MAX8719中文资料

________________General DescriptionThe MAX4617/MAX4618/MAX4619 are high-speed, low-voltage, CMOS analog ICs configured as an 8-channel multiplexer (MAX4617), two 4-channel multiplexers (MAX4618), and three single-pole/double-throw (SPDT)switches (MAX4619).These CMOS devices can operate continuously with a +2V to +5.5V single supply. Each switch can handle Rail-to-Rail ®analog signals. The off-leakage current is only 1nA at T A = +25°C and 10nA at T A = +85°C.All digital inputs have 0.8V to 2.4V logic thresholds,ensuring TTL/CMOS-logic compatibility when using a single +5V supply.________________________ApplicationsBattery-Operated Equipment Audio/Video Signal RoutingLow-Voltage Data-Acquisition Systems Communications Circuits____________________________Featureso Fast Switching Times15ns t ON 10ns t OFFo Pin Compatible with Industry-Standard 74HC4051/74HC4052/74HC4053 and MAX4581/MAX4582/MAX4583o Guaranteed On-Resistance10Ωmax (+5V Supply)20Ωmax (+3V Supply)o Guaranteed 1Ω On-Resistance Match Between Channels (single +5V supply)o Guaranteed Low Off-Leakage Current:1nA at +25°Co Guaranteed Low On-Leakage Current:1nA at +25°Co +2V to +5.5V Single-Supply Operation o TTL/CMOS-Logic Compatible o Low Crosstalk: <-96dB o High Off-Isolation: <-93dBo Low Distortion: <0.017% (600Ω)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches________________________________________________________________Maxim Integrated Products1____________________________________Pin Configurations/Functional Diagrams19-1502; Rev 0; 7/99_______________Ordering InformationOrdering Information continued at end of data sheet.Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.For free samples & the latest literature: , or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.16 Plastic DIP16 Narrow SO 16 TSSOP PIN-PACKAGE TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°CMAX4617CPEMAX4617CSE MAX4617CUE PARTM A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS—Single +5V Supply(V CC = +4.5V to +5.5V, V _H = 2.4V, V _L = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)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.Voltages Referenced to GNDV CC, A, B, C, or Enable...........................................-0.3V to +6V Voltage into Any Analog Terminal(Note 1).........................................................-0.3V to (V CC + 0.3V)Continuous Current into Any Terminal..............................±75mA Peak Current, X_, Y_, Z_(pulsed at 1ms, 10% duty cycle).................................±200mA Continuous Power Dissipation (T A = +70°C)TSSOP (derate 6.7mW/°C above +70°C)......................533mWNarrow SO (derate 8.70mW/°C above +70°C)..............696mW Plastic DIP (derate 10.53mW/°C above +70°C)..............842mW Operating Temperature RangesMAX461_C_ _ ......................................................0°C to +70°C MAX461_E_ _....................................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10sec).............................+300°CNote 1:Voltages exceeding V CC or GND on any analog signal terminal are clamped by internal diodes. Limit forward-diode currentto maximum current rating.MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)(V CC = +4.5V to +5.5V, V _H = 2.4V, V _L = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—Single +3.3V Supply(V CC = +3V to +3.6V, V _H = 2.0V, V _L = 0.5V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches_______________________________________________________________________________________5Note 2:The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.Note 3:∆R ON = R ON(MAX)- R ON(MIN).Note 4:Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specifiedanalog signal ranges; i.e., V X_, V Y_, V Z_= 3V to 0 and 0 to -3V.Note 5:Leakage parameters are 100% tested at maximum-rated hot operating temperature, and guaranteed by correlation at T A = +25°C.Note 6:Guaranteed by design, not production tested.ELECTRICAL CHARACTERISTICS—Single +2.5V Supply(V CC = +2.5V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches 6_______________________________________________________________________________________252015105002.53.0 3.54.0 4.50.5 1.0 1.5 2.05.0ON-RESISTANCE vs. V X , V Y , V ZV X , V Y , V Z (V)O N -R E S I S T A N C E (Ω)02.53.01.52.00.51.03.54.04.55.002.01.50.5 1.0 2.53.0 3.54.0 4.55.0ON-RESISTANCE vs.V X , V Y , V ZAND TEMPERATUREV X , V Y , V Z (V)R O N (Ω)10000.01-4010020406080-20OFF-LEAKAGE vs. TEMPERATURE1010.1100TEMPERATURE (°C)O F F -L E A K A G E (p A )0.1110100-40-2020406080100ON-LEAKAGE vs. TEMPERATUREM A X 4617 t o c 04TEMPERATURE (°C)O N -L E A K A G E (p A )042681416181210201.0 1.52.0 2.50.53.0 3.54.0 4.55.0CHARGE INJECTION vs. V X , V Y , V ZM A X 4617 t o c 05V X , V Y , V Z (V)C H A R G E I N J E C T I O N (p C )SUPPLY CURRENT vs. TEMPERATURE10,0001-40206040-201008010TEMPERATURE (°C)I C C (p A )10010000SUPPLY CURRENT vs.LOGIC VOLTAGE2.5V A , V B , V C , V ENABLE (V)I C C (m A )2.01.50.51.05.02.01.00.5 1.53.53.02.54.54.0Typical Operating Characteristics(V CC = +5V, GND = 0, T A = +25°C, unless otherwise noted.)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches_______________________________________________________________________________________700.0050.010.0150.020.0258104621214161820TOTAL HARMONIC DISTORTIONvs. FREQUENCYFREQUENCY (kHz)()42861210142.0 3.0 3.52.5 4.0 4.5 5.0 5.5SWITCHING TIME vs. VOLTAGEM A X 4617 t o c 11V+ (V)S W I T C H I N G T I M E S (n s )1.01.41.21.61.82.02.53.04.03.54.55.0INPUT HIGH LOGIC THRESHOLDvs. SUPPLY VOLTAGEM A X 4617 t o c 08V CC (V)V A , V B , V C , V E N A B L E (V )10k100k1M10M100M500MFREQUENCY RESPONSEFREQUENCY (Hz)G A I N (d B )P H A S E (°)-100-70-80-90-60-50-40-30-20-100-180-72-108-144-3603672108144180Typical Operating Characteristics (continued)(V CC = +5V, GND = 0, T A = +25°C, unless otherwise noted.)M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches 8_________________________________________________________________________________________________Applications InformationPower-Supply ConsiderationsOverviewThe MAX4617/MAX4618/MAX4619 construction is typi-cal of