74HCLSHCTF系列芯片的区别

74系列芯片精解 - HC/LS/HCT/F系列芯片的区别- -74HC/LS/HCT/F系列芯片的区别1、LS是低功耗肖特基，HC是高速COMS。

LS的速度比HC略快。

HCT输入输出与LS兼容，但是功耗低；F是高速肖特基电路；2、LS是TTL电平，HC是COMS电平。

3、LS输入开路为高电平，HC输入不允许开路， hc 一般都要求有上下拉电阻来确定输入端无效时的电平。

LS 却没有这个要求4、LS输出下拉强上拉弱，HC上拉下拉相同。

5、工作电压不同，LS只能用5V，而HC一般为2V到6V；6、电平不同。

LS是TTL电平，其低电平和高电平分别为0.8和V2.4，而CMOS在工作电压为5V时分别为0.3V和3.6V，所以CMOS可以驱动TTL，但反过来是不行的7、驱动能力不同，LS一般高电平的驱动能力为5mA，低电平为20mA；而CMOS的高低电平均为5mA；8、CMOS器件抗静电能力差，易发生栓锁问题，所以CMOS的输入脚不能直接接电源。

其实现在的很多器件都已优化了，并不完全局限于原来固有的缺点，所以设计时还应看一下厂家的手册为好。

在购买器件的时候要看价格。

如果对功耗要求比较高，尽量选用hc或者hct 的，注意驱动能力。

下表以245为例：关于Tplh和Tphl的定义：＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝74、74HC、74LS系列芯片资料系列电平典型传输延迟ns 最大驱动电流(-Ioh/Lol)mA AHC CMOS 8.5 -8/8AHCT COMS/TTL 8.5 -8/8HC COMS 25 -8/8HCT COMS/TTL 25 -8/8ACT COMS/TTL 10 -24/24F TTL 6.5 -15/64ALS TTL 10 -15/64LS TTL 18 -15/24注:同型号的74系列、74HC系列、74LS系列芯片,逻辑功能上是一样的.74LSxx的使用说明如果找不到的话,可参阅74xx或74HCxx的使用说明.有些资料里包含了几种芯片,如74HC161资料里包含了74HC160、74HC161、74HC162、74HC163四种芯片的资料.找不到某种芯片的资料时,可试着查看一下临近型号的芯片资料.7400 QUAD 2-INPUT NAND GATES与非门7401 QUAD 2-INPUT NAND GATES OC 与非门7402 QUAD 2-INPUT NOR GATES 或非门7403 QUAD 2-INPUT NAND GATES与非门7404 HEX INVERTING GATES反向器7406 HEX INVERTING GATES HV 高输出反向器7408 QUAD 2-INPUT AND GATE与门7409 QUAD 2-INPUT AND GATES OC与门7410 TRIPLE 3-INPUT NAND GATES与非门7411 TRIPLE 3-INPUT AND GATES 与门74121 ONE-SHOT WITH CLEAR 单稳态74132 SCHMITT TRIGGER NAND GATES 触发器与非门7414 SCHMITT TRIGGER INVERTERS触发器反向器74153 4-LINE TO 1 LINE SELECTOR 四选一74155 2-LINE TO 4-LINE DECODER译码器74180 PARITY GENERATOR/CHECKER奇偶发生检验74191 4-BIT BINARY COUNTER UP/DOWN计数器7420 DUAL 4-INPUT NAND GATES双四输入与非门7426 QUAD 2-INPUT NAND GATES与非门7427 TRIPLE 3-INPUT NOR GATES 三输入或非门7430 8-INPUT NAND GATES 八输入端与非门7432 QUAD 2-INPUT OR GATES二输入或门7438 2-INPUT NAND GATE BUFFER 与非门缓冲器7445 BCD-DECIMAL DECODER/DRIVER BCD译码驱动器7474 D-TYPE FLIP-FLOP D型触发器7475 QUAD LATCHES 双锁存器7476 J-K FLIP-FLOPJ-K触发器7485 4-BIT MAGNITUDE COMPARATOR 四位比较器7486 2-INPUT EXCLUSIVE OR GATES 双端异或门74HC00 QUAD 2-INPUT NAND GATES双输入与非门74HC02 QUAD 2-INPUT NOR GATES 双输入或非门74HC03 2-INPUT OPEN-DRAIN NAND GATES与非门74HC04 HEX INVERTERS六路反向器74HC05 HEX INVERTERS OPEN DRAIN 六路反向器74HC08 2-INPUT AND GATES双输入与门74HC107 J-K FLIP-FLOP WITH CLEARJ-K触发器74HC109A J-K FLIP-FLOP W/PRESET J-K触发器74HC11 TRIPLE 3-INPUT AND GATES 三输入与门74HC112 DUAL J-K FLIP-FLOP 双J-K触发器74HC113 DUAL J-K FLIP-FLOP PRESET 双JK触发器74HC123A RETRIGGERABLE