Copyright74620 - 74699copyright

LM/CD 74LS600 series TTL IC's: 74LS620 to 74LS699 and 74HCT600 series


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These "LS" chips are basically low power drain CMOS versions of the TTL range.
Please note, we do not stock all the listed chips on this page, however we can
order these in, depending on availability, "lead" times. These useful 74LSxxx building
blocks of logic IC's function are on lower voltages, eg: typically from 4.5V ~ 5.6V D.C.

Email us :sales@unitechelectronics.com

The TTL building blocks 74LS620 and 74HCT620 series of TTL LS/HCT logic IC's.



    74620
  8-bit 3-state inverting bus transceiver. Two enable pins control
  output enables, one active high and one active low.
      +---+--+---+
  GAB |1  +--+ 20| VCC
   A1 |2       19| /GBA
   A2 |3       18| B1
   A3 |4       17| B2
   A4 |5  74   16| B3
   A5 |6  620  15| B4
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

    74621   8-bit open-collector noninverting bus transceiver. Two enable pins
  control the output enables, one active high and one active low.

      +---+--+---+
  GAB |1  +--+ 20| VCC
   A1 |2       19| /GBA
   A2 |3       18| B1
   A3 |4       17| B2
   A4 |5  74   16| B3
   A5 |6  621  15| B4
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

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    74623   8-bit 3-state noninverting bus transceiver.Two enable pins
  control output enables, one active high and one active low.

      +---+--+---+
  GAB |1  +--+ 20| VCC
   A1 |2       19| /GBA
   A2 |3       18| B1
   A3 |4       17| B2
   A4 |5  74   16| B3
   A5 |6  623  15| B4
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

    74638   8-bit 3-state/open-collector inverting bus transceiver.   Enable and direction pins control output enables.

      +---+--+---+
  DIR |1  +--+ 20| VCC
   A1 |2       19| /OE
   A2 |3       18| B1
   A3 |4       17| B2
   A4 |5  74   16| B3
   A5 |6  638  15| B4
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

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    74639   8-bit 3-state/open-collector noninverting bus transceiver.
  Enable and direction pins control output enables.

      +---+--+---+
  DIR |1  +--+ 20| VCC
   A1 |2       19| /OE
   A2 |3       18| B1
   A3 |4       17| B2
   A4 |5  74   16| B3
   A5 |6  639  15| B4
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

    74640   8-bit 3-state inverting bus transceiver.   Enable and direction pins control output enables.

      +---+--+---+             +---+---*---+---+
  DIR |1  +--+ 20| VCC         |/EN|DIR| A | B |
   A1 |2       19| /EN         +===+===*===+===+
   A2 |3       18| B1          | 1 | X | Z | Z |
   A3 |4       17| B2          | 0 | 0 |/B | Z |
   A4 |5  74   16| B3          | 0 | 1 | Z |/A |
   A5 |6  640  15| B4          +---+---*---+---+
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

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    74641   8-bit 3-state noninverting bus transceiver.
  Enable and direction pins control output enables.

      +---+--+---+
  DIR |1  +--+ 20| VCC
   A1 |2       19| /OE
   A2 |3       18| B1
   A3 |4       17| B2
   A4 |5  74   16| B3
   A5 |6  641  15| B4
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

    74642   8-bit open-collector inverting bus transceiver.
  Enable and direction pins control output enables.

      +---+--+---+
  DIR |1  +--+ 20| VCC
   A1 |2       19| /OE
   A2 |3       18| B1
   A3 |4       17| B2
   A4 |5  74   16| B3
   A5 |6  642  15| B4
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

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    74643   8-bit 3-state inverting/noninverting bus transceiver.
  Enable and direction pins control output enables.

      +---+--+---+             +---+---*---+---+
  DIR |1  +--+ 20| VCC         |/EN|DIR| A | B |
   A1 |2       19| /EN         +===+===*===+===+
   A2 |3       18| B1          | 1 | X | Z | Z |
   A3 |4       17| B2          | 0 | 0 | B | Z |
   A4 |5  74   16| B3          | 0 | 1 | Z |/A |
   A5 |6  643  15| B4          +---+---*---+---+
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

    74645   8-bit 3-state noninverting bus transceiver.
  Enable and direction pins control output enables.