most CMOS analog switches. They have two sup-ply pins: V CC and GND. V CC and GND are used to drive the internal CMOS switches and set the limits of the ana-log voltage on any switch. Reverse ESD-protection diodes are internally connected between each analog-signal pin and both V CC and GND. If any analog signal exceeds V CC or GND, one of these diodes conducts.During normal operation, these and other reverse-biased ESD diodes leak, forming the only current drawn from V CC or GND.Virtually all the analog leakage current comes from the ESD diodes. Although the ESD diodes on a given signal pin are identical and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V CC or GND and the analog signal. This means their leakages will vary as the signal varies. The difference in the two diode leakages to the V CC and GND pins con-stitutes the analog-signal-path leakage current. All ana-log leakage current flows between each pin and one of the supply terminals, not to the other switch terminal.This is why both sides of a given switch can show leak-age currents of either the same or opposite polarity.V CC and GND power the internal logic and set the input logic limits. Logic inputs have ESD-protection diodes to ground.in both directions.Pin DescriptionMAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches_______________________________________________________________________________________9The logic-level thresholds are TTL/CMOS compatible when V CC is +5V. As V CC rises, the threshold increas-es; as V CC falls, the threshold decreases. For example,when V CC = +3V the guaranteed minimum logic-high threshold decreases to 2.0VPower SupplyThese devices operate from a single supply between +2.5V and +5.5V. All of the bipolar precautions must be observed. At room temperature, they actually “work”with a single supply near or below +2V, although as supply voltage decreases, switch on-resistance becomes very high.Overvoltage ProtectionProper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maxi-mum ratings because stresses beyond the listed rat-ings can cause permanent damage to the devices.Always sequence V CC on first, followed by the logic inputs and analog signals. If power-supply sequencing is not possible, add two small signal diodes (D1, D2) in series with the supply pins for overvoltage protection (Figure 1).Adding diodes reduces the analog-signal range to one diode drop below V CC and one diode drop above GND, but does not affect the devices’ low switch resis-tance and low leakage characteristics. Device opera-tion is unchanged, and the difference between V CC and GND should not exceed 6V. These protection diodes are not recommended if signal levels must extend to ground.High-Frequency PerformanceIn 50Ωsystems, signal response is reasonably flat up to 50MHz (see Typical Operating Characteristics ).Above 20MHz, the on-response has several minor peaks that are highly layout dependent. The problem is not turning the switch on, but turning it off. The off-state switch acts like a capacitor and passes higher frequen-cies with less attenuation. At 10MHz, off-isolation is about -50dB in 50Ωsystems, becoming worse (approx-imately 20dB per decade) as frequency increases.Higher circuit impedances also degrade off-isolation.Adjacent channel attenuation is about 3dB above that of a bare IC socket and is entirely due to capacitive coupling.Pin NomenclatureThe MAX4617/MAX4618/MAX4619 are pin compatible with the industry-standard 74HC4051/74HC4052/74HC4053 and the MAX4581/MAX4582/MAX4583. In single-supply applications, they function identically and have identical logic diagrams, although these parts dif-fer electrically.The pin designations and logic diagrams in this data sheet conform to the original 1972 specifications pub-lished by RCA for the CD4051/CD4052/CD4053. These designations differ from the standard Maxim switch and mux designations found on other Maxim data sheets (including the MAX4051/MAX4052/MAX4053) and may cause confusion. Designers who feel more comfortable with Maxim’s standard designations are advised that the pin designations and logic diagrams on the MAX4051/MAX4052/MAX4053 data sheet may be freely applied to the MAX4617/MAX4618/MAX4619.Figure 1. Overvoltage Protection Using External Blocking DiodesM A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches 10______________________________________________________________________________________X = Don’t care*C not present on MAX4618.Note:Input and output pins are identical and interchangeable. Either may be considered an input or output; signals pass equallywell in either direction.MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches______________________________________________________________________________________11Figure 2. Address Transition Times______________________________________________Test Circuits/Timing DiagramsM A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches 12______________________________________________________________________________________Figure 3. Enable Switching Times_________________________________Test Circuits/Timing Diagrams (continued)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches______________________________________________________________________________________13Figure 4. Break-Before-Make IntervalFigure 5. Charge Injection_________________________________Test Circuits/Timing Diagrams (continued)M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches14______________________________________________________________________________________Figure 6. Off-Isolation, On-Loss, and CrosstalkFigure 7. Capacitance _________________________________Test Circuits/Timing Diagrams (continued)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches______________________________________________________________________________________15___________________Chip Information_Ordering Information (continued)TRANSISTOR COUNT: 244M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©1999 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.________________________________________________________Package Information。

