Burroughs parts? (was Re: PROMS but from what ?)
ethan.dicks at gmail.com
Thu Aug 26 00:09:00 CDT 2010
On 8/25/10, MikeS <dm561 at torfree.net> wrote:
> Are you sure that they're PROMs?
> They might be Burroughs numbers, but not PROMs (at least not the ones I
> looked up).
> For instance:
> 1447 3581 7438 4x2 NAND gate
> 1447 3540 7410 3x3 NAND gate
> 1447 3797 9322 4x2to1 MUX
> 2600 1495 7404 6xINV
Hey! I think I've got a tackle box full of stuff like this. One
drawer is marked "3581 '38" for example.
I picked up the tacklebox and the chips from a vendor at Dayton some years ago.
It's loaded with the following part numbers (dates listed are representative):
1447-3532 SN7404N 7909 (Nat'l Semi/Signetics/TI)
1447-3524 SN7408N 7650 (Nat'l Semi/Signetics/ITT/TI)
1447-3540 7410F 7915 (Nat'l Semi/Signetics/ITT)
1447-3565 7420 7907 (Signetics/ITT/TI)
1447-3607 SN7474N 7836 (TI/Fairchild/Signetics)
1447-3615 74107N 7912 (Nat'l Semi/Fairchild/Signetics)
1447-3557 74H11N 7738 (Nat'l Semi/ITT/Signetics)
1447-3581 7438N 7838 (Nat'l Semi/ITT/Signetics)
1447-3797 SN74157 7827 (Nat'l Semi/ITT/TI)
1447-3771 SN74161N 7701 (Nat'l Semi/TI/AMD)
1447-3755 74195 7644 (Signetics/TI/AMD)
1447-3722 74155 7709 (Signetics/TI)
1447-3714 SN74153 7832 (Nat'l Semi/Signetics/TI)
... plus a mish-mash in a bin marked "misc"... part numbers include 1447-*
* == 3599, 3706, 3623, 3698, 3789, 3649 and several more
Until this thread, I had no idea the 1447-* numbers were Burroughs.
Is anyone restoring such equipment and looking for spares? My own
interest are such that if I used these anywhere, it'd be to replace
parts gone bad in DEC M-series modules for my PDP-8/i and PDP-8/Ls.
In particular, I'm always hunting for 7474s since those seem to be
favored to fail in the gear I have (along with 7440s, statistically).
Is there a list of these part numbers? The ones I gave happen to be
listed with both the 1447-* numbers _and_ 74-series TTL numbers. The
misc drawer has numerous ones with only 1447-* numbers, and I'd like
to know what's what.
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