      +---+--+---+
  DIR |1  +--+ 20| VCC
   A1 |2       19| /OE
   A2 |3       18| B1
   A3 |4       17| B2
   A4 |5  74   16| B3
   A5 |6  645  15| B4
   A6 |7       14| B5
   A7 |8       13| B6
   A8 |9       12| B7
  GND |10      11| B8
      +----------+

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    74646   8-bit 3-state noninverting registered transceiver.

      +---+--+---+
  CAB |1  +--+ 24| VCC
  SAB |2       23| CBA
  DIR |3       22| SBA
   A1 |4       21| /OE
   A2 |5       20| B1
   A3 |6   74  19| B2
   A4 |7  646  18| B3
   A5 |8       17| B4
   A6 |9       16| B5
   A7 |10      15| B6
   A8 |11      14| B7
  GND |12      13| B8
      +----------+

    74648   8-bit 3-state inverting registered transceiver.

      +---+--+---+
  CAB |1  +--+ 24| VCC
  SAB |2       23| CBA
  DIR |3       22| SBA
   A1 |4       21| /OE
   A2 |5       20| B1
   A3 |6   74  19| B2
   A4 |7  648  18| B3
   A5 |8       17| B4
   A6 |9       16| B5
   A7 |10      15| B6
   A8 |11      14| B7
  GND |12      13| B8
      +----------+

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    74651   8-bit 3-state inverting registered transceiver.

      +---+--+---+
  CAB |1  +--+ 24| VCC
  SAB |2       23| CBA
  GAB |3       22| SBA
   A1 |4       21| /GBA
   A2 |5       20| B1
   A3 |6   74  19| B2
   A4 |7  651  18| B3
   A5 |8       17| B4
   A6 |9       16| B5
   A7 |10      15| B6
   A8 |11      14| B7
  GND |12      13| B8
      +----------+

    74652   8-bit 3-state non-inverting registered transceiver.

      +---+--+---+
  CAB |1  +--+ 24| VCC
  SAB |2       23| CBA
  GAB |3       22| SBA
   A1 |4       21| /GBA
   A2 |5       20| B1
   A3 |6   74  19| B2
   A4 |7  652  18| B3
   A5 |8       17| B4
   A6 |9       16| B5
   A7 |10      15| B6
   A8 |11      14| B7
  GND |12      13| B8
      +----------+

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    74653   8-bit 3-state / open-collector inverting registered transceiver.

      +---+--+---+
  CAB |1  +--+ 24| VCC
  SAB |2       23| CBA
  GAB |3       22| SBA
   A1 |4       21| /GBA
   A2 |5       20| B1
   A3 |6   74  19| B2
   A4 |7  653  18| B3
   A5 |8       17| B4
   A6 |9       16| B5
   A7 |10      15| B6
   A8 |11      14| B7
  GND |12      13| B8
      +----------+

    74654   8-bit 3-state / open-collector noninverting registered transceiver.

      +---+--+---+
  CAB |1  +--+ 24| VCC
  SAB |2       23| CBA
  GAB |3       22| SBA
   A1 |4       21| /GBA
   A2 |5       20| B1
   A3 |6   74  19| B2
   A4 |7  654  18| B3
   A5 |8       17| B4
   A6 |9       16| B5
   A7 |10      15| B6
   A8 |11      14| B7
  GND |12      13| B8
      +----------+

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    74657   8-bit 3-state noninverting bus transceiver with parity generator/checker.
  Enable and direction pins control output enables.

         +---+--+---+
     DIR |1  +--+ 24| /OE
      A1 |2       23| B1
      A2 |3       22| B2
      A3 |4       21| B3
      A4 |5       20| B4
      A5 |6   74  19| GND
     VCC |7  657  18| GND
      A6 |8       17| B5
      A7 |9       16| B6
      A8 |10      15| B7
    O//E |11      14| B8
  /ERROR |12      13| PAR
         +----------+

    74666   8-bit 3-state transparent latch with readback, set and reset.