General DescriptionThe MAX4711/MAX4712/MAX4713 are fault-protected,Rail-to-Rail ®, low-voltage analog switches featuring low on-resistance and guaranteed on-resistance flatness over the specified signal range. Due to the fault protection fea-ture the analog switch input (NO_ or NC_) and output (COM_) pins are not symmetrical. The fault protection fea-ture allows for the analog input to go beyond the plus or minus supplies without the device drawing excessive amounts of current from the analog inputs. When the ana-log inputs are driven beyond the supply rails when the switch is on, it will sense a fault and turn itself off and the analog switch output will be clamped to the same polarity supply as the input signal and will not go beyond the sup-ply rails. This feature protects any electronic circuitry con-nected to the output from excessive voltages present on the analog inputs.The MAX4711/MAX4712/MAX4713 are quad, single-pole/single-throw (SPST) analog switches. The MAX4711has four normally closed switches (NC), the MAX4712 has four normally open switches (NO), and the MAX4713 has two NO and two NC switches. Switching times are less than 125ns for t ON , and less than 80ns for t OFF . These switches operate from a single +2.7V to +11V supply or from dual ±2.7V to ±5.5V supplies. All digital inputs have +0.8V to +2.4V logic thresholds, ensuring both TTL and CMOS logic compatibility when using ±4.5V to ±5.5V or single +4.5V to +11V supplies.________________________ApplicationsCommunication Systems Battery-Operated Systems Signal Routing Test Equipment Data-AcquisitionIndustrial and Process Control Systems AvionicsRedundant/Backup SystemsFeatures♦Fault-Protected Analog Inputs ♦±12V Fault Protection with Power Off ♦±7V Fault Protection with ±5V Supplies ♦+12V and -7V Fault Protection with +5V Supply ♦+12V and -9V Fault Protection with +3V Supply ♦Fault-Protected Digital Inputs May Exceed V+Supply Rail ♦All Switches Off with Power Off ♦Rail-to-Rail Signal Handling♦Output Clamped to Appropriate Supply Voltages During Fault Condition ♦25Ω(max) R ON at +25°C♦1Ω(max) On-Resistance Match Between Channels ♦Single- and Dual-Supply Operation ♦Pin-Compatible with Industry-Standard MAX391/MAX392/MAX393♦TTL- and CMOS-Compatible Logic Inputs19-1907; Rev 1; 11/03MAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches________________________________________________________________Maxim Integrated Products 1Pin Configurations/FunctionalDiagrams/Truth TablesFor price, delivery, and to place orders,please contact Maxim Distribution at 1-888-629-4642,or visit Maxim’s website at .Ordering InformationOrdering Information continued at end of data sheet.Pin Configurations/Functional Diagrams/Truth Tables continued at end of data sheet.Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.M A X 4711/M A X 4712/M A X 4713Fault-Protected, Low-Voltage, Quad SPST Analog SwitchesABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS—Dual SuppliesStresses 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.V+...........................................................................-0.3V to +13V V-............................................................................-13V to +0.3V V+ to V-...................................................................-0.3V to +13V IN_...........................................................(V- + 12V) to (V- - 0.3V)COM_ (Note 1)......................................(V- - 0.3V) to (V+ + 0.3V)NO_, NC_ (Note 2)..................................(V+ - 12V) to (V- + 12V)Continuous Current into Any Terminal..............................±40mA Peak Current, into Any Terminal(pulsed at 1ms,10% duty cycle).................................±70mAContinuous Power Dissipation (T A = +70°C)16-Pin TSSOP (derate 5.70mW/°C above +70°C)...........457mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C).....696mW 16-Pin Plastic Dip (derate 10.53mW/°C above +70°C)...842mW Operating Temperature RangesMAX471_C_ E.....................................................0°C to +70°C MAX471_E_ E..................................................