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From: andreww@uniwa.uwa.oz (Andrew John Williams)
Newsgroups: sci.electronics
Subject: Re: Help with 74LS688 chip
Message-ID: <1991Apr3.013413.22121@uniwa.uwa.oz>
Date: 3 Apr 91 01:34:13 GMT
References: <13133@ur-cc.UUCP>
Organization: University of Western Australia
Lines: 22

The pinout for the 74LS688 is:

  -G 1   20 Vcc
  P0 2   19 -(P=Q)
  Q0 3   18 Q7
  P1 4   17 P7
  Q1 5   16 Q6
  P2 6   15 P6 Qi
  Q2 7   14 Q5
  P3 8   13 P5
  Q3 9   12 Q4
 GND 10  11 P4

sorry if that looks a mess. I made a mistake on pin 15 (it should be P6)
and since I never really learnt VI all that well I don' know if I fixed
it or not. But anyway. How old is your TTL book? My '86 ALS/AS book has
it, and I'd guess it was LS for a while before then (I've just had a
closer look at the page. Down the bottom it says (c) 1982 Texas
Instruments. How old IS your TTL book?!?

John West (stealing Andrew's account)
and running out of foolish fish quotes