KA337TU,KA337,KA337, 规格书,Datasheet 资料

©2001 Fairchild Semiconductor CorporationRev. 1.0.0Features•Output current in excess of 1.5A•Output voltage adjustable between -1.2V and - 37V •Internal thermal overload protection •Internal short circuit current limiting •Output transistor safe area compensation•Floating operation for high voltage applications •Standard 3-pin TO-220 packageDescriptionThe LM337 is a 3-terminal negative adjustable regulator. It supplies in excess of 1.5A over an output voltage range of -1.2V to - 37V . This regulator requires only two external resistor to set the output voltage. Included on the chip are current limiting, thermal overload protection and safe area compensation.TO-2201. Adj2. Input3. Output1LM3373-Terminal 1.5A Negative Adjustable RegulatorLM3372Absolute Maximum RatingsElectrical Characteristics(V I - V O = 5V, I O = 40mA, 0°C ≤ T J ≤ +125°C, P DMAX = 20W, unless otherwise specified)Note:1. Load and line regulation are specified at constant junction temperature. Change in V O due to heating effects must be taken intoaccount separately. Pulse testing with low duty is used.2. C ADJ , when used, is connected detween the adjustment pin and ground.ParameterSymbol Value Unit Input-Output Voltage Differential |V I - V O |40V Power DissipationP D Internally limitedW Operating Temperature Range T OPR 0 ~ +125°C Storage Temperature RangeT STG-65 ~+125°CParameterSymbolConditionsMin Typ.Max.Unit Line Regulation (Note1)R line T A = +25°C3V ≤ I V I - V O I ≤ 40V -0.010.04%/ V3V ≤ I V I - V O I ≤ 40V -0.020.07Load Regulation (Note1)R loadT A = +25°C10mA ≤ I O ≤ 0.5A -1550mV10mA ≤ I O ≤ 1.5A-15150Adjustable Pin Current I ADJ --50100µA Adjustable Pin Current Change∆I ADJT A =+ 25°C10mA ≤ I O ≤ 1.5A 3V ≤I V I - V O I ≤ 40V -25µA T A =+ 25°C-1.213-1.250-1.287Reference Voltage V REF 3V ≤ I V I - V O I ≤ 40V 10mA ≤ I O ≤ 1.5A -1.200-1.250-1.300V Temperature StabilityST T 0°C ≤ ΤJ ≤ +125°C -0.6-%Minimum Load Current to Maintain Regulation I L(MIN)3V ≤I V I - V O I ≤ 40V - 2.5103V ≤I V I - V O I ≤ 10V - 1.56mA Output Noisee N T A =+25°C 10Hz ≤f ≤10KHz -0.003-V/106Ripple Rejection Ratio RR V O = -10V, f = 120Hz -60-C ADJ = 10µF (Note2)6677-dB Long Term StabilityST T J = 125°C ,1000Hours-0.31%Thermal Resistance Junction to CaseR θJC--4-°C/ WLM337 Typical ApplicationFigure 1.Programmable Regulator•Ci is required if regulator is located more then 4 inches from power supply filter.A 1.0µF solid tantalum or 10µF aluminum electrolytic is recommended.Co is necessary for stability. A 1.0µF solid tantalum or 10µF aluminum electrolytic is recommended.•V O= -1.25V (1+R2/R1)3LM3374Mechanical DimensionsPackage4.50 ±0.209.90 ±0.201.52 ±0.100.80 ±0.102.40 ±0.2010.00 ±0.201.27 ±0.10ø3.60 ±0.10(8.70)2.80 ±0.1015.90 ±0.2010.08 ±0.3018.95M A X .(1.70)(3.70)(3.00)(1.46)(1.00)(45°)9.20 ±0.2013.08 ±0.201.30 ±0.101.30+0.10–0.050.50+0.10–0.052.54TYP [2.54 ±0.20]2.54TYP [2.54 ±0.20]TO-220LM337 Ordering InformationProduct Number Package Operating TemperatureLM337T TO-2200°C to + 125°C5LM3376/1/01 0.0m 001Stock#DSxxxxxxxx2001 Fairchild Semiconductor CorporationLIFE SUPPORT POLICYFAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:1.Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can bereasonably expected to result in a significant injury of the user.2. A critical component in any component of a life supportdevice or system whose failure to perform can bereasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.DISCLAIMERFAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANYLIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.。