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CNote 1:COM_ pin is not fault-protected. Signals on COM_ exceeding V+ or V- are clamped by internal diodes. Limit forward diodecurrent to maximum current rating.Note 2:NO_ and NC_ pins are fault-protected. Signals on NO_ or NC_ exceeding -12V to +12V may damage device. These limitsapply with V+ = V- = 0.MAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)M A X 4711/M A X 4712/M A X 4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, V IH = +2.4V, V IL = +0.8V, GND = 0, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 3)ELECTRICAL CHARACTERISTICS—+5V Single SupplyMAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches_______________________________________________________________________________________5ELECTRICAL CHARACTERISTICS—+5V Single Supply (continued)M A X 4711/M A X 4712/M A X 4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—+3V Single Supply(V+ = +2.7V to +3.6V, V- = 0, V IH = +2.0V, V IL = +0.6V, GND = 0, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 3)MAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches_______________________________________________________________________________________7ELECTRICAL CHARACTERISTICS—+3V Single Supply (continued)(V+ = +2.7V to +3.6V, V- = 0, V IH = +2.0V, V IL = +0.6V, GND = 0, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 3)Note 4:∆R ON = ∆R ON (MAX) - ∆R ON (MIN)Note 5:Leakage parameters are 100% tested at maximum-rated temperature and with dual supplies. Leakage parameters areguaranteed by correlation at +25°C.Note 6:Off-isolation = 20 log 10[V COM_/(V NO_or V NC_)], V COM_= output, V NO_or V NC_= input to off switch. Note 7:Between any two switches.M A X 4711/M A X 4712/M A X 4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches 8_______________________________________________________________________________________Typical Operating Characteristics(V+ = +5V, V- = -5V, T A = +25°C, unless otherwise noted.)015105202530-5-1-2-4-312345ON-RESISTANCEvs. V COM (DUAL SUPPLIES)V COM (V)O N -R E S I S T A N C E (Ω)0510152025-5-1-3-2-412345ON-RESISTANCE vs. V COM AND TEMPERATURE (DUAL SUPPLIES)V COM (V)O N -R E S I S T A N C E (Ω)3020104050600 2.01.50.5 1.0 2.53.0 3.54.0 4.55.0ON-RESISTANCEvs. V COM (SINGLE SUPPLY)V COM (V)O N -R E S I S T A N C E (Ω)010520153025352.01.03.04.00.5 2.51.5 3.5 4.55.0ON-RESISTANCE vs. V COMAND TEMPERATURE (SINGLE SUPPLY)V COM (V)O N -R E S I S T A N C E (Ω)151052520454035305000.5 1.0 1.5 2.0 2.5 3.0ON-RESISTANCE vs. V COM AND TEMPERATURE (SINGLE SUPPLY)V COM (V)O N -R E S I S T A N C E (Ω)0.00010.010.00110.1100101000ON/OFF-LEAKAGE CURRENTvs. TEMPERATURETEMPERATURE (°C)L E A K A G E C U R R E N T (n A )-40-102060-30-200103040507080-1010030204050-6-20-4246CHARGE INJECTION vs. V COMV COM (V)C H A R G E (p C )0402080601001201401602.03.03.52.54.04.55.05.56.0TURN-ON/TURN-OFF TIMEvs. SUPPLY VOLTAGE (DUAL SUPPLIES)SUPPLY VOLTAGE (V)T I M E (n s )1005015030035025020040024567389101112TURN-ON/TURN-OFF TIMEvs. SUPPLY VOLTAGE (SINGLE SUPPLY)SUPPLY VOLTAGE (V)T I M E (n s )MAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches_______________________________________________________________________________________90302010405060708090100-4010-15356085TURN-ON/TURN-OFF TIMEvs. TEMPERATURE (DUAL SUPPLIES)TEMPERATURE (°C)T I M E (n s )10050200150300250350-4010-15356085TURN-ON/TURN-OFF TIMEvs. TEMPERATURE (SINGLE SUPPLY)TEMPERATURE (°C)T I M E (n s )-40-20-300-1030201040-40-2020406080SUPPLY CURRENT vs. TEMPERATUREV IN = 0 OR 5VTEMPERATURE (°C)S U P P L Y C U R R E N T (µA )020406080100120140160012345SUPPLY CURRENT vs. INPUT VOLTAGEINPUT VOLTAGE (V)S U P P L Y C U R R EN T (A )0.90.71.51.31.11.92.11.72.32.4 5.4 