating Temperature RangesMAX2 _ _ C _ _......................................................0°C to +70°C MAX2 _ _ E _ _...................................................-40°C to +85°C MAX2 _ _ M _ _......................................................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10s) (Note 4)...................+300°CABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note 4:Maximum reflow temperature for the MAX233/MAX235 is +225°C.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________78.56.54.55.5TRANSMITTER OUTPUT VOLTAGE (V OH ) vs. V CC7.08.0V CC (V)V O H (V )5.07.57.46.02500TRANSMITTER OUTPUT VOLTAGE (V OH )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.46.27.27.0LOAD CAPACITANCE (pF)V O H (V )1500100050020006.86.612.04.02500TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE6.05.011.09.010.0LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )1500100050020008.07.0-6.0-9.04.55.5TRANSMITTER OUTPUT VOLTAGE (V OL ) vs. V CC-8.0-8.5-6.5-7.0V CC (V)V O L (V )5.0-7.5-6.0-7.62500TRANSMITTER OUTPUT VOLTAGE (V OL )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES-7.0-7.2-7.4-6.2-6.4LOAD CAPACITANCE (pF)V O L (V )150010005002000-6.6-6.810-105101520253035404550TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CURRENT-2-6-4-886CURRENT (mA)V +, V - (V )420__________________________________________Typical Operating CharacteristicsMAX223/MAX230–MAX241*SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTSV+, V- WHEN EXITING SHUTDOWN(1μF CAPACITORS)MAX220-13SHDN*V-O V+500ms/divM A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 8_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply Voltage (V CC )...............................................-0.3V to +6V Input VoltagesT IN ‚ ENA , ENB , ENR , ENT , ENRA ,ENRB , ENTA , ENTB ..................................-0.3V to (V CC + 0.3V)R IN .....................................................................................±25V T OUT (Note 5).....................................................................±15V R OUT ........................................................-0.3V to (V CC + 0.3V)Short Circuit (one output at a time)T OUT to GND............................................................Continuous R OUT to GND............................................................ContinuousContinuous Power Dissipation (T A = +70°C)28-Pin Wide SO (derate 12.50mW/°C above +70°C).............1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C)...611mW 44-Pin PLCC (derate 13.33mW/°C above +70°C)...........1.07W Operating Temperature RangesMAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering,10s) (Note 6)....................+300°CNote 5:Input voltage measured with transmitter output in a high-impedance state, shutdown, or V CC = 0V.Note 6:Maximum reflow temperature for the MAX225/MAX245/MAX246/MAX247 is +225°C.MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________9Note 7:The 300Ωminimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or V CC =0V is 10M Ωas is implied by the leakage specification.ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 10________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX225/MAX244–MAX24918212345TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE86416LOAD CAPACITANCE (nF)T R A N S M I T T E R S L E W R A T E (V /μs )14121010-105101520253035OUTPUT VOLTAGEvs. LOAD CURRENT FOR V+ AND V--2-4-6-88LOAD CURRENT (mA)O U T P U T V O L T A G E (V )64209.05.012345TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.05.58.5LOAD CAPACITANCE (nF)V +, V (V )8.07.57.06.5MAX220–MAX249Drivers/ReceiversFigure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay TimingFigure 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable TimingM A X 220–M A X 249Drivers/Receivers ENT ENR OPERATION STATUS TRANSMITTERSRECEIVERS00Normal Operation All Active All Active 01Normal Operation All Active All 3-State10Shutdown All 3-State All Low-Power Receive Mode 11ShutdownAll 3-StateAll 3-StateTable 1a. MAX245 Control Pin ConfigurationsENT ENR OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All Active RA1–RA4 3-State,RA5 Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll 3-StateAll Low-Power Receive Mode All Low-Power Receive Mode 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RB5 Low-Power Receive ModeTable 1b. MAX245 Control Pin ConfigurationsTable 1c. MAX246 Control Pin ConfigurationsENA ENB OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All 3-State All Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll ActiveRA1–RA4 3-State,RA5 Active All Active 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RA5 Low-Power Receive ModeMAX220–MAX249Drivers/ReceiversM A X 220–M A X 249_______________Detailed DescriptionThe MAX220–MAX249 contain four sections: dual charge-pump DC-DC voltage converters, RS-232 dri-vers, RS-232 receivers, and receiver and transmitter enable control inputs.Dual Charge-Pump Voltage ConverterThe MAX220–MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to dou-ble the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output.A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section),except on the MAX225 and MAX245–MAX247, where these pins are not available. V+ and V- are not regulated,so the output voltage drops with increasing load current.Do not load V+ and V- to a point that violates the mini-mum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222,MAX225, MAX230, MAX235, MAX236, MAX240,MAX241, and MAX245–MAX249, avoid using V+ and V-to power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applica-tions where a +10V external supply is applied to the V+pin (instead of using the internal charge pump to gen-erate +10V), the C1 capacitor