KLDR, KLKRBLF, BLN, FLM, FLQ, KLK, KLKD LEC/LEY series:Accepts only Littelfuse Class CC fuses:CCMRKLDR, KLKRWeb ResourcesSample requests, downloadable CAD drawings and other technical information: w /leb/lec /lex /ley /let• Sports lighting and various outdoor illuminated signs • Boat electrical circuits, tractors/yard equipment and general outdoor circuit protection (such as traffic signals, alley lighting and electric wheelchairs)SpecificationsVoltage rating: 600 V Ampere rating: 30 AInterrupting rating: 200 kA rms symmetrical (with Class CC fuses)Approvals: LEB/LEX series: UL Recognized Miscellaneous Fuseholder per UL UL 4248 (File No. E14721) CSA Certified per C22.2, No. 39 (File No. LR7316) LEC/LEY series: U L Listed Class CC BranchCircuitFuseholder per UL 512 (File No. E14721)CSA Certified per C22.2, No. 39 (File No. LR7316)Insulating Boots• Molded from engineering-grade thermoplastics, WPB1 and WPB3 boots provide high resistance to corrosive environments • WPB1 contains one standard boot for A, B, C, D or J terminations • WPB3 offers one Y -pole boot for use with Y -pole termination• For watertight protection of non-breakaway Y -pole termination, order one WPB1 and one WPB3 bootOrdering InformationTo order Littelfuse in-line fuseholders and disconnects by part number, refer to the charts on the next page.Re comme nde d Crimping T oolsThe following crimping tools or equivalents may be used on either the non-breakaway or breakaway watertight in-line fuseholders.LEB - AA - SLittelfuse SeriesLoad Side/Terminal SizeBreakaway FeatureLine Side/Terminal SizeDimensions in inches1-Pole1-Pole Breakaway2-PoleA &B Crimp TerminalC &D Crimp TerminalJ TerminalY TerminalOrdering Information (1-Pole LEB/LEC and 2-Pole LEX/LEY)Ordering Information (Solid Neutral LET Fuseholders)Ordering Information (Terminals)Two-Pole Breakaway HolderDescriptionNew Littelfuse LEXT-YY-S and LEX-YYC-S series breakaway fuseholders meet state and federal highway commission safety standards requiring fuseholders to readily disconnect from power in case of a pole knockdown.The breakaway feature consists of a receptacle permanently attached to the power line and a fuseholder with matching terminals. If a knockdown occurs, the parts separate, leaving the energized conductor recessed and unexposed.Features/Benefits• L EXT -YY version has a permanently installed “neutral” slug to prevent the neutral from accidentally being fused • L EX-YY version allows for fusing of line-to-line loads or other applications requiring two fuses to disconnect under strain • Fiberglass polymer body resists damage from impact • F our “Y” type set-screw terminals accommodate a wide range of solid and stranded Cu or Al conductors • O-ring and terminal boots form watertight seal, preventing leakageSpecificationsPart numbers: LEXT-YY-S (Solid neutral) LEX-YYC-S Voltage Rating:600VAC/VDC Ampere Rating:30AInterrupting Rating:200 kA with Class CC Fuses Y Terminals: Tin Plated Copper w/ set screws Wire Size: 1 solid #12 to #8 or1 stranded #10 to #2Approvals: UL Recognized (File E14721)CSA Certified (File LR7316)Applications• Street lighting • Marinas• T ravel trailer parks and other locations where fuseholders may be exposed to physical strainWeb ResourcesSample requests, downloadable CAD drawings and other technical information: w /lext/lexOrdering InformationTwo-Pole Breakaway HolderRecommended FusesMidget Littelfuse types: BLF, BLN, FLM, FLQ, KLK, KLKDClass CC Littelfuse types: CCMR, KLDR, KLKRFour WPB3 insulating boots come standard with the LEXT-YY-S and LEX-YY-C-S fuseholders. Molded from non-conductive engineering grade thermoplastic to deliver a watertight seal in corrosive environments, they can be trimmed to the specific conductor size insuring a snug fit.。