6.43.44.47.48.49.410.4LOGIC LEVEL THRESHOLD vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)L O G I C V O L T A G E (V )-120-40-50-20-300-1010FREQUENCY RESPONSEFREQUENCY (MHz)R E S P O N S E (d B )0.0111010010000.1-110-100-90-80-70-601µs/divFAULT TURN-ON DELAY ANDRECOVERY TIME2V/div 02µs/divFAULT TURN-ON DELAY ANDRECOVERY TIME2V/div2V/divMAX4711/12/13 toc17NC_INPUTCOM_OUTPUT (300Ω LOAD)Typical Operating Characteristics (continued)(V+ = +5V, V- = -5V, T A = +25°C, unless otherwise noted.)M A X 4711/M A X 4712/M A X 4713Detailed DescriptionThe MAX4711/MAX4712/MAX4713 differ considerably from traditional fault-protection switches, with several advantages. First, they are constructed with two paral-lel FET’s allowing very low on-resistance. Second, they allow signals on the NC_ or NO_ pins that are within or slightly beyond the supply rails to be passed through the switch to the COM terminal, allowing rail-to-rail sig-nal operation. Third, when a signal on NC_ or NO_exceeds the supply rails by about 150mV (a fault con-dition) the voltage on COM_ is limited to the same polarity supply voltage. Operation is identical for both fault polarities.During a fault condition, the NO_ or NC_ input becomes high impedance regardless of the switch state or load resistance. If the switch is on, the COM_output current is supplied from V+ or V- by the clamp FET’s that are connected from COM to each supply.These FET’s can typically source or sink up to 15mA.When power is removed, the fault protection is still in effect. In this case, the NO_ or NC_ terminals are a vir-tual open circuit. The fault can be up to ±12V.The COM_ pins are not fault-protected, they act as nor-mal CMOS switch terminals. If a voltage source is con-nected to any COM_ pin, it should be limited to the supply voltages. Exceeding the supply voltage willcause high currents to flow through the ESD-protected diodes, possibly damaging the device (see Absolute Maximum Ratings ).Pin CompatibilityThese switches have identical pinouts to common non-fault-protected CMOS switches. Care should be exer-cised while considering them for direct replacements in existing printed circuit boards since only the NO_ and NC_ pins of each switch are fault-protected.Internal ConstructionInternal construction is shown in Figure 1, with the ana-log signal paths shown in bold. A single NO switch is shown; the NC configuration is identical except the logic-level translator is inverting. The analog switch is formed by the parallel combination of N-channel FET (N1) and P-channel FET (P1), which are driven on and off simultaneously according to the input fault condition and the logic-level state.Normal OperationTwo comparators continuously compare the voltage on the NO_ (or NC_) pin with V+ and V-. When the signal on NO_ or NC_ is between V+ and V- the switch acts normally, with FETs N1 and P1 turning on and off in response to IN_ signals. The parallel combination of N1 and P1 forms a low-value resistor between NO_ (orFault-Protected, Low-Voltage,10______________________________________________________________________________________NC_) and COM_ so that signals pass equally well in either direction.Positive Fault ConditionWhen the signal on NO_ (or NC_) exceeds V+ by about 150mV, the high-fault comparator output is high, turn-ing off FETs N1 and P1. This makes the NO_ (or NC_)input high impedance regardless of the switch state. If the switch state is “off”, all FETs are turned off and both NO_ (or NC_) and COM_ are high impedance. If the switch state is “on”, clamp FET P2 is turned on, sourc-ing current from V+ to COM_.Negative Fault ConditionWhen the signal on NO_ (or NC_) exceeds V- by about 150mV, the low-fault comparator output is high, turning off FETs N1 and P1. This makes the NO_ (or NC_) input high impedance regardless of the switch state. If the switch state is “off”, all FETs are turned off and both NO_ (or NC_) and COM_ are high impedance. If the switch state is “on”, clamp FET N2 is turned on, sinking current from COM_ to V-.Transient Fault Response and RecoveryWhen a fast rise-time or fall-time transient on NC_ or NO_ exceeds V+ or V-, the output (COM_) follows the input to the supply rail with only a few nanoseconds delay. This delay is due to the switch on-resistance and circuit capacitance to ground. When the input transient returns to within the supply rails, however, there is a 700ns output recovery delay time. These values depend on the COM_ output resistance and capaci-tance, and are not production tested or guaranteed.The delays are not dependent on the fault amplitude.Higher COM_ output resistance and capacitance increase recovery times.COM_ and IN_ PinsFETs N2 and P2 can source about ±15mA from V+ or V- to COM_ in the fault condition. Ensure that if the COM_ pin is connected to a low-resistance load, the absolute maximum current rating of 40mA is never exceeded both in normal and fault conditions.MAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches______________________________________________________________________________________11Figure 1. Block DiagramM A X 4711/M A X 4712/M A X 4713The COM_ pins do not have fault protection. Reverse ESD-protection diodes are internally connected between COM_, and V+ and V-. If a signal on COM_exceeds V+ or V- by more than a diode drop, one of these diodes will conduct. The IN_ pin can exceed the positive supply voltage, but they can go below the neg-ative supply by only a diode drop. The maximum volt-age on these pins is 12V if operating from a single supply, regardless of the supply voltage (including 0volts), and if operating from dual supplies, the maxi-mum voltage is (V- + 12V).Fault-Protection Voltage and Power OffThe maximum fault voltage on the NC_ or NO_ pins is ±12V with power off.IN_ Logic-Level ThresholdsThe logic-level thresholds are CMOS and TTL compati-ble when using ±4.5V to ±5.5V or single +4.5V to +11V supplies. When using a +2.7V supply, the logic thresh-olds are V IH = 2.0V and V IL = 0.6V.Dual SuppliesThe MAX4711/MAX4712/MAX4713 operate with bipolar supplies between ±2.7V and ±5.5V. The V+ and V-supplies need not be symmetrical, but their difference should not exceed 11V.Single SupplyThe MAX4711/MAX4712/MAX4713 operate from a sin-gle supply between +2.7V and +11V when V- is con-nected to GND.Chip InformationTRANSISTOR COUNT: 463Fault-Protected, Low-Voltage, Quad SPST Analog SwitchesPin Configurations/Functional Diagrams/Truth Tables (continued)Ordering Information (continued)MAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches______________________________________________________________________________________13Test Circuits/Timing DiagramsFigure 2. Switch Turn-On/Turn-Off TimesFigure 4. Charge InjectionFigure 3. MAX4713 Break-Before-Make IntervalM A X 4711/M A X 4712/M A X 4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches 14______________________________________________________________________________________Figure 6. Frequency Response, Off-Isolation, and CrosstalkTest Circuits/Timing Diagrams (continued)Figure 5. COM_, NO_, NC_ CapacitanceMAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches______________________________________________________________________________________15T S S O P 4.40m m .E PSPackage Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)M A X 4711/M A X 4712/M A X 4713Fault-Protected, Low-Voltage, Quad SPST Analog Switches 16______________________________________________________________________________________Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)MAX4711/MAX4712/MAX4713Fault-Protected, Low-Voltage, Quad SPST Analog SwitchesMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________17©2003 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.P D I P N .E PSPackage Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)。