        +---+--+---+
  /OERB |1  +--+ 24| VCC
   /OE1 |2       23| /OE2
     D1 |3       22| Q1
     D2 |4       21| Q2
     D3 |5       20| Q3
     D4 |6   74  19| Q4
     D5 |7  666  18| Q5
     D6 |8       17| Q6
     D7 |9       16| Q7
     D8 |10      15| Q8
   /RST |11      14| /SET
    GND |12      13| LE
        +----------+

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    74669   4-bit synchronous binary up/down counter with load and ripple carry output.

       +---+--+---+
  U//D |1  +--+ 16| VCC
   CLK |2       15| /RCO
    P0 |3       14| Q0
    P1 |4   74  13| Q1
    P2 |5  169  12| Q2
    P3 |6       11| Q3
  /ENP |7       10| /ENT
   GND |8        9| /LOAD
       +----------+

    74670   4 x 4-bit 3-state dual-port register file.

      +---+--+---+
   D2 |1  +--+ 16| VCC
   D3 |2       15| D1
   D4 |3       14| WA0
  RA1 |4   74  13| WA1
  RA0 |5  670  12| /WR
   Q4 |6       11| /RD
   Q3 |7       10| Q1
  GND |8        9| Q2
      +----------+

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    74673   16-bit 3-state universal shift register with storage register,
  reset and a true 16-bit rotate function.

           +---+--+---+
       /CE |1  +--+ 24| VCC
      /CLK |2       23| P15
   R//W S0 |3       22| P14
  /RRST S1 |4       21| P13
   L//S S2 |5       20| P12
    D0/Q15 |6   74  19| P11
        P0 |7  673  18| P10
        P1 |8       17| P9
        P2 |9       16| P8
        P3 |10      15| P7
        P4 |11      14| P6
       GND |12      13| P5
           +----------+

    74674   16-bit 3-state universal shift register with 16-bit rotate function.

          +---+--+---+         +---+---+---*----------------------------+
      /CE |1  +--+ 24| VCC     |/CE| S1| S0| Function                   |
     /CLK |2       23| P15     +===+===+===*============================+
  R//W S0 |3       22| P14     | 1 | X | X | hold, P0..15=Z             |
          |4       21| P13     | 0 | X | 0 | serial-in parallel out     |
  L//S S1 |5       20| P12     | 0 | 0 | 1 | serial&parallel out rotate |
   D0/Q15 |6   74  19| P11     | 0 | 1 | 1 | parallel load              |
       P0 |7  674  18| P10     +---+---+---*----------------------------+
       P1 |8       17| P9
       P2 |9       16| P8
       P3 |10      15| P7
       P4 |11      14| P6
      GND |12      13| P5
          +----------+

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    74677   16-bit inverting address comparator with enable.

      +---+--+---+
   A1 |1  +--+ 24| VCC
   A2 |2       23| /EN
   A3 |3       22| Y
   A4 |4       21| P3
   A5 |5       20| P2
   A6 |6   74  19| P1
   A7 |7  677  18| P0
   A8 |8       17| A16
   A9 |9       16| A15
  A10 |10      15| A14
  A11 |11      14| A13
  GND |12      13| A12
      +----------+

    74682   8-bit inverting magnitude comparator with fully integrated 100k pull-up resistors.

       +---+--+---+
  /A>B |1  +--+ 20| VCC
    A0 |2       19| A=B
    B0 |3       18| B7
    A1 |4       17| A7
    B1 |5   74  16| B6
    A2 |6  682  15| A6
    B2 |7       14| B5
    A3 |8       13| A5
    B3 |9       12| B4
   GND |10      11| A4
       +----------+

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    74684   8-bit inverting magnitude comparator.

       +---+--+---+
  /A>B |1  +--+ 20| VCC
    A0 |2       19| A=B
    B0 |3       18| B7
    A1 |4       17| A7
    B1 |5   74  16| B6
    A2 |6  684  15| A6
    B2 |7       14| B5
    A3 |8       13| A5
    B3 |9       12| B4
   GND |10      11| A4
       +----------+

    74686   8-bit inverting magnitude comparator with enable.