1Features•Low-voltage and Standard-voltage Operation –2.7 (V CC = 2.7V to 5.5V) –1.8 (V CC = 1.8V to 3.6V)•Internally Organized 16,384 x 8 and 32,768 x 8 •Two-wire Serial Interface•Schmitt Trigger, Filtered Inputs for Noise Suppression •Bidirectional Data Transfer Protocol•1 MHz (5V), 400 kHz (2.7V , 2.5V) and 100 kHz (1.8V) Compatibility •Write Protect Pin for Hardware and Software Data Protection •64-byte Page Write Mode (Partial Page Writes Allowed) •Self-timed Write Cycle (5 ms Max) •High Reliability–Endurance: One Million Write Cycles –Data Retention: 40 Years•Extended Temperature and Lead-free/Halogen-free Devices Available•8-lead JEDEC PDIP, 8-lead JEDEC and EIAJ SOIC, 8-lead MAP , 8-lead TSSOP , 8-lead SAP and 8-ball dBGA2 Packages•Die Sales: Wafer Form, Waffle Pack, and Bumped WafersDescriptionThe AT24C128/256 provides 131,072/262,144 bits of serial electrically erasable and programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8bits each. The device’s cascadable feature allows up to 4 devices to share a common Two-wire bus. The device is optimized for use in many industrial and commercial appli-cations where low power and low voltage operation are essential. The devices are available in space-saving 8-lead JEDEC PDIP , 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead MAP (24C128), 8-lead TSSOP , 8-lead SOIC Array Package and 8-ball dBGA2 packages. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 3.6V) versions.Table 1. Pin ConfigurationPin NameFunctionA0 - A1Address Inputs SDA Serial Data SCL Serial Clock Input WP Write Protect NC No Connect GNDGround8-lead SAPBottom View8-lead PDIP8-lead SOIC8-ball dBGA2Bottom View8-lead TSSOPBottom View2AT24C128/2560670T–SEEPR–3/07Figure 1. Block DiagramAbsolute Maximum Ratings*Operating T emperature.................................–55°C to +125°C *NOTICE:Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent dam-age to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Storage T emperature....................................–65°C to +150°C Voltage on Any Pinwith Respect to Ground....................................–1.0V to +7.0V Maximum Operating Voltage ..........................................6.25V DC Output Current........................................................5.0 mA3AT24C128/2560670T–SEEPR–3/07Pin DescriptionSERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device.SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may be wire-ORed with any number of other open-drain or open collector devices.DEVICE/ADDRESSES (A1, A0): The A1 and A0 pins are device address inputs that are hard-wired or left not connected for hardware compatibility with other AT24CXX devices. When the pins are hardwired, as many as four 128K/256K devices may be addressed on a single bus system (device addressing is discussed in detail under the Device Addressing section). If the pins are left floating, the A1 and A0 pins will be internally pulled down to GND if the capacitive coupling to the circuit board V CC plane is <3 pF. If coupling is >3 pF, Atmel recommends con-necting the address pins to GND.WRITE PROTECT (WP): The write protect input, when connected to GND, allows normal write operations. When WP is connected high to V CC , all write operations to the memory are inhib-ited. If the pin is left floating, the WP pin will be internally pulled down to GND if the capacitive coupling to the circuit board V CC plane is <3 pF. If coupling is >3 pF, Atmel recommends con-necting the pin to GND.Memory OrganizationAT24C128/256, 128K/256K SERIAL EEPROM: The 128K/256K is internally organized as 256/512 pages of 64-bytes each. Random word addressing requires a 14/15-bit data word address.4AT24C128/2560670T–SEEPR–3/07Table 2. Pin Capacitance (1)Note:1.This parameter is characterized and is not 100% tested.Table 3. DC Characteristics (1)Notes:1.V IL min and V IH max are reference only and are not tested.2.The A T24C128/256 bearing the process letter “B” on the package (the mark is located in the lower right corner on the top-side of the package) are approved for operation in the extended temperature range.Applicable over recommended operating range from T A = 25°C, f = 1.0 MHz, V CC = +1.8V.Symbol Test ConditionMax Units Conditions C I/O Input/Output Capacitance (SDA)8pF V I/O = 0V C IN Input Capacitance (A 0, A 1, SCL)6pFV IN = 0VApplicable over recommended operating range from: T AI = –40°C to +85°C, V CC = +1.8V to +5.5V; T AE = –40°C to +125°C (2), V CC = +2.7V to +5.5V(unless otherwise noted).Symbol Parameter Test ConditionMin TypMax Units V CC1Supply Voltage 1.8 3.6V V CC2Supply Voltage 2.5 5.5V V CC3Supply Voltage 4.55.5V I CC1Supply Current V CC = 5.0V READ at 400 kHz 1.0 2.0mA I CC2Supply Current V CC = 5.0V WRITE at 400 kHz 2.0 3.0mA I SB1Standby Current (1.8V option)V CC = 1.8V V IN = V CC or V SS0.2µAV CC = 3.6V 2.0I SB2Standby Current (2.5V option)V CC = 2.5V V IN = V CC or V SS 0.5µA V CC = 5.5V 6.0I SB3Standby Current (5.0V option)V CC = 4.5 - 5.5V V IN = V CC or V SS6.0µA I LI Input Leakage Current V IN = V CC or V SS 0.10 3.0µA I LO Output Leakage CurrentV OUT = V CC or V SS0.053.0µA V IL Input Low Level (1)–0.6V CC x 0.3V V IH Input High Level (1)V CC x 0.7V CC + 0.5V V OL2Output Low Level V CC = 3.0V I OL = 2.1 mA 0.4V V OL1Output Low LevelV CC = 1.8VI OL = 0.15 mA0.2V5AT24C128/2560670T–SEEPR–3/07Table 4. AC Characteristics – Industrial TemperaturesNotes:1.This parameter is characterized and is not 100% tested.2.AC measurement conditions:R L (connects to V CC ): 1.3 k Ω (2.5V , 5V), 10 k Ω (1.8V)Input pulse voltages: 0.3 V CC to 0.7 V CC Input rise and fall times: ≤ 50 nsInput and output timing reference voltages: 0.5 V CC3.The Write Cycle Time of 5 ms only applies to the A T24C128/256 devices bearing the process letter “B” on the package (themark is located in the lower right corner on the top side of the package).4.The A T24C128/256 bearing the process letter “B” in the package (the mark is located in the lower right corner on the topside of the package), guarantees 1 million write cycle endurance (1.8 – 3.6V).Applicable over recommended operating range from T AI = –40°C to +85°C, V CC = +1.8V to +5.5V, CL = 100 pF (unless oth-erwise noted). Test conditions are listed in Note 2.Symbol Parameter1.8-volt2.5-volt5.0-voltUnits MinMax MinMax MinMax f SCL Clock Frequency, SCL 1004001000kHz t LOW Clock Pulse Width Low 4.7 1.30.4µs t HIGH Clock Pulse Width High 4.00.60.4µs t AA Clock Low to Data Out Valid 0.1 4.50.050.90.050.55µs t BUF Time the bus must be free before a new transmission can start (1) 4.7 1.30.5µs t HD.ST A Start Hold Time 4.00.60.25µs t SU.ST A Start Set-up Time 4.70.60.25µs t HD.DA T Data In Hold Time 000µs t SU.DAT Data In Set-up Time 200100100ns t R Inputs Rise Time (1) 1.00.30.3µs t F Inputs Fall Time (1)300300100ns t SU.STO Stop Set-up Time 4.70.60.25µs t DH Data Out Hold Time 1005050ns t WRWrite Cycle Time 20 or 5(3)10 or 5(3)10 or 5(3)ms Endurance (1)25°C, Page Mode100k or 1,000,000(4)Write Cycles6AT24C128/2560670T–SEEPR–3/07Table 5. AC Characteristics (5) – Extended TemperaturesNotes:1.This parameter is characterized and is not 100% tested.2.AC measurement conditions:R L (connects to V CC ): 1.3 k Ω (2.5V , 5V), 10 k Ω (1.8V)Input pulse voltages: 0.3 V CC to 0.7 V CC Input rise and fall times: ≤ 50 nsInput and output timing reference voltages: 0.5 V CC3.The Write Cycle Time of 5 ms only applies to the A T24C128/256 devices bearing the process letter “B” on the package (themark is located in the lower right corner on the top side of the package).4.The A T24C128/256 bearing the process letter “B” in the package (the mark is located in the lower right corner on the topside of the package), guarantees 1 million write cycle endurance (1.8 – 3.6V).5.The A T24C128/256 bearing the process letter “B” on the package (the mark is located in the lower right corner on the top-side of the package) are approved for operation in the extended temperature range.Applicable over recommended operating range from T AE = –40°C to +125°C, V CC = +2.7V to +5.5V, CL = 100 pF (unless otherwise noted). Test conditions are listed in Note 2.Symbol Parameter2.7-volt5.0-voltUnits MinMax MinMax f SCL Clock Frequency, SCL 4001000kHz t LOW Clock Pulse Width Low 1.30.4µs t HIGH Clock Pulse Width High 0.60.4µs t AA Clock Low to Data Out Valid0.050.90.050.55µs t BUF Time the bus must be free before a new transmission can start (1) 1.30.5µs t HD.ST A Start Hold Time 0.60.25µs t SU.ST A Start Set-up Time 0.60.25µs t HD.DA T Data In Hold Time 00µs t SU.DAT Data In Set-up Time 100100ns t R Inputs Rise Time (1)0.30.3µs t F Inputs Fall Time (1)300100ns t SU.STO Stop Set-up Time 0.60.25µs t DH Data Out Hold Time 5050ns t WRWrite Cycle Time 10 or 5(3)10 or 5(3)ms Endurance (1)25°C, Page Mode100k or 1,000,000(4)Write Cycles7AT24C128/2560670T–SEEPR–3/07Device OperationCLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external device. Data on the SDA pin may change only during SCL low time periods (see Figure 4 on page 9). Data changes during SCL high periods will indicate a start or stop condition as defined below.START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which must precede any other command (see Figure 5 on page 9).STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition. After a read sequence, the stop command will place the EEPROM in a standby power mode (see Fig-ure 5 on page 9).ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words. The EEPROM sends a zero during the ninth clock cycle to acknowl-edge that it has received each word.STANDBY MODE: The AT24C128/256 features a low power standby mode which is enabled:a) upon power-up and b) after the receipt of the STOP bit and the completion of any internal operations.MEMORY RESET: After an interruption in protocol, power loss or system reset, any two-wire part can be reset by following these steps: (a) Clock up to 9 cycles, (b) look for SDA high in each cycle while SCL is high and then (c) create a start condition as SDA is high.8AT24C128/2560670T–SEEPR–3/07Figure 2. Bus Timing (SCL: Serial Clock, SDA: Serial Data I/O ®)Figure 3. Write Cycle Timing (SCL: Serial Clock, SDA: Serial Data I/O)Note:1.The write cycle time t WRis the time from a valid stop condition of a write sequence to the end of the internal clear/write cycle.9AT24C128/2560670T–SEEPR–3/07Figure 4. Data ValidityFigure 5. Start and Stop DefinitionFigure 6.Output Acknowledge10AT24C128/2560670T–SEEPR–3/07DeviceAddressingThe 128K/256K EEPROM requires an 8-bit device address word following a start condition to enable the chip for a read or write operation (see Figure 7 on page 11). The device address word consists of a mandatory one, zero sequence for the first five most significant bits as shown. This is common to all two-wire EEPROM devices.The 128K/256K uses the two device address bits A1, A0 to allow as many as four devices on the same bus. These bits must compare to their corresponding hardwired input pins. The A1and A0 pins use an internal proprietary circuit that biases them to a logic low condition if the pins are allowed to float.The eighth bit of the device address is the read/write operation select bit. A read operation is initiated if this bit is high and a write operation is initiated if this bit is low.Upon a compare of the device address, the EEPROM will output a zero. If a compare is not made, the device will return to a standby state.DATA SECURITY: The AT24C128/256 has a hardware data protection scheme that allows the user to write protect the whole memory when the WP pin is at V CC .WriteOperationsBYTE WRITE: A write operation requires two 8-bit data word addresses following the device address word and acknowledgment. Upon receipt of this address, the EEPROM will again respond with a zero and then clock in the first 8-bit data word. Following receipt of the 8-bit data word, the EEPROM will output a zero. The addressing device, such as a microcontroller,then must terminate the write sequence with a stop condition. At this time the EEPROM enters an internally-timed write cycle, t WR , to the nonvolatile memory. All inputs are disabled during this write cycle and the EEPROM will not respond until the write is complete (see Figure 8 on page 11).PAGE WRITE: The 128K/256K EEPROM is capable of 64-byte page writes.A page write is initiated the same way as a byte write, but the microcontroller does not send a stop condition after the first data word is clocked in. Instead, after the EEPROM acknowledges receipt of the first data word, the microcontroller can transmit up to 63 more data words. The EEPROM will respond with a zero after each data word received. The microcontroller must ter-minate the page write sequence with a stop condition (see Figure 9 on page 12).The data word address lower 6 bits are internally incremented following the receipt of each data word. The higher data word address bits are not incremented, retaining the memory page row location. When the word address, internally generated, reaches the page boundary, the following byte is placed at the beginning of the same page. If more than 64 data words are transmitted to the EEPROM, the data word address will “roll over” and previous data will be overwritten. The address “roll over” during write is from the last byte of the current page to the first byte of the same page.ACKNOWLEDGE POLLING: Once the internally-timed write cycle has started and the EEPROM inputs are disabled, acknowledge polling can be initiated. This involves sending a start condition followed by the device address word. The read/write bit is representative of the operation desired. Only if the internal write cycle has completed will the EEPROM respond with a zero, allowing the read or write sequence to continue.分销商库存信息:ATMELAT24C128-10TU-1.8AT24C128-10TU-2.7AT24C128N-10SU-1.8AT24C128N-10SU-2.7AT24C256-10TU-1.8AT24C256-10TU-2.7AT24C256N-10SU-1.8AT24C256N-10SU-2.7AT24C128-10PU-1.8AT24C128W-10SU-1.8AT24C128-10PU-2.7AT24C128N-10SU-2.7SL383AT24C128W-10SU-2.7AT24C256-10PU-1.8AT24C256-10PU-2.7AT24C256W-10SU-1.8AT24C256W-10SU-2.7AT24C128-10TU-1.8 SL383AT24C128Y1-10YU-1.8 AT24C128-10TU-2.7 SL383AT24C128Y1-10YU-1.8SL383。

