TTL Schematics

Nov 29, 2007 9 Replies

The early Texas Instruments TTL Databooks of 1974/1976 showed the full actual Gate-Logic Schematics for each of the TTL IC's. Can anyone please direct me to a facility that supplies these same type Datasheets.



Thanks for any help...



Regards, Rod snipped-for-privacy@eircom.net


ONSEMI (Motorola) do, for example:

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Probably don't do that for every chip though.

Dave.

try this link You can find EXACTLY what You are looking for:

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bye delo

"Rod Johnson" ha scritto nel messaggio news:1%u3j.23503$ snipped-for-privacy@news.indigo.ie...

It's one thing to show the gate-level circuit, as for a D-type flip flop in this case. It's quite another to show the full transistor-level circuit. Some of the old RCA COSMAC (i.e., cmos) datasheets did that.

Well, the 74/76 TI databook is online at bitsavers, if that's exactly what you want.

For the better, logic design since the 70's has progressed to be less logic-schematic driven and more truth-table and table-driven. Makes synthesis and testing infinitely easier after you get past the 7447 seven-segment decoder :-).

To be completely fair, some of the chips in the 76 TI databook were actually bipolar PROM's preprogrammed with a truth table and if you look at these chips in the 76 TI databook, for example the 74184, you just see truth tables.

Tim.

Nostalgia..... I used those to replace a 32 x 64 diode microprogram board on PDP 'type' computer....They made up the op codes and the instruction set.... :) Dam unreliable in those days :(

Was that the Hoover "dam" or some other structure ?:-)

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | America: Land of the Free, Because of the Brave

Hoover has been running more or less uneventfully for about 70 years. I call that pretty reliable.

It must be some other structure (Teton?)

"Electricity is of two kinds, positive and negative. The difference is, I presume, that one comes a little more expensive, but is more durable; the other is a cheaper thing, but the moths get into it." (Stephen Leacock)

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