7400 series TTL ICs 74200--74300
74200-74300 74LSxxx, 74HCxxx, 74AHCxxx, 74Fxxx, 74ALSxxx, 54xxxx
One active low, one active high output enable.
Two enable pins control output enables, one active high and one active low.
Two enable pins control output enables, one active high and one active low.
Enable and direction pins control output enables.
Digitally programmable from 2^2 to 2^15.
Digitally programmable from 2^2 to 2^15.
74200-74300 74LSxxx, 74HCxxx, 74AHCxxx, 74Fxxx, 74ALSxxx, 54xxxx
74203
6-line inverting clock driver.    +---+--+---+
 1Y |1  +--+ 20| 1A
 2Y |2       19| 2A
 3Y |3       18| 3A
GND |4       17|
GND |5   74  16| VCC
GND |6  203  15| VCC
GND |7       14|
 4Y |8       13| 4A
 5Y |9       12| 5A
 6Y |10      11| 6A
    +----------+
74204
6-line inverting clock driver.    +---+--+---+
 1Y |1  +--+ 20| 1A
 2Y |2       19| 2A
 3Y |3       18| 3A
GND |4       17|
GND |5   74  16| VCC
GND |6  204  15| VCC
GND |7       14|
 4Y |8       13| 4A
 5Y |9       12| 5A
 6Y |10      11| 6A
    +----------+
74208
Dual 3-state 1-line to 4-line noninverting clock driver.    +---+--+---+
1Y2 |1  +--+ 20| 1Y1
1Y3 |2       19| 1A
1Y4 |3       18| /1OE1
GND |4       17| /1OE2
GND |5   74  16| VCC
GND |6  208  15| VCC
GND |7       14| 2A
2Y1 |8       13| /2OE1
2Y2 |9       12| /2OE2
2Y3 |10      11| 2Y4
    +----------+
74209
Dual 3-state 1-line to 4-line noninverting clock driver.    +---+--+---+
1Y2 |1  +--+ 20| 1Y1
1Y3 |2       19| 1A
1Y4 |3       18| /1OE1
GND |4       17| /1OE2
GND |5   74  16| VCC
GND |6  209  15| VCC
GND |7       14| 2A
2Y1 |8       13| /2OE1
2Y2 |9       12| /2OE2
2Y3 |10      11| 2Y4
    +----------+
74221
Dual monostable multivibrators with Schmitt-trigger inputs.       +---+--+---+
  /1TR |1  +--+ 16| VCC
   1TR |2       15| 1RCext
 /1RST |3       14| 1Cext
   /1Q |4   74  13| 1Q
    2Q |5  221  12| /2Q
 2Cext |6       11| /2RST
2RCext |7       10| 2TR
   GND |8        9| /2TR
       +----------+
74237
1-of-8 noninverting decoder/demultiplexer with address latches.     +---+--+---+
  S0 |1  +--+ 16| VCC
  S1 |2       15| Y0
  S2 |3       14| Y1
 /LE |4   74  13| Y2
/EN2 |5  237  12| Y3
 EN1 |6       11| Y4
  Y7 |7       10| Y5
 GND |8        9| Y6
     +----------+
74238
1-of-8 noninverting decoder/demultiplexer.     +---+--+---+            +---+----+----+---+---+---*---+---+---+---+
  S0 |1  +--+ 16| VCC        |EN1|/EN2|/EN3| S2| S1| S0|/Y0|/Y1|...|/Y7|
  S1 |2       15| Y0         +===+====+====+===+===+===*===+===+===+===+
  S2 |3       14| Y1         | 0 | X  |  X | X | X | X | 0 | 0 | 0 | 0 |
/EN3 |4   74  13| Y2         | 1 | 1  |  X | X | X | X | 0 | 0 | 0 | 0 |
/EN2 |5  238  12| Y3         | 1 | 0  |  1 | X | X | X | 0 | 0 | 0 | 0 |
 EN1 |6       11| Y4         | 1 | 0  |  0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
  Y7 |7       10| Y5         | 1 | 0  |  0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
 GND |8        9| Y6         | 1 | 0  |  0 | . | . | . | 0 | 0 | . | 0 |
     +----------+            | 1 | 0  |  0 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |
                             +---+----+----+---+---+---*---+---+---+---+
74239
Dual 1-of-4 noninverting decoder/demultiplexer.     +---+--+---+            +---+---+---*---+---+---+---+
/1EN |1  +--+ 16| VCC        |/EN| S1| S0| Y0| Y1| Y2| Y3|
 1S0 |2       15| /2EN       +===+===+===*===+===+===+===+
 1S1 |3       14| 2S0        | 1 | X | X | 0 | 0 | 0 | 0 |
 1Y0 |4   74  13| 2S1        | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
 1Y1 |5  239  12| 2Y0        | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
 1Y2 |6       11| 2Y1        | 0 | 1 | 0 | 0 | 0 | 1 | 0 |
 1Y3 |7       10| 2Y2        | 0 | 1 | 1 | 0 | 0 | 0 | 1 |
 GND |8        9| 2Y3        +---+---+---*---+---+---+---+
     +----------+
74240
Dual 4-bit 3-state inverting buffer/line driver.     +---+--+---+
/1OE |1  +--+ 20| VCC
 1A1 |2       19| /2OE
/2Y4 |3       18| /1Y1
 1A2 |4       17| 2A4
/2Y3 |5  74   16| /1Y2
 1A3 |6  240  15| 2A3
/2Y2 |7       14| /1Y3
 1A4 |8       13| 2A2
/2Y1 |9       12| /1Y4
 GND |10      11| 2A1
     +----------+
74241
Dual 4-bit 3-state noninverting buffer/line driver.One active low, one active high output enable.