BC337-16/25/40BC338-16/25/40NPNPlastic-EncapsulateTransistorsFeaturesx Capable of 0.625Watts of Power Dissipation.x Collector-current 0.8Ax Collector-base Voltage :V CBO =50V(BC337) , V CBO =30V(BC338) Revision: B 2012/01/20omp onents20736Marilla Street Chatsworth! "# $ % ! "#TMMicro Commercial Componentswww.mccsemi .com1 of 3• Lead Free Finish/RoHS Compliant ("P" Suffix designates RoHS Compliant. See ordering information)/Revision: B 2012/01/20TMMicro Commercial Componentswww.mccsemi .com2 of 3/Revision: B 2012/01/20Micro Commercial Componentswww.mccsemi .com3 of 3Part Number-BP Bulk: 100Kpcs/CartonOrdering Information :***IMPORTANT NOTICE***Micro Commercial Components Corp. reserve s the right to make changes without further notice to any product herein to make corrections, modifications , enhancements , improvements , or other changes . Micro Commercial Components Corp . does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights ,nor the rights of others . The user of products in such applications shall assume all risks of such use and will agree to hold Micro Commercial Components Corp . and all the companies whose products are represented on our website, harmless against all damages.***LIFE SUPPORT***MCC's products are not authorized for use as critical components in life support devices or systems without the express writtenapproval of Micro Commercial Components Corporation.***CUSTOMER AWARENESS***Counterfeiting of semiconductor parts is a growing problem in the industry. Micro Commercial Components (MCC) is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. MCC strongly encourages customers to purchase MCC parts either directly from MCC or from Authorized MCC Distributors who are listed by country on our web page cited below . Products customers buy either from MCC directly or from Authorized MCC Distributors are genuine parts, have full traceability, meet MCC's quality standards for handling and storage. MCC will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. MCC is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors.DevicePackingPart Number-AP Ammo Packing: 20Kpcs/Carton 3/分销商库存信息:MICRO-COMMERICAL-COBC337-25-AP BC337-40-AP BC337-16-AP BC337-AP。

