Indentification of old (1970) logic family?

[mcb, inc.]

Google and friends have been of no help and hoping someone
can help me identify some devices. I'm doing a bit of reverse-
engineering on a device that uses a logic family I've never
encountered and which I can't find. Functions appear to be
similar to ttl (gates, hex inverters, flipflops). Packages
are standard 14-, 16-, and 24-pin dip. Manufacture date
is 1970. Logo is an outlined box with small 's' inside (LSI?).
Given loads and resister pull-up values, logic can sink quite
a bit of current. Power supply is a bit outside of standard
ttl spec (running about 5.6V). Devices I'm trying to track
down are: TR1001, TR1004, TR1005, TR1006, TR1007, TR1008,
TR1009, TR1010, TR1011, TR1014, TR1016, and TR1023.

My museum doesn't go back far enough so I'm looking for any
info. I don't need electrical characteristics, just function
and pinout. Thanks...

--
Monty Brandenberg

 

[Norm Dresner]

"mcb, inc." <mcbinc@world.std.com> wrote in message
newsine.SGI.4.40.0407042107090.8873054-100000@shell01-g...

Google and friends have been of no help and hoping someone
can help me identify some devices. I'm doing a bit of reverse-
engineering on a device that uses a logic family I've never
encountered and which I can't find. Functions appear to be
similar to ttl (gates, hex inverters, flipflops). Packages
are standard 14-, 16-, and 24-pin dip. Manufacture date
is 1970. Logo is an outlined box with small 's' inside (LSI?).
Given loads and resister pull-up values, logic can sink quite
a bit of current. Power supply is a bit outside of standard
ttl spec (running about 5.6V). Devices I'm trying to track
down are: TR1001, TR1004, TR1005, TR1006, TR1007, TR1008,
TR1009, TR1010, TR1011, TR1014, TR1016, and TR1023.

My museum doesn't go back far enough so I'm looking for any
info. I don't need electrical characteristics, just function
and pinout. Thanks...

The TI TTL databook gives 7V as the absolute maximum supply voltage for a

TTL IC and 5.5V as the maximum input level.

They might be nothing more than common chips with house numbers being
totally abused.

Norm

 

[mcb, inc.]

On Mon, 5 Jul 2004, Norm Dresner wrote:

They might be nothing more than common chips with house numbers being
totally abused.

Possibly. But the company in question only had one product and
that product never really shipped. So I don't think they could
have afforded a private labelling.

--
Monty Brandenberg