串行接口8位LED显示驱动器一、概述MAX7219/MAX7221是一种集成化的串行输入/输出共阴极显示驱动器,它连接微处理器与8位数字的7段数字LED显示，也可以连接条线图显示器或者64个独立的LED。

其上包括一个片上的B型BCD编码器、多路扫描回路，段字驱动器，而且还有一个8*8的静态RAM用来存储每一个数据。

只有一个外部寄存器用来设置各个LED的段电流。

MAX7221与SPI™、QSPI™以及MICROWIRE™相兼容，同时它有限制回转电流的段驱动来减少EMI（电磁干扰）。

一个方便的四线串行接口可以联接所有通用的微处理器。

每个数据可以寻址在更新时不需要改写所有的显示。

MAX7219/MAX7221同样允许用户对每一个数据选择编码或者不编码。

整个设备包含一个150μA的低功耗关闭模式，模拟和数字亮度控制，一个扫描限制寄存器允许用户显示1-8位数据，还有一个让所有LED发光的检测模式。

在应用时要求3V的操作电压或segment blinking，可以查阅MAX6951数据资料。

二、应用条线图显示仪表面板工业控制LED矩阵显示三、管脚配置四、功能特点●10MHz连续串行口●独立的LED段控制●数字的译码与非译码选择●150μA的低功耗关闭模式●亮度的数字和模拟控制●高电压中断显示●共阴极LED显示驱动●限制回转电流的段驱动来减少EMI（MAX7221）●SPI, QSPI, MICROWIRE串行接口（MAX7221）●24脚的DIP和SO封装八、功能图表九、时序图十、详细描述（一）MAX7219和MAX7221的不同之处MAX7219和MAX7221是相同的除了以下两点：（1）：MAX7219的段驱动有回流限制可以减少EMI；（2）：MAX7219的串行口和SPI完全兼容。

（二）串行地址格式对MAX7219来说，串行数据在DIN输入16位数据包，无论LOAD端处于何种状态，在时钟的上升沿数据均移入到内部16位移位寄存器。

MAX4721EUA
-40°C to +85°C 8 µMAX
—
MAX4721EBL-T* -40°C to +85°C 9 UCSP-9
ABP
MAX4722EUA
-40°C to +85°C 8 µMAX
—
MAX4722EBL-T* -40°C to +85°C 9 UCSP-9
ABQ
MAX4723EUA
*UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. See the UCSP reliability notice in the UCSP Reliability section of this data sheet for more information.

COM2
C NC1 V+ IN1
UCSP
MAX4723
1
2
3
A IN2 GND NC2
B COM1
COM2
C NO1 V+ IN1
UCSP
IN_ NO_ NC_ LOW OFF ON HIGH ON OFF
________________________________________________________________ Maxim Integrated Products 1
Infrared (15s) ...............................................................+220°C Vapor Phase (60s) .......................................................+215°C