74 series :: Ttl ics 74400 74499

TTL ICs: 74400...74499


74423

Dual retriggerable monostable multivibrator with overriding reset.
Cannot be triggered via reset input.
       +---+--+---+
  /1TR |1  +--+ 16| VCC
   1TR |2       15| 1RCext
 /1RST |3       14| 1Cext
   /1Q |4   74  13| 1Q
    2Q |5  423  12| /2Q
 2Cext |6       11| /2RST
2RCext |7       10| 2TR
   GND |8        9| /2TR
       +----------+

74465

8-bit 3-state noninverting buffer/line driver.
     +---+--+---+
/OE1 |1  +--+ 20| VCC
  A1 |2       19| /OE2
  Y1 |3       18| A8
  A2 |4       17| Y8
  Y2 |5  74   16| A7
  A3 |6  465  15| Y7
  Y3 |7       14| A6
  A4 |8       13| Y6
  Y4 |9       12| A5
 GND |10      11| Y5
     +----------+

74490

Dual 4-bit asynchronous decade counters with set(9) and reset.
      +---+--+---+
/1CLK |1  +--+ 16| VCC
 1RST |2       15| /2CLK
  1QA |3       14| 2RST
 1SET |4   74  13| 2Q0
  1QB |5  490  12| 2SET
  1QC |6       11| 2Q1
  1QD |7       10| 2Q2
  GND |8        9| 2Q3
      +----------+









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