©2011 Fairchild Semiconductor CorporationRev. 1.0.4Features•Output Current in Excess of 100mA•Output Adjustable Between 1.2V and 37V •Internal Thermal Overload Protection •Internal Short Circuit Current Limiting •Output Transistor Safe Area Compensation•Floating Operation For High V oltage ApplicationsDescriptionThe KA317L is a 3-terminal adjustable positive voltage regulator capable of supplying in excess of 100mA over an output voltage range of 1 .2V to 37V . This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage.TO-921. Adj2. Output3. Input1KA317L3-Terminal 0.1A Positive Adjustable RegulatorKA317L2Absolute Maximum RatingsElectrical Characteristics(V I - V O = 5V, I O = 40mA, 0°C ≤ T J ≤ +125°C, P DMAX = 625mW, unless otherwise specified)Note:1. Load and Line regulation are specified at constant junction temperature. Change in V O due to heating effects must be takeninto account separately. Pulse testing with low duty cycle is used.ParameterSymbol Value Unit Input-Output Voltage Differential V I - V O 40V Power DissipationP D Internally limitedW Operating Junction Temperature Range T j 0 ~ +125°C Storage Temperature RangeT STG-65 ~ +125°CParameterSymbol ConditionsMin.Typ.Max.Unit Line Regulation (Note1)R lineT A = +25°C3V ≤ V I − V O ≤ 40V -0.010.04%/V3V ≤ V I − V O ≤ 40V -0.020.07Load Regulation (Note1)R loalT A = +25°C10mA ≤ I O ≤ 100mA V O ≤ 5V V O ≥ 5V--50.1250.5mV %/V O 10mA ≤ I O ≤ 100mA V O ≤ 5V V O ≥ 5V--200.3701.5mV %/V O Adjustment Pin Current I ADJ --50100μA Adjustment Pin Current ChangeΔI ADJ3V ≤ V I - V O ≤ 40V 10mA ≤ I O ≤ 100mA P D < P DMAX -0.25μAReference Voltage V REF 3V < V I - V O < 40V 10mA ≤ I O ≤ 100mA P D ≤ P DMAX1.20 1.25 1.30V Temperature Stability ST T --0.7-%Minimum Load Current to Maintain RegulationI L(MIN)V I - V O = 40V- 3.510mAMaximum Output CurrentI O(MAX)V I - V O ≤ 15V, P D < P DMAX100200-mAV I - V O ≤ 40VP D < P DMAX , T A = +25°C 2550-RMS Noise, % of V OUT e N T A = +25°C10Hz < f < 10kHz -0.003-%/V O Ripple Rejection RR V O = 10V, f = 120Hz without C ADJ C ADJ = 10uF-666580--dB dB Long-Term StabilitySTT J = +125°C, 1000Hours-0.3-%KA317L3Typical ApplicationFigure 1.5V Electronic Shutdown RegulatorD1 protects the device during an input short circuit.Figure 2.Slow Turn-On RegulatorFigure 3.Current RegulatorKA317L120OutputInput1KKSP2222720TTL CONTROL1.0uF1N4002D1V ADJV OMINIMUM V O = 1.25V+KA317LOutputInputKSP290750K1N40011.0uF+V ADJV O240R2OutputInputR2V OI ADJV ADJR1I OKA317LI OMAX VREFR1----------------⎝⎠⎛⎞I ADJ 1.25V R1---------------≅+=IOMAX VREF R1R2+----------------------⎝⎠⎛⎞=I ADJ + 1.25VR1R2+----------------------≅5mA IO500mA<<Mechanical DimensionsPackageTO-92410/17/11 0.0m 001Stock#DSxxxxxxxx© 2011 Fairchild Semiconductor CorporationLIFE SUPPORT POLICYFAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:1.Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can bereasonably expected to result in a significant injury of the user.2. A critical component in any component of a life supportdevice or system whose failure to perform can bereasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.DISCLAIMERFAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANYLIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.Ordering InformationProduct NumberPackage Operating TemperatureKA317LZTO-920°C to +125°C。

