I have a 3 inch thick binder full of numeric displays and drivers from 1970-71. 
It has an astounding variety of obsolete Nixie and incandescent display driver chips and modules. 
Most of these are either little circuit boards or boxy DIP modules. 

David Forbes, Tucson AZ

On Jan 19, 2025, at 5:05 PM, gregebert <[email protected]> wrote:

I wonder if it's similar to the DD700, which was made by Sperry for their 7-segment displays. I actually have 1 of these my father got as a sample years ago, but never used it.

On Sunday, January 19, 2025 at 3:32:06 PM UTC-8 Leroy Jones wrote:
Lately I have been attempting to compile a list of all known nixie driver ICs
ever made.   After naming off all of the usual ones which include 7441, 74141, 74142,
Russian 74141 equivalent called KD155D1, and Signetics 8T01, there are several more
that pop up randomly in searches.   One type not often mentioned is a high voltage
logic variety (HLL) that runs on 10.8 to 20 volts.   It is called H158.

Then there are others such as Fairchild F996079.

But here is one I never heard of until now:

Anybody ever hear anything about this one?    How can a datasheet for it
ever possibly be found?     Thanks.   Chuck

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