MONOSTAB 可重触发单稳74HC125 TRI-STATE QUAD BUFFERS四个三态门74HC126 TRI-STATE QUAD BUFFERS六三态门74HC132 2-INPUT TRIGGER NAND 施密特触发与非门74HC133 13-INPUT NAND GATES 十三输入与非门74HC137 3-TO-8 DECODERS W/LATCHES 3-8线译码器74HC138 3-8 LINE DECODER 3线至8线译码器74HC139 2-4 LINE DECODER2线至4线译码器74HC14 TRIGGERED HEX INVERTER 六触发反向器74HC147 10-4 LINE PRIORITY ENCODER 10-4编码器74HC148 8-3 LINE PRIORITY ENCODER 8-3编码器74HC149 8-8 LINE PRIORITY ENCODER 8-8编码器74HC151 8-CHANNEL DIGITAL MUX 8通道多路器74HC153 DUAL 4-INPUT MUX双四输入多路器74HC154 4-16 LINE DECODER 4线至16线译码器74HC155 2-4 LINE DECODER 2线至4线译码器74HC157 QUAD 2-INPUT MUX四个双端多路器74HC161 BINARY COUNTER二进制计数器74HC163 DECADE COUNTERS 十进制计数器74HC164 SERIAL-PARALLEL SHIFT REG 串入并出74HC165 PARALLEL-SERIAL SHIFT REG 并入串出74HC166 SERIAL-PARALLEL SHIFT REG 串入并出74HC173 TRI-STATE D FLIP-FLOP三态D触发器74HC174 HEX D FLIP-FLOP W/CLEAR六D触发器74HC175 HEX D FLIP-FLOP W/CLEAR六D触发器74HC181 ARITHMETIC LOGIC UNIT 算术逻辑单元74HC182 LOOK AHEAD CARRYGENERATR进位发生器74HC190 BINARY UP/DN COUNTER 二进制加减计数器74HC191 DECADE UP/DN COUNTER 十进制加减计数器74HC192 DECADE UP/DN COUNTER 十进制加减计数器74HC193 BINARY UP/DN COUNTER 二进制加减计数器74HC194 4BIT BI-DIR SHIFT 4位双向移位寄存器74HC195 4BIT PARALLEL SHIFT 4位并行移位寄存器74HC20 QUAD 4-INPUT NAND GATE 四个四入与非门74HC221A NON-RETRIG MONOSTAB不可重触发单稳74HC237 3-8 LINE DECODER 地址锁3线至8线译码器74HC242/243 TRI-STAT TRANSCEIVER三态收发器74HC244 OCTAL 3-STATE BUFFER八个三态缓冲门74HC245 OCTAL 3-STATE TRANSCEIVER 三态收发器74HC251 8-CH 3-STATE MUX 8路3态多路器74HC253 DUAL 4-CH 3-STATE MUX4路3态多路器74HC257 QUAD 2-CH 3-STATE MUX4路3态多路器74HC258 2-CH 3-STATE MUX 2路3态多路器74HC259 3-8 LINE DECODER8位地址锁存译码器74HC266A 2-INPUT EXCLUSIVE NOR GATE 异或非74HC27 TRIPLE 3-INPUT NOR GATE三个3输入或非门74HC273 OCTAL D FLIP-FLOP CLEAR8路D触发器74HC280 9BIT ODD/EVEN GENERATOR 奇偶发生器74HC283 4BIT BINARY ADDER CARRY 四位加法器74HC299 3-STATE UNIVERSAL SHIFT 三态移位寄存74HC30 8-INPUT NAND GATE8输入端与非门74HC32 QUAD 2-INPUT OR GATE 四个双端或门74HC34 NON-INVERTER 非反向器74HC354 8-CH 3-STATE MUX 8路3态多路器74HC356 8-CH 3-STATE MUX 8路3态多路器74HC365 HEX 3-STATE BUFFER六个三态缓冲门74HC366 3-STATE BUFFER INVERTER 缓冲反向器74HC367 3-STATE BUFFER INVERTER 缓冲反向器74HC368 3-STATE BUFFER INVERTER 缓冲反向器74HC373 3-STATE OCTAL D LATCHES 三态D型锁存器74HC374 3-STATE OCTAL D FLIPFLOP 三态D触发器74HC3934-BIT BINARY COUNTER 4位二进制计数器74HC4016 QUAD ANALOG SWITCH 四路模拟量开关74HC4020 14-Stage Binary Counter 14输出计数器74HC4017 Decade Counter/Divider with 10 Decoded Outputs十进制计数器带10个译码输出端74HC4040 12 Stage Binary