BC-337GPS Receiver with Compact Flash InterfaceUser Manual1.BC-337 at a glance2. IntroductionThe BC-337 is a GPS receiver with Compact Flash type I interface and it has a built-in high sensitivity antenna for tracking signal. Based on the SiRF star III high performance GPS Chip Set with very high sensitivity (Tracking Sensitivity: -159 dBm), it has an extremely fast TTFF (Time To First Fix) capability at the low signal level. The BC-337 is well suited to system integration and users who use PDA ornotebook PC. It satisfies a wide variety of applications, including car navigation, personal navigation of touring devices, tracking and marine navigation purpose. Users can simply plug it into a PDA or other type of handheld PC running with suitable mapping and routing software for navigation.2.1. PackageBefore you start up, make sure that your package includes the following items. If any items are missing or damaged, contact your dealer immediately.• GPS Receiver (BC-337)• CD (including User Manual, Testing Program, Driver for PCMCIA card slot of Notebook PC) * Optional Accessory: CF-to-PCMCIA adapter* Optional Accessory: External Antenna2.2. LED FunctionLED off Receiver power offLED on Searching the signalLED flashing Position is fixed2.3. External AntennaBasically, you don’t need external antenna to perform GPS positioning with BC-337; it already has a built-in antenna. The only condition that you need external antenna is when BC-337 unit can not “see”the sky, For instance, when you are in a car, or any environment that GPS signal is blocked, theexternal GPS antenna will help to receive better GPS signal.Plug the external antenna with MMCX connector to the plug on BC-337. Place the magnetic external antenna on the roof of the car or the outdoor open-space, and make sure not to put it upside down.That is, the magnetic side is the bottom side, and the upper side must face to the sky in order toreceive better signal.Note: Hold the antenna connector while you plug the external antenna into the BC-337 or unplug the external antenna from the BC-337. Do not pull it by the cable line.3. SpecificationElectrical Characteristics (Receiver)Frequency: L1, 1575.42MHzChannel: 20 channels all-in-view trackingChipset: SiRF Star IIIInterfaceInterface: Compact Flash Type IAccuracyPosition Accuracy:10 meters, 2D RMS, (No SA).5 meters, 2D RMS, (WAAS enabled).DatumDatum: WGS-84Acquisition RateHot Start: 1 sec. averageWarm Start: 38 sec. averageCold Start: 42 sec. averageReacquisition Time: 0.1 sec. averageProtocolGPS output data: NMEA 0183 protocol, supports command GGA (1 sec), GSA (1 sec),GSV (5 sec), RMC (1 sec), (VTG and GLL are optional).Baud Rate: 4800 bps,N,8,1Dynamic ConditionMaximum Altitude: 18,000 meters (60,000 feet) max.Maximum Velocity: 515 meter/sec. (1,000 knots) max.PowerVoltage: DC 3.3 V ± 10%Power consumption: 90 mAPhysical characteristicsAntenna Type: Built in antennaExternal Antenna Interface: MMCX (Optional)Dimension: 83 mm x 42.8 mm x 13.3 mmLED Indicator: GPS fix status.(blinking light: GPS is fixed, solid light: GPS is not fixed.)TemperatureOperating Temperature: -10°C to +70°CStorage Temperature: -40°C to +85°COperation Humidity: 95%, Non- Condensing4. InstallationThe BC-337 GPS receiver supports plug and play. For PDAFor Notebook PC1. Plug BC-337 GPS receiver into the Compact Flash slot of your PDA.1. Plug BC-337 GPS receiver into PCMCIA card slot on notebook PC through a general “Compact Flash to PCMCIA adapter”.2. Run the suitable mapping/navigationsoftware, select the correct COM port and set the baud rate to 4800,N,8,1.2. Install the “Compact Flash to PCMCIA” driver forWindows 98, ME, 2000 or XP. (Please see section 3.2 for details.)Usually the default COM port is COM2, but it depends on your PDA type. You can use the testing program (can be found within the CD) to detect the COM port that the BC-337 is currently using.3. Run the suitable mapping/navigation software, select the correct COM port and set baud rate to 4800,N,8,1.4.1. Test the BC-337 GPS receiver for PDANote: Before you do the following test, please refer to GPS Information User Manual for installing the “GPSinfo” testing program. You can find the program and Manual in CD.( “GPSInfo.exe“ and “gpsinfo_menu_Eng_rev Ver 1.02.pdf”)The testing program only supports the Microsoft Windows CE & Pocket PC based PDA platform.1. Plug BC-337 into your PDA.2. In your PDA, tap “Start”, “Programs” and tap “GPSinfo” icon.3. You must select COM port (CF-CARD-GENERIC), Baud Rate (4800) and tap the [Start GPS]button to start receiving GPS data. You can use this testing program to check the GPS datareceived by BC-337.Here is the description of “GPSinfo” testing program as follows:Date and Time informationSpeed and Direction2D or 3DHorizontal Dilution of PrecisionPositional Dilution of PrecisionLatitude and LongitudeThe number in above is the signal intensity.The number in below is the satellite number.For more detail about this GPS Info testing program,please refer to the GPS Information User Manual,you can find it in the CD.(“gpsinfo_menu_Eng_rev Ver 1.02.pdf”)4.2. Install the “Compact Flash to PCMCIA” driverInsert the BC-337 into the “CF to PCMCIA adapter” and insert the adapter into your notebook PC. The BC-337 GPS receiver supports the plug and play feature, so your notebook PC will detect itautomatically.Setup for Windows 98, ME1. The system will recognize the device.It will show the “Add New HardwareWizard” dialog box. Select“Automatic search for a betterdriver”, insert the driver CD into theCD-ROM drive and click “Next” button.2. The system will search the driver ofthis device and automatically copy thenecessary files into the system.3. Click “Finish” button to complete theinstallation.Setup for Windows 20001. The system will recognize the device.It will show the “Found NewHardware Wizard” dialog box. Pleaseinsert the driver CD into the CD-ROMdrive and click “Next” button.2. Select “Search for a suitable driverfor my device” and click “Next”button.3. Select “CD-ROM drives” and click“Next” button.copy the necessary files into system.installation.Setup for Windows XP1. The system will recognize the device. Itwill show the “Found New HardwareWizard” dialog box. Please select“Install the software automatically”,insert the driver CD into the CD-ROMdrive and click “Next” button.2. Please click “Continue Anyway” button.The system will search the driver of thisdevice and automatically copy thenecessary files into the system.3. Click “Finish” button to complete theinstallation.4.3. Test the BC-337 GPS receiver for Notebook PC1. From desktop, double click the “Gpsinfo”icon to start the GPS Informationprogram.2. Select the correct COM Port and set theBaud Rate to 4800.3. Click “Start GPS” button to start receivingthe GPS data.4. You will see the GPS data running in thewindow.5. Also you can switch to GPSinfo tab to seethe satellite information.For more detail about this GPS Info testingprogram, please refer to the GPS InformationUser Manual, you can find it in the CD.(“gpsinfo_menu_Eng_rev Ver 1.02.pdf”)6. If BC-337 can not receive the GPS data,please check if you select the correct COM Port. You can click the “Scan Com Port ”button to let the program scan for you.7. A “Scan Ports ” dialog box will appear and theprogram starts to scan and find the device. When the scan is completed, click “OK ” button.(If the scan is failed, please repeat the step 6and do it again.)8. The program will automatically set the correctCOM port number which it found the GPS Receiver.A tip to check the COM port of BC-3371. From desktop, right click on “MyComputer” icon and click “Properties”.2. In the “System Properties” dialog box,click “Hardware” tab, and then click“Device Manager” button.3. In the “Device Manager” dialog box,expand the “Ports” group and you canfind a Compact Flash device and its COM port number.FCC NoticesThis device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:(1)This device may not cause harmful interference, and(2)This device must accept any interference received, including interference that maycause undesired operation .FCC RF Exposure requirements:This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter.NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT. SUCH MODIFICATIONS COULD VOID THE USER'S AUTHORITY TO OPERATE THE EQUIPMENT.。

