= = = = = = = = = = =74203-74299

   LM/CD 7400 series TTL IC's:  74203 to 74299 



 . . . . . . . .  . . . . . . . .
 




      Email us :sales@unitechelectronics.com

The TTL building blocks 74200 and 74LS200 series of TTL logic IC's. 

------------------------------------------------------------------------

    ** Click here for TOP of page **




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
    +----------+




    ** Click here for TOP of page **





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
    +----------+




    ** Click here for TOP of page **





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
     +----------+




    ** Click here for TOP of page **





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        +---+---+---*---+---+---+---+
     +----------+




    ** Click here for TOP of page **





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
     +----------+




    ** Click here for TOP of page **





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
     +----------+




    ** Click here for TOP of page **





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
    +----------+




    ** Click here for TOP of page **





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 with 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
     +----------+




    ** Click here for TOP of page **





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
     +----------+




    ** Click here for TOP of page **





74256

 2-of-8 addressable latch with reset and with 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
    +----------+




    ** Click here for TOP of page **





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
    +----------+




    ** Click here for TOP of page **





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
    +----------+




    ** Click here for TOP of page **





74266

Quad 2-input open-collector with 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         +---+---*---+
    +----------+



Positive Logic


	    _______
	Y = A XOR B





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
     +----------+




    ** Click here for TOP of page **





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
     +----------+




    ** Click here for TOP of page **





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
    +----------+




    ** Click here for TOP of page **





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
      +----------+




    ** Click here for TOP of page **





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|
     +----------+




    ** Click here for TOP of page **





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|
     +----------+




    ** Click here for TOP of page **





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
      +----------+




    ** Click here for TOP of page **





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
     +----------+






 . . . . . . . .  . . . . . . . .
 



 " 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.
                                                   E. &. O. E.