Counter 12出计数器74HC4046 PHASE LOCK LOOP相位监测输出器74HC4049 LEVEL DOWN CONVERTER 电平变低器74HC4050 LEVEL DOWN CONVERTER 电平变低器74HC4051 8-CH ANALOG MUX8通道多路器74HC4052 4-CH ANALOG MUX4通道多路器74HC4053 2-CH ANALOG MUX2通道多路器74HC4060 14-STAGE BINARY COUNTER14阶BIN计数74HC4066 QUAD ANALOG MUX四通道多路器74HC4075 TRIPLE 3-INPUT OR GATE 3输入或门74HC42 BCD TO DECIMALBCD转十进制译码器74HC423A RETRIGGERABLE MONOSTAB 可重触发单稳74HC4511 BCD-7 SEG DRIVER/DECODER 7段译码器74HC4514 4-16 LINE DECODER4至16线译码器74HC4538A RETRIGGERAB MONOSTAB可重触发单稳74HC4543 LCD BCD-7 SEG LCD用的BCD-7段译码驱动74HC51 AND OR GATE INVERTER 与或非门74HC521 8BIT MAGNITUDE COMPARATOR 判决定路74HC533 3-STATE D LATCH三态D锁存器74HC534 3-STATE D FLIP-FLOP三态D型触发器74HC540 3-STATE BUFFER三态缓冲器74HC541 3-STATE BUFFER INVERTER三态缓冲反向器74HC58 DUAL AND OR GATE 与或门74HC589 3STATE 8BIT SHIFT 8位移位寄存三态输出74HC594 8BIT SHIFT REG8位移位寄存器74HC595 8BIT SHIFT REG8位移位寄存器出锁存74HC597 8BIT SHIFT REG8位移位寄存器入锁存74HC620 3-STATE TRANSCEIVER反向3态收发器74HC623 3-STATE TRANSCEIVER 八路三态收发器74HC640 3-STATE TRANSCEIVER反向3态收发器74HC643 3-STATE TRANSCEIVER 八路三态收发器74HC646 NON-INVERT BUS TRANSCEIVER 总线收发器74HC648 INVERT BUS TRANCIVER反向总线收发器74HC688 8BIT MAGNITUDE COMPARATOR 8位判决电路74HC7266 2-INPUT EXCLUSIVE NOR GATE 异或非门74HC73 DUAL J-K FLIP-FLOP W/CLEAR 双JK触发器74HC74A PRESET/CLEAR D FLIP-FLOP 双D触发器74HC75 4BIT BISTABLE LATCH4位双稳锁存器74HC76 PRESET/CLEAR JK FLIP-FLOP双JK触发器74HC85 4BIT MAGNITUDE COMPARATOR4位判决电路74HC86 2INPUT EXCLUSIVE OR GATE2输入异或门74HC942 BAUD MODEM 300BPS低速调制解调器74HC943 300 BAUD MODEM300BPS低速调制解调器74LS00 QUAD 2-INPUT NAND GATES与非门74LS02 QUAD 2-INPUT NOR GATES 或非门74LS03 QUAD 2-INPUT NAND GATES与非门74LS04 HEX INVERTING GATES反向器74LS05 HEX INVERTERS OPEN DRAIN 六路反向器74LS08 QUAD 2-INPUT AND GATE与门74LS09 QUAD 2-INPUT AND GATES OC与门74LS10 TRIPLE 3-INPUT NAND GATES与非门74LS109 QUAD 2-INPUT AND GATES OC与门74LS11 TRIPLE 3-INPUT AND GATES 与门74LS112 DUAL J-K FLIP-FLOP 双J-K触发器74LS113 DUAL J-K FLIP-FLOP PRESET 双JK触发器74LS114 NEGATIVE J-K FLIP-FLOP 负沿J-K触发器74LS122 Retriggerable Monostab可重触发单稳74LS123 Retriggerable Monostable 可重触发单稳74LS125 TRI-STATE QUAD BUFFERS四个三态门74LS13 QUAL 4-in NAND TRIGGER 4输入与非触发器74LS160 BCD DECADE 4BIT BIN COUNTERS计数器74LS136 QUADRUPLE 2-INPUT XOR GATE异或门74LS138 3-8 LINE DECODER 3线至8线译码器74LS139 2-4 LINE DECODER 2线至4线译码器74LS14 TRIGGERED HEX INVERTER 六触发反向器74HC147 10-4 LINE PRIORITY ENCODER 10-4编码器74HC148 8-3 LINE PRIORITY ENCODER 8-3编码器74HC149 8-8 LINE PRIORITY ENCODER 