Bezeichnung :description := Start of winding Marking = Inductance code33% Umgebungstemperatur / temperature:+20°C100% SnMST 04-10-11MST 03-12-10RT 03-03-03MST02-03-27JH 00-12-06NameDatum / dateIt is recommended that the temperature of the part does not exceed 125°C under worst case operating conditions.Anbindung an Elektrode / soldering wire to plating:Sn/Ag/Cu - 96.5/3.0/0.5%Draht / wire:2SFBW 155°CUmgebungstemp. / ambient temperature: -40°C - + 85°C Freigabe erteilt / general release:Kunde / customerWürth Elektronik....................................................................................................................................................................Unterschrift / signature Ferrit/ferrite F Werkstoffe & Zulassungen / material & approvals :G Eigenschaften / general specifications :D Prüfgeräte / test equipment :E Testbedingungen / test conditions :Basismaterial / base material:Betriebstemp. / operating temperature: -40°C - + 125°C D-74638 Waldenburg · Max-Eyth-Strasse 1 - 3 · Germany · Telefon (+49) (0) 7942 - 945 - 0 · Telefax (+49) (0) 7942 - 945 - 400Geprüft / checked ..........................................................................................................................Kontrolliert / approvedWürth Elektronik eiSos GmbH & Co. KG744770133SPEICHERDROSSEL WE-PDPOWER-CHOKE WE-PDArtikelnummer / part number : Luftfeuchtigkeit / humidity:HP 4274 A für/for L und/and Q HP 34401 A für/for I DC und/and R DCÄnderung / modificationVersion 1Version 2Version 3Version 4Version 5 Datum / dateEndoberfläche / finishing electrode:• MarkingRoHS compliantLFdescription :MST 04-10-11MST 03-12-10RT 03-03-03MST02-03-27JH 00-12-06NameDatum / dateH Induktivitätskurve / Inductance curve :POWER-CHOKE WE-PDDATUM / DATE : 2004-10-11Kontrolliert / approvedDatum / dateUnterschrift / signature Würth ElektronikWürth Elektronik eiSos GmbH & Co. KGD-74638 Waldenburg · Max-Eyth-Strasse 1 - 3 · Germany · Telefon (+49) (0) 7942 - 945 - 0 · Telefax (+49) (0) 7942 - 945 - 400Freigabe erteilt / general release:Kunde / customer..................................................................................................................................................................................................................................................................................Geprüft / checked Version 4Version 5Änderung / modificationVersion 1Version 2Version 3a 330,0± 0,5mmb 20,20± 0,2mm+ 0,5- 1,0d 100,0± 0,2mmMST 04-10-11MST 03-12-10RT 03-03-03MST02-03-27JH 00-12-06NameDatum / dateRollenspezifikation / Reel specification:Freigabe erteilt / general release:Kunde / customerc 13,00mm....................................................................................................................................................................Datum / dateUnterschrift / signature Würth Elektronik..........................................................................................................................Würth Elektronik eiSos GmbH & Co. KGGeprüft / checked Kontrolliert / approvedD-74638 Waldenburg · Max-Eyth-Strasse 1 - 3 · Germany · Telefon (+49) (0) 7942 - 945 - 0 · Telefax (+49) (0) 7942 - 945 - 400Änderung / modificationVersion 1Version 2Version 3Version 4Version 5The force for tearing off cover tape is 10 to 130 grams in arrow direction165 to 180°feeding directionThis electronic component is designed and developed with the intention for use in general electronics equipments. Before incorporating the components into any equipments in the field such as aerospace, aviation, nuclear control, submarine, transportation, (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc. where higher safety and reliability are especially required or if there is possibility of direct damage or injury to human body. In addition, even electronic component in general electronic equipments, when used in electrical circuits that require high safety, reliability functions or performance, the sufficient reliability evaluation-check for the safety must be performed before use. It is essential to give consideration when to install a protective circuit at the design stage.分销商库存信息: WURTH-ELECTRONICS 744770133。