     +---+--+---+
/1OE |1  +--+ 20| VCC
 1A4 |2       19| 2OE
 2Y1 |3       18| 1Y1
 1A3 |4       17| 2A4
 2Y2 |5  74   16| 1Y2
 1A2 |6  241  15| 2A3
 2Y3 |7       14| 1Y3
 1A1 |8       13| 2A2
 2Y4 |9       12| 1Y4
 GND |10      11| 2A1
     +----------+
74242
4-bit 3-state inverting bus transceiver.Two enable pins control output enables, one active high and one active low.
     +---+--+---+
/GAB |1  +--+ 14| VCC
     |2       13| GBA
  A1 |3  74   12|
  A2 |4  242  11| B1
  A3 |5       10| B2
  A4 |6        9| B3
 GND |7        8| B4
     +----------+
74243
4-bit 3-state noninverting bus transceiver.Two enable pins control output enables, one active high and one active low.
     +---+--+---+
/GAB |1  +--+ 14| VCC
     |2       13| GBA
  A1 |3  74   12|
  A2 |4  243  11| B1
  A3 |5       10| B2
  A4 |6        9| B3
 GND |7        8| B4
     +----------+
74244
Dual 4-bit 3-state noninverting buffer/line driver.     +---+--+---+
/1OE |1  +--+ 20| VCC
 1A1 |2       19| /2OE
 2Y4 |3       18| 1Y1
 1A2 |4       17| 2A4
 2Y3 |5  74   16| 1Y2
 1A3 |6  244  15| 2A3
 2Y2 |7       14| 1Y3
 1A4 |8       13| 2A2
 2Y1 |9       12| 1Y4
 GND |10      11| 2A1
     +----------+
74245
8-bit 3-state 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  245  15| B4          +---+---*---+---+
 A6 |7       14| B5
 A7 |8       13| B6
 A8 |9       12| B7
GND |10      11| B8
    +----------+
74247
Open-collector BCD to 7-segment decoder/common-anode LED driver with ripple blank input and output.     +---+--+---+
  A1 |1  +--+ 16| VCC
  A2 |2       15| /YF
 /LT |3       14| /YG
/RBO |4  74   13| /YA
/RBI |5  247  12| /YB
  A3 |6       11| /YC
  A0 |7       10| /YD
 GND |8        9| /YE
     +----------+
74248
BCD to 7-segment decoder/common-cathode LED driver with ripple blank input and output.     +---+--+---+
  A1 |1  +--+ 16| VCC
  A2 |2       15| YF
 /LT |3       14| YG
/RBO |4  74   13| YA
/RBI |5  248  12| YB
  A3 |6       11| YC
  A0 |7       10| YD
 GND |8        9| YE
     +----------+
74251
8-to-1 line 3-state data selector/multiplexer with complementary outputs.    +---+--+---+
 A3 |1  +--+ 16| VCC
 A2 |2       15| A4
 A1 |3       14| A5
 A0 |4   74  13| A6
  Y |5  251  12| A7
 /Y |6       11| S0
/EN |7       10| S1
GND |8        9| S2
    +----------+
74253
8-to-2 line 3-state noninverting data selector/multiplexer.     +---+--+---+
/1EN |1  +--+ 16| VCC
  S1 |2       15| /2EN
 1A3 |3       14| S0
 1A2 |4   74  13| 2A3
 1A1 |5  253  12| 2A2
 1A0 |6       11| 2A1
  1Y |7       10| 2A0
 GND |8        9| 2Y
     +----------+
74256
2-of-8 addressable latch with reset and enable.     +---+--+---+            +---+----*--------------------+
  S0 |1  +--+ 16| VCC        |/EN|/RST| Function           |
  S1 |2       15| /RST       +===+====*====================+
  1D |3       14| /EN        | 0 |  0 | 2-of-8 demultiplex |
 1Q0 |4  74   13| 2D         | 0 |  1 | addressable latch  |
 1Q1 |5  256  12| 2Q3        | 1 |  0 | reset              |
 1Q2 |6       11| 2Q2        | 1 |  1 | hold               |
 1Q3 |7       10| 2Q1        +---+----*--------------------+
 GND |8        9| 2Q0
     +----------+
74257
8-to-4 line 3-state noninverting data selector/multiplexer.    +---+--+---+
  S |1  +--+ 16| VCC
1A0 |2       15| /EN
