Question on chip date code

From: Eric Smith <eric_at_brouhaha.com>
Date: Mon Feb 10 18:29:00 2003

Tony wrote:
> I read somewhere (and I am not sure how accurate this is) that 'DM'
> stands for Digital Monolithic,

National Semiconductor databooks from 1975-1976 give explanations of
some of the prefixes:

AH - Analog Hybrid
DM - Digital Monolithic
DS - Digital Special
LH - Linear Hybrid
LM - Linear Monolithic
MH - MOS Hybrid
MM - MOS Monolithic

There was also one for transducers, and maybe a few others I've
forgotten.

Note that there are some anomalies in the numbering. For instance,
the MH0025 and MH0026 MOS clock drivers apparently used the MH prefix
because they were used for *driving* MOS parts, not because they
were constructed using MOS. They were then redesigned as monolithic
parts, but given a DS prefix.

> and 'SN' for Semiconductor Network. The
> second is probably more likely to be correct than the first..

That's the first time I've seen any explanation for a TI prefix.
Received on Mon Feb 10 2003 - 18:29:00 GMT