       +---+--+---+
  /A>B |1  +--+ 24| VCC
  /EN1 |2       23| /EN2
    A0 |3       22| /A=B
    B0 |4       21| B7
    A1 |5       20| A7
    B1 |6   74  19|
       |7  686  18| B6
    A2 |8       17| A6
    B2 |9       16| B5
    A3 |10      15| A5
    B3 |11      14| B4
   GND |12      13| A4
       +----------+

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    74687   8-bit open-collector inverting magnitude comparator with enable.

       +---+--+---+
  /A>B |1  +--+ 24| VCC
  /EN1 |2       23| /EN2
    A0 |3       22| /A=B
    B0 |4       21| B7
    A1 |5       20| A7
    B1 |6   74  19|
       |7  687  18| B6
    A2 |8       17| A6
    B2 |9       16| B5
    A3 |10      15| A5
    B3 |11      14| B4
   GND |12      13| A4
       +----------+

    74688   8-bit inverting identity comparator with enable.

      +---+--+---+
  /EN |1  +--+ 20| VCC
   A0 |2       19| /A=B
   B0 |3       18| B7
   A1 |4       17| A7
   B1 |5   74  16| B6
   A2 |6  688  15| A6
   B2 |7       14| B5
   A3 |8       13| A5
   B3 |9       12| B4
  GND |10      11| A4
      +----------+

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    74689   8-bit open-collector inverting identity comparator with enable.

      +---+--+---+
  /EN |1  +--+ 20| VCC
   A0 |2       19| /A=B
   B0 |3       18| B7
   A1 |4       17| A7
   B1 |5   74  16| B6
   A2 |6  689  15| A6
   B2 |7       14| B5
   A3 |8       13| A5
   B3 |9       12| B4
  GND |10      11| A4
      +----------+

    74691   4-bit 3-state synchronous binary counter with output registers,
  asynchronous reset and ripple carry output and with Multiplexed
   register / counter outputs.

         +---+--+---+
  /CRST |1  +--+ 20| VCC
   CCLK |2       19| RCO
     P0 |3       18| Q0
     P1 |4       17| Q1
     P2 |5   74  16| Q2
     P3 |6  691  15| Q3
    ENP |7       14| ENT
  /RRST |8       13| /LOAD
   RCLK |9       12| /OE
    GND |10      11| R//C
        +----------+

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    74697   4-bit 3-state synchronous binary up/down counter with
  output registers, with asynchronous reset and ripple
  carry output. Multiplexed register / counter outputs.

        +---+--+---+
   U//D |1  +--+ 20| VCC
   CCLK |2       19| RCO
     P0 |3       18| Q0
     P1 |4       17| Q1
     P2 |5   74  16| Q2
     P3 |6  697  15| Q3
    ENP |7       14| ENT
  /CRST |8       13| /LOAD
   RCLK |9       12| /OE
    GND |10      11| R//C
        +----------+

    74699   4-bit 3-state synchronous binary up / down counter
  with output registers, reset and ripple carry output.
  Multiplexed register / counter outputs.

        +---+--+---+
   U//D |1  +--+ 20| VCC
   CCLK |2       19| RCO
     P0 |3       18| Q0
     P1 |4       17| Q1
     P2 |5   74  16| Q2
     P3 |6  699  15| Q3
    ENP |7       14| ENT
  /CRST |8       13| /LOAD
   RCLK |9       12| /OE
    GND |10      11| R//C
        +----------+


" DISCLAIMER "


We believe the above information to be correct, however,  typographical errors 
can occur and it is for this very reason, we provide the above information "as is" 
with "no Warranty" as to "correctness" nor to its "accuracy". Please, always 
check  with your " own data books "  or via a "Google" search on the net.
Please notify us if you have discovered a typographical error and we will fix it.
 E. &. O. E.
This page was upgraded January 31st 2013