31 Oct
2001
31 Oct
'01
8:59 a.m.
Simple circuits in DTL were cheap and easy to manufacture. As the speed and
density went up, the cost went up, but not so much with TTL as with DTL.
Apparently there were lots of reasons for this, but I never had much interest in
DTL, so I have to plead ignorance. My early TTL databooks are dated in the
early '70's, and DTL came before then.
Dick
----- Original Message -----
From: "John Allain" <allain(a)panix.com>
To: <classiccmp(a)classiccmp.org>
Sent: Wednesday, October 31, 2001 3:37 PM
Subject: Re: CPU design at the gate level
Chuck said:
DTL -> TTL -> LSI -> FPGA
Sure I'm familliar with the concept, but only from
an overview standpoint. Just what is it with DTL vs
TTL anyway? Why didn't they use TTL from the
start? Was it a eureka genius thing or did it take
advanced transistors to make it possible?
A quick answer would suffice, we got too much
bandwith as it is.
John A (software guy)
This question for me dates back to the early 80's