8-8编码器74LS151 8-CHANNEL DIGITAL MUX 8通道多路器74LS153 DUAL 4-INPUT MUX双四输入多路器74LS155 2-4 LINE DECODER 2线至4线译码器74LS156 2-4 LINE DECODER/DEMUX2-4译码器74LS157 QUAD 2-INPUT MUX四个双端多路器74LS158 2-1 LINE MUX2-1线多路器74LS160A BINARY COUNTER 二进制计数器74LS161A BINARY COUNTER 二进制计数器74LS162A BINARY COUNTER 二进制计数器74LS163A DECADE COUNTERS十进制计数器74LS164 SERIAL-PARALLEL SHIFT REG 串入并出74LS168 BI-DIRECT BCD TO DECADE 双向计数器74LS169 4BIT UP/DN BIN COUNTER 四位加减计数器74LS173 TRI-STATE D FLIP-FLOP三态D触发器74LS174 HEX D FLIP-FLOP W/CLEAR六D触发器74LS175 HEX D FLIP-FLOP W/CLEAR六D触发器74LS190 BINARY UP/DN COUNTER 二进制加减计数器74LS191 DECADE UP/DN COUNTER 十进制加减计数器74LS192 DECADE UP/DN COUNTER 十进制加减计数器74LS193 BINARY UP/DN COUNTER 二进制加减计数器74LS194A 4BIT BI-DIR SHIFT4位双向移位寄存器74LS195A 4BIT PARALLEL SHIFT4位并行移位寄存器74LS20 QUAD 4-INPUT NAND GATE 四个四入与非门74LS21 4-INPUT AND GATE 四输入端与门74LS240 OCTAL 3-STATE BUFFER八个三态缓冲门74LS244 OCTAL 3-STATE BUFFER八个三态缓冲门74LS245 OCTAL 3-STATE TRANSCEIVER 三态收发器74LS253 DUAL 4-CH 3-STATE MUX4路3态多路器74LS256 4BIT ADDRESS LATCH四位可锁存锁存器74LS257 QUAD 2-CH 3-STATE MUX4路3态多路器74LS258 2-CH 3-STATE MUX 2路3态多路器74LS27 TRIPLE 3-INPUT NOR GATES 三输入或非门74LS279 QUAD R-S LATCHES四个RS非锁存器74LS28 QUAD 2-INPUT NOR BUFFER 四双端或非缓冲74LS283 4BIT BINARY ADDER CARRY 四位加法器74LS30 8-INPUT NAND GATES 八输入端与非门74LS32 QUAD 2-INPUT OR GATES二输入或门74LS352 4-1 LINE SELECTOR/MUX 4-1线选择多路器74LS365 HEX 3-STATE BUFFER六个三态缓冲门74LS367 3-STATE BUFFER INVERTER 缓冲反向器74LS368A 3-STATE BUFFER INVERTER缓冲反向器74LS373 OCT LATCH W/3-STATE OUT三态输出锁存器74LS76 Dual JK Flip-Flop w/set2个JK触发器74LS379 QUAD PARALLEL REG 四个并行寄存器74LS38 2-INPUT NAND GATE BUFFER 与非门缓冲器74LS390 DUAL DECADE COUNTER 2个10进制计数器74LS393 DUAL BINARY COUNTER2个2进制计数器74LS42 BCD TO DECIMAL BCD转十进制译码器74LS48 BCD-7 SEGBCD-7段译码器74LS49 BCD-7 SEGBCD-7段译码器74LS51 AND OR GATE INVERTER 与或非门74LS540 OCT Buffer/Line Driver8路缓冲驱动器74LS541 OCT Buffer/LineDriver 8路缓冲驱动器74LS74 D-TYPE FLIP-FLOP D型触发器74LS682 8BIT MAGNITUDE COMPARATOR 8路比较器74LS684 8BIT MAGNITUDE COMPARATOR8路比较器74LS75 QUAD LATCHES 双锁存器74LS83A 4BIT BINARY ADDER CARRY 四位加法器74LS85 4BIT MAGNITUDE COMPARAT4位判决电路74LS86 2INPUT EXCLUSIVE OR GATE 2输入异或门74LS90 DECADE/BINARY COUNTER 十/二进制计数器74LS95B 4BIT RIGHT/LEFT SHIFT 4位左右移位寄存74LS688 8BIT MAGNITUDE COMPARAT8位判决电路74LS136 2-INPUT XOR GATE2输入异或门74LS651 BUS TRANSCEIVERS总线收发器74LS653 BUS TRANSCEIVERS总线收发器74LS670 3-STATE 4-BY-4 REG3态4-4寄存器74LS73A DUAL J-K FLIP-FLOP W/CLEAR 双JK触发器。