Replacement for a DEC 7474 Chip

[Eric Smith]

On Tue, May 17, 2022 at 12:35 AM ben via cctalk <cctalk at classiccmp.org>
wrote:

> Did DEC not use a few Non TTL chips to reduce I/O loading on the bufferd
> lines?
>

DEC used non-TTL buffer chips for bus interface (Omnibus, Unibus, Qbus, and
external buses like Massbus). Most of the other SSI/MSI logic chips are TTL
or TTL-compatible. TTL buffers were usually used where higher fanout was
needed on a module, or on non-bus backplane connections.