1A1 |3       14| 4A0
 1Y |4   74  13| 4A1
2A0 |5  257  12| 4Y
2A1 |6       11| 3A0
 2Y |7       10| 3A1
GND |8        9| 3Y
    +----------+
74258
8-to-4 line 3-state inverting data selector/multiplexer.    +---+--+---+
  S |1  +--+ 16| VCC
1A0 |2       15| /EN
1A1 |3       14| 4A0
/1Y |4   74  13| 4A1
2A0 |5  258  12| /4Y
2A1 |6       11| 3A0
/2Y |7       10| 3A1
GND |8        9| /3Y
    +----------+
74259
1-of-8 addressable latch with reset.    +---+--+---+             +---+----*--------------------+
 S0 |1  +--+ 16| VCC         |/EN|/RST| Function           |
 S1 |2       15| /RST        +===+====*====================+
 S2 |3       14| /EN         | 0 |  0 | 1-of-8 demultiplex |
 Q0 |4   74  13| D           | 0 |  1 | addressable latch  |
 Q1 |5  259  12| Q7          | 1 |  0 | reset              |
 Q2 |6       11| Q6          | 1 |  1 | hold               |
 Q3 |7       10| Q5          +---+----*--------------------+
GND |8        9| Q4
    +----------+
74260
Dual 5-input NOR gates.    +---+--+---+                 ___________
 1A |1  +--+ 14| VCC         Y = (A+B+C+D+E)
 1B |2       13| 2D
 1E |3   74  12| 2C
 1C |4  260  11| 2E
 1D |5       10| 2B
/1Y |6        9| 2A
GND |7        8| /2Y
    +----------+
74265
Dual buffer/inverter plus dual AND/NAND gates.    +---+--+---+
 1A |1  +--+ 16| VCC         1Y=1A
 1Y |2       15| 4A
/1Y |3       14| 4Y          2Y=2A.2B
 2A |4   74  13| /4Y
 2B |5  265  12| 3B          3Y=3A.3B
 2Y |6       11| 3A
/2Y |7       10| 3Y          4Y=4A
GND |8        9| /3Y
    +----------+
74266
Quad 2-input open-collector XNOR gates.    +---+--+---+             +---+---*---+          _     _ _
 1A |1  +--+ 14| VCC         | A | B |/Y |     Y = A$B = (A.B)+(A.B)
 1B |2       13| 4B          +===+===*===+
/1Y |3  74   12| 4A          | 0 | 0 | Z |
 2A |4  266  11| /4Y         | 0 | 1 | 0 |
 2B |5       10| 3B          | 1 | 0 | 0 |
/2Y |6        9| 3A          | 1 | 1 | Z |
GND |7        8| /3Y         +---+---*---+
    +----------+
74273
8-bit 3-state D flip-flop with reset.     +---+--+---+            +----+---+---*---+
/RST |1  +--+ 20| VCC        |/RST|CLK| D | Q |
  1Q |2       19| 8Q         +====+===+===*===+
  1D |3       18| 8D         |  0 | X | X | 0 |
  2D |4       17| 7D         |  1 | / | 0 | 0 |
  2Q |5   74  16| 7Q         |  1 | / | 1 | 1 |
  3Q |6  273  15| 6Q         +----+---+---*---+
  3D |7       14| 6D
  4D |8       13| 5D
  4Q |9       12| 5Q
 GND |10      11| CLK
     +----------+
74276
Quad J-K and J-/K flip-flops with common set and reset.      +---+--+---+
 /RST |1  +--+ 20| VCC
   1J |2       19| 4J
/1CLK |3       18| /4CLK
  /1K |4       17| 4K
   1Q |5   74  16| 4Q
   2Q |6  276  15| 3Q
  /2K |7       14| /3K
/2CLK |8       13| /3CLK
   2J |9       12| 3J
  GND |10      11| /SET
      +----------+
74279
Quad /S-/R latches.     +---+--+---+
 /1R |1  +--+ 16| VCC
/1S1 |2       15| /4S
/1S2 |3       14| /4R
  1Q |4   74  13| 4Q
 /2R |5  279  12| /3S2
 /2S |6       11| /3S1
  2Q |7       10| /3R
 GND |8        9| 3Q
     +----------+
74280
9-bit odd/even parity generator/checker.      +---+--+---+
   A0 |1  +--+ 14| VCC
   A1 |2       13| A8
      |3   74  12| A7
   A2 |4  280  11| A6
 EVEN |5       10| A5
  ODD |6        9| A4
