Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!wuarchive!uunet!rosie!bbeckwit
From: bbeckwit@next.com (Bob Beckwith)
Newsgroups: sci.electronics
Subject: Need help identifying IC 958_2P
Message-ID: <554@rosie.NeXT.COM>
Date: 24 Apr 91 06:40:25 GMT
Sender: news@NeXT.COM
Reply-To: bbeckwit@NeXT.COM (Bob Beckwith)
Organization: NeXT, Inc.
Lines: 38
Nntp-Posting-Host: bear.next.com


  Can anyone tell me what a 958_2P is? I've recently become the proud (and 
puzzled) owner of a Synclavier II keyboard which I'm trying to interface to my
computer. The keyboard interface card has 16 of these babies on it. As near
as I can tell, they're quad nand gates (w/open collector outputs?). Here's more info:

  14 pin ceramic dip.

  with the following markings:

  .SW
  958_2P
  7421

  (one of the packages faintly says WIAT on it as well)

  The big question is what are the output characteristics (i.e. drive and leakage current, etc.)? I think that the pinout is (something like):

  1 1A   14 Vcc
  2 1B   13 4B
  3 1Y   12 4A
  4 2Y   11 4Y
  5 2A   10 3Y
  6 2B    9 3B
  7 GND   8 3A

  Thanks!

Bob_Beckwith@NeXT.COM
Next Computer, Inc.
900 Chesapeake Drive
Redwood City, CA 94063 USA

-- 
Bob_Beckwith@NeXT.COM
Digital Hardware Engineering
Next Computer, Inc.
900 Chesapeake Drive