©2001 Fairchild Semiconductor CorporationRev. 1.0.1Features•3A / 3.3V Output low dropout voltage regulator •TO220 Full-Mold package (4PIN)•Overcurrent protection, Thermal shutdown•Overvoltage protection, Short-Circuit protection •With output disable functionDescriptionThe KA378R33 is a low-dropout voltage regulator suitable for various electronic equipments. It provide constant volt-age power source with TO-220 4 lead full mold package. Dropout voltage of KA378R33 is below 0.5V in full rated current(3A). This regulator has various function such as peak current protection, thermal shut down, overvoltage pro-tection and output disable function.TO-220F-4L1. Vin2. Vo3. GND4. Vdis1KA378R33Low Dropout Voltage RegulatorKA378R33Absolute Maximum RatingsParameter Symbol Value Unit RemarkInput Voltage Vin35V-Disable Voltage Vdis35V-Output Current Io 3.0A-Power Dissipation 1Pd1 1.5W No Heatsink Power Dissipation 2 Pd215W With Heatsink Junction Temperature Tj150°C-Operating Temperature Topr-20~80°C-Electrical Characteristics(Vin=5V, Io=1.5A, Ta=25 °C, unless otherwise specified)Parameter Symbol Conditions Min.Typ.Max.Unit Output Voltage Vo- 3.22 3.3 3.38V Load Regulation Rload5mA < Io < 3A-0.1 2.0% Line Regulation Rline4V < Vin < 10V-0.5 2.5% Ripple Rejection Ratio RR note14555-dB Dropout Voltage Vdrop Io = 3A--0.5V Disable Voltage High VdisH Output Active 2.0--V Disable Voltage Low VdisL Output Disabled--0.8V Disable Bias Current High IdisH Vdis = 2.7V--20µA Disable Bias Current Low IdisL Vdis = 0.4V---0.4mA Quiescent Current Iq Io = 0A--10mANote:1.These parameters, although guaranteed, are not 100% tested in production.2KA378R333Typical Perfomance CharacteristicsFigure 1.Output Voltage vs. Input Voltage Figure 3.Output Voltage vs. Disable Voltage Figure 5.Quiescent Current vs. Temperature(Tj)Figure 2.Quiescent Current vs. Input VoltageFigure 4.Output Voltage vs. Temperature(Tj)Figure 6.Dropout Voltage vs. Junction TemperatureKA378R334Typical Perfomance Characteristics (continued)Figure 7.Power Dissipation vs. Temperature(Ta)Figure 8. Overcurrent Protection Characteristics(Typical Value)KA378R33 Typical ApplicationFigure 1.Application Circuit•Ci is required if regulator is located an appreciable distance from power supply filter.•Co improves stability and transient response.(Co > 47µF)5KA378R33Mechanical DimensionsPackageDimensions in millimetersTO-220F-4L6KA378R33 Ordering InformationProduct Number Package Operating TemperatureKA378R33TO-220F-4L-20°C to + 80°C7KA378R334/26/01 0.0m 001Stock#DSxxxxxxxx© 2001 Fairchild Semiconductor CorporationLIFE SUPPORT POLICYFAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:1.Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can bereasonably expected to result in a significant injury of the user.2. A critical component in any component of a life supportdevice or system whose failure to perform can bereasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.DISCLAIMERFAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANYLIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.。

337美卡纸克重厚度对照表一、引言337美卡纸是一种常用的纸张类型，用于制作各种印刷品和包装材料。

在选择337美卡纸时，了解其克重和厚度的对照关系非常重要。

本文将为大家介绍337美卡纸克重厚度对照表，帮助大家更好地理解和选择337美卡纸。

二、337美卡纸克重厚度对照表下表是337美卡纸克重厚度对照表的详细内容：克重（g/m²）厚度（mm）60 0.0770 0.0980 0.1090 0.11100 0.12120 0.14140 0.16160 0.18180 0.20200 0.22220 0.24240 0.26260 0.28280 0.30300 0.32三、337美卡纸的特点1. 337美卡纸具有较好的机械强度和耐磨性，适用于制作名片、宣传单页等需要经常携带和折叠的印刷品。

2. 337美卡纸的表面光滑，适合进行高品质的印刷和覆膜处理，使印刷品更加精美。

3. 337美卡纸的色彩稳定性较好，可以保证印刷品长时间不褪色。

4. 337美卡纸可裱糊、折叠和粘合等加工处理，适合制作各种形状的包装盒和纸质袋子。

四、如何选择337美卡纸在选择337美卡纸时，我们可以根据具体需求来确定合适的克重和厚度。

以下是一些建议：1. 对于需要折叠的印刷品，如宣传单页，建议选择80克重的337美卡纸，厚度为0.10mm，适合折叠后不易破损。

2. 对于需要经常携带的印刷品，如名片，建议选择60或70克重的337美卡纸，厚度分别为0.07mm和0.09mm，较轻便易携带。

3. 对于需要进行高品质印刷的印刷品，如高端宣传册，建议选择160克重以上的337美卡纸，厚度为0.18mm以上，以保证印刷品的质感和观感。

五、其他注意事项1. 在设计印刷品时，要考虑337美卡纸的克重和厚度对于折叠、裱糊等加工处理的影响，以确保印刷品的质量和使用寿命。

2. 在购买337美卡纸时，可以参考337美卡纸克重厚度对照表，选择符合需求的纸张规格。