  GND |7        8| A3
      +----------+
74283
4-bit binary full adder with fast carry.    +---+--+---+
 S2 |1  +--+ 16| VCC         S=A+B+CIN
 B2 |2       15| B3
 A2 |3       14| A3
 S1 |4   74  13| S3
 A1 |5  283  12| A4
 B1 |6       11| B4
CIN |7       10| S4
GND |8        9| COUT
    +----------+
74285
4-bit binary multiplier with open-collector outputs.    +---+--+---+
 2C |1  +--+ 16| VCC
 2B |2       15| 2D
 2A |3       14| /GA
 1D |4   74  13| /GB
 1A |5  285  12| Y0
 1B |6       11| Y1
 1C |7       10| Y2
GND |8        9| Y3
    +----------+
74286
9-bit odd/even parity generator/checker with bus driver parity I/O port.      +---+--+---+
   A0 |1  +--+ 14| VCC
   A1 |2       13| A8
/XMIT |3   74  12| A7
   A2 |4  286  11| A6
ERROR |5       10| A5
 PI/O |6        9| A4
  GND |7        8| A3
      +----------+
74290
4-bit asynchronous decade counter with /2 and /5 sections, set(9) and reset.     +---+--+---+
SET1 |1  +--+ 14| VCC
     |2       13| RST2
SET2 |3   74  12| RST1
  Q2 |4  290  11| /CLK1
  Q1 |5       10| /CLK0
     |6        9| Q0
 GND |7        8| Q3
     +----------+
74292
15-bit programmable frequency divider/digital timer.Digitally programmable from 2^2 to 2^15.
     +---+--+---+
  S1 |1  +--+ 16| VCC
  S4 |2       15| S2
 TP1 |3       14| S3
CLK1 |4  74   13| TP3
CLK2 |5  292  12|
 TP2 |6       11| /RST
   Q |7       10| S0
 GND |8        9|
     +----------+
74293
4-bit asynchronous binary counter with /2 and /8 sections and reset.     +---+--+---+
     |1  +--+ 14| VCC
     |2       13| RST2
     |3       12| RST1
  Q2 |4  74   11| /CLK1
  Q1 |5  293  10| /CLK0
     |6        9| Q0
 GND |7        8| Q3
     +----------+
74294
15-bit programmable frequency divider/digital timer.Digitally programmable from 2^2 to 2^15.
     +---+--+---+
  S1 |1  +--+ 16| VCC
  S0 |2       15| S2
  TP |3       14| S3
CLK1 |4  74   13|
CLK2 |5  294  12|
     |6       11| /RST
   Q |7       10|
 GND |8        9|
     +----------+
74295
4-bit 3-state negative-edge-triggered universal shift register.       +---+--+---+
     D |1  +--+ 14| VCC
    P0 |2       13| Y0
    P1 |3       12| Y1
    P2 |4  74   11| Y2
    P3 |5  295  10| Y3
LD//SH |6        9| /CLK
   GND |7        8| OE
       +----------+
74297
Digital phase-locked loop with 4-bit counter.      +---+--+---+
   D1 |1  +--+ 16| VCC
   D0 |2       15| D2
   EN |3       14| D3
  KCP |4  74   13| PA2
 I//D |5  297  12| ECPD
 D//U |6       11| XORPD
IDout |7       10| PB
  GND |8        9| PA1
      +----------+
74298
8-to-4 line noninverting data selector/multiplexer with output registers.    +---+--+---+
2A1 |1  +--+ 16| VCC
2A0 |2       15| 1Q
1A0 |3       14| 2Q
1A1 |4   74  13| 3Q
3A1 |5  298  12| 4Q
4A1 |6       11| CLK
4A0 |7       10| S
GND |8        9| 3A0
    +----------+
74299
8-bit 3-state bidirectional universal shift register with asynchronous reset and with separate shift left and shift right serial inputs. Multiplexed parallel I/O.     +---+--+---+
  S0 |1  +--+ 20| VCC
/OE1 |2       19| S1
/OE2 |3       18| D
  P6 |4       17| Q7
  P4 |5   74  16| P7
  P2 |6  299  15| P5
  P0 |7       14| P3
  Q0 |8       13| P1
/RST |9       12| CLK
 GND |10      11| L
     +----------+
 
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