On 2022-May-15, at 3:53 PM, Eric Smith wrote: > I specifically said 74x74. Early TTL flipflops were very crude by comparison.
On Mon, May 16, 2022 at 11:28 AM Brent Hilpert via cctalk < cctalk@classiccmp.org> wrote: > pre-TTL != early TTL > No, but 7470, 7472, 7473, and 74948 were _very_ early and were also very crude, as were their later L and H variants. 7474 was slightly later, and less crude. It should also be noted that the 7400 series was NOT the first commerical TTL integrated circuits. The earlier TTL flip-flops were even more crude, but I imagine the engineers that used them were nevertheless delighted at the advance over RTL and DTL.