must not be installed and the SHDN pin must be tied to V CC . This is because V+is internally connected to V CC in shutdown mode.RS-232 DriversThe typical driver output voltage swing is ±8V when loaded with a nominal 5k ΩRS-232 receiver and V CC =+5V. Output swing is guaranteed to meet the EIA/TIA-232E and V.28 specification, which calls for ±5V mini-mum driver output levels under worst-case conditions.These include a minimum 3k Ωload, V CC = +4.5V, and maximum operating temperature. Unloaded driver out-put voltage ranges from (V+ -1.3V) to (V- +0.5V).Input thresholds are both TTL and CMOS compatible.The inputs of unused drivers can be left unconnected since 400k Ωinput pullup resistors to V CC are built in (except for the MAX220). The pullup resistors force the outputs of unused drivers low because all drivers invert.The internal input pullup resistors typically source 12µA,except in shutdown mode where the pullups are dis-abled. Driver outputs turn off and enter a high-imped-ance state—where leakage current is typically microamperes (maximum 25µA)—when in shutdownmode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The power-supply current typically drops to 8µA in shutdown mode.The MAX220 does not have pullup resistors to force the outputs of the unused drivers low. Connect unused inputs to GND or V CC .The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240,and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver three-state control on the receiver outputs.The receiver TTL/CMOS outputs are in a high-imped-ance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239–MAX241), and are also high-impedance whenever the shutdown control line is high.When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1µA with the driver output pulled to ground. The driver output leakage remains less than 1µA, even if the transmitter output is backdriven between 0V and (V CC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1k Ωseries impedance. The transmitter is also zener clamped to approximately V CC + 6V, with a series impedance of 1k Ω.The driver output slew rate is limited to less than 30V/µs as required by the EIA/TIA-232E and V.28 specifica-tions. Typical slew rates are 24V/µs unloaded and 10V/µs loaded with 3Ωand 2500pF.RS-232 ReceiversEIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert.Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels.The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors withDrivers/ReceiversTable 2. Three-State Control of ReceiversMAX220–MAX249Drivers/Receiversnominal 5k Ωvalues. The receivers implement Type 1interpretation of the fault conditions of V.28 and EIA/TIA-232E.The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear out-put transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.Low-Power Receive ModeThe low-power receive mode feature of the MAX223,MAX242, and MAX245–MAX249 puts the IC into shut-down mode but still allows it to receive information. This is important for applications where systems are periodi-cally awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communi-cation at faster data rates. This operation conserves system power.Negative Threshold—MAX243The MAX243 is pin compatible with the MAX232A, differ-ing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left floating without interrupting communication. Different cables are not needed to interface with different pieces of equipment.The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is con-nected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA-232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left floating‚or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚the control lines must either be driven or connected with jumpers to an appropriate positive voltage level.Shutdown—MAX222–MAX242On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown.On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5µs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SH DN for MAX241) also disables the receiver outputs.The MAX225 provides five transmitters and five receivers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply cur-rent drops to less than 25µA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver out-puts are controlled by the ENR input‚ while the remain-ing two receivers (RA5 and RB5) are always active.RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high.Receiver and Transmitter EnableControl InputsThe MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls.The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and low-power receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.M A X 220–M A X 249Tables 1a–1d define the control states. The MAX244has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA )causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB ) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one A-side and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shut-down mode when both the A and B sides are disabled (ENA = ENB = +5V).The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active.The device enters shutdown mode with a logic high on both ENTA and ENTB .The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and trans-mitters go into a three-state mode with a logic high on both ENTA and ENTB .The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three dri-vers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB . In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s.__________Applications InformationFigures 5 through 25 show pin configurations and typi-cal operating circuits. In applications that are sensitive to power-supply noise, V CC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device.Drivers/Receivers。

