ID old WE ICs?

[J. Michael Milner]

I've got a tube of 41HU and 41HW ICs. The date codes are 1178 but I can't
find them in either my 1976 or 1980 WE data books. I assume they are TTL
SSI. Any old Bell shaped heads know what they are exactly?

 

[Watson A.Name - \"Watt Su]

"J. Michael Milner" <jmmilner@att.not> wrote in message
news:4roSb.140119$6y6.2726211@bgtnsc05-news.ops.worldnet.att.net...

I've got a tube of 41HU and 41HW ICs. The date codes are 1178 but I
can't
find them in either my 1976 or 1980 WE data books. I assume they are TTL
SSI. Any old Bell shaped heads know what they are exactly?

If they're that old, they might be some other, such as DTL or RTL. You
could put power on one and exercise it, see if it "does something" besides
letting the smoke out.

 

[J. Michael Milner]

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:101ko1eo1n0j922@corp.supernews.com...

"J. Michael Milner" <jmmilner@att.not> wrote in message
news:4roSb.140119$6y6.2726211@bgtnsc05-news.ops.worldnet.att.net...
I've got a tube of 41HU and 41HW ICs. The date codes are 1178 but I
can't
find them in either my 1976 or 1980 WE data books. I assume they are
TTL
SSI. Any old Bell shaped heads know what they are exactly?

If they're that old, they might be some other, such as DTL or RTL. You
could put power on one and exercise it, see if it "does something" besides
letting the smoke out.


Actually the WE parts tended to be more leading edge than you give them

credit for. The 1A processor, introduced in 1976, used 10 ns TTL logic with
modified output drivers to reduce power dissipation - unlike most systems of
the day, this one uses only convectional cooling. While the WE part naming
scheme leaves much to be desired, it does give some clue to the family the
part is in. 41s are TTL, 502s are op amps, etc. I'll do the experimental
approach if nobody knows for sure.