where to find old ICs ?

From: Tom Uban <uban_at_ubanproductions.com>
Date: Fri Aug 24 11:02:14 2001

I am trying to collect a few spares of some old ICs so that
I can continue to maintain my older DEC PDP equipment. Last
night I diagnosed a bad 74H00 in my PDP 11/45 and when I
realized that it was a hard to find component and that it
was only going to get more difficult to find, I created a
list of parts which I might need and do not have.

If anyone has additional information about any of these
parts (data sheets for the ROMs, etc.) or information on
possible substitutes, it would be appreciated. Also, if
you know of a source for these parts, that would be good
too.

--tnx
--tom


DM8598-AB ROM
DM8598-AC ROM
DM8598-AD ROM

3101 256x4 ROM
3101A 256x4 ROM
74187 256x4 ROM

74182-1 look ahead carry generator (fast version ?)
74194 4-bit bidirectional universal shift register

74H01 quad 2-in nand gates w/open collector outputs
74H10 triple 3 input nand gates
74H21 dual 4-in and gates
74H22 dual 4-in nand gates w/open collector outputs
74H30 8-in nand gate
74H40 dual 4-in nand buffers
74H50 dual 2-wide 2-in and-or-invert gates (one gate expandable)
74H74 dual d-type positive edge triggered flip flops w/preset & clear

74S15 triple 3-in and gates w/open collector outputs
74S65 4-2-3-2-in and-or-invert gate w/open collector output
74S74-45 fast version (4.5ns) of 74S74 ?


Where these parts made by or for DEC?

DEC380
DEC380A
DEC8001
DEC8251-1
DEC8815
DEC8815A
DEC8875
DEC8881
DEC8885
DEC9318

Also some transistors:

DEC4258 transistor
DEC30098 transistor
Received on Fri Aug 24 2001 - 11:02:14 BST