1EsGate 2用于带有 8.2 kΩ 电阻传感器的安全监控器中文版说明书概览1安全说明2普遍应用中文387811D 07/21• 在将设备投入运行之前，应先彻底阅读本操作说明，并保留本操作说明以便将来参考。

• 除了规定的应用，不得将本产品用于其他用途。

• 只允许经过培训且有资质的人员安装设备并完成对设备的初始化。

• 只有获得授权的制造商的人员才能改动产品的硬件/软件或者维修产品。

• 请注意遵守当地所有相关的电气安全规定！• 如果没有遵守这些安全措施，可能会导致设备损坏或其他财产损失以及严重的人身伤害，甚至造成人员死亡。

• 安装人员有责任进行风险评估，并根据适用的地方、国家和国际法规、安全标准、法规和法律，以及在适用的情况下，根据欧盟机械指令 2006/42/EC 安装本系统。

• 必须遵守所有与门安全相关的当地、国家和国际标准、法规和法律。

• 对于您的应用，始终将安全功能视作一个整体，切勿认为仅关系到系统的某一部分。

• 安装人员应负责测试系统，以确保系统满足所有适用的安全标准。

• 在对电子元件进行操作期间— 例如，如果发生短路，会释放出炙热的电离气体； 请勿取下保护盖！• 根据欧洲标准 EN 61558，只允许使用带有安全电气隔离装置的安全特低电压 (SELV) 运行本装置。

• 必须防止布线受到机械损坏。

开始安装或组装之前，必须采取以下安全措施：• 检查开关设备标签上的电压数据。

• 确保不会接通设备/装置的电源！• 确定电源已断开！• 给设备装上外壳，免受污染或腐蚀性环境的损坏！• 遮挡或拧下带电的相邻零件！• 如果发生故障，应将设备与市电断开。

• 原则上避免与电子元器件发生接触。

• 对意外接触的保护是有限的！LED 灯 LCD 显示屏 “模式”按钮 “数据”按钮 端子普遍应用EsGate 2安全监控器用于监测工业门压力传感器（对于安全触边根据EN ISO 13856-2)。

满足EN ISO 13849-1 中PLd,Cat.2类保护等级要求。

nura型号：E00B 电源：5伏，0.2安培无线频段：2400-2483.5 兆赫NURATRUE 用户手册nura 目录NURATRUE安全信息 3入门 4包装清单 4佩戴NURATRUE 5打开/关闭NURATRUE 6下载Nura应用程序 6通过Bluetooth®连接NURATRUE 6在Bluetooth®设备之间切换 6对NURATRUE进行个性化设置 7更新NURATRUE 7您的NURATRUE 8检查充电盒电池 8使用NURATRUE触控按钮 8使用NURATRUE拨打和接听语音电话 9将NURATRUE连接到其它产品 9计算机 9电视 9更换NURATRUE耳塞头 9更换NURATRUE支垫附件 10清洁NURATRUE 10 Nura应用程序 11 Nura应用程序的功能 11选择沉浸程度 12调整主动降噪/社交模式 12更改NURATRUE语音语言 12切换、添加和删除听力配置文件 13故障排除 14重置NURATRUE 14充电故障排除 14个性化故障排除 14 Nura应用程序故障排除 15蓝牙故障排除 15语音通话故障排除 15音质故障排除 16触控按钮故障排除 16需要更多帮助？ 16保修条款 16合规性 17nura NURATRUE安全信息首次使用NURATRUE前，请阅读本手册。

请将本手册置于触手可及之处，以备将来参考。

NURATRUE设计和测试确保安全性和舒适性，但请注意：暴露于85分贝或以上（与食物搅拌机的音量大致相同）的任何噪音中都可能导致听力逐渐丧失。

由于NURATRUE的清晰度和降噪功能，在听音乐时，无需像许多传统耳机那样使用很高的音量。

请自行监控使用情形。

听力损失是音量与时间函数造成的 - 因此，音量越大，畅听的时间就应短一些。

音量越小，可以畅听的时间就可以长一些。

例如：85分贝情况下8小时造成的损害与88分贝情况下4小时、91分贝情况下2小时或100分贝情况下仅15分钟造成的损害相同。