20 ns EE PLD for glue-logic and state machines
The Microchip ATF22V10CQZ-20PU is an electrically erasable programmable logic device from the 22V10 family, offering 10 macrocells and a 20 ns propagation delay. It runs on a 5 V supply and is housed in a through-hole 24-PDIP package.
The 20 ns propagation delay is the pin-to-pin combinatorial path. The 5 V I/O is compatible with legacy TTL and 5 V CMOS families.
10 macrocells — what you can fit
Ten macrocells each contain a flip-flop and a configurable output structure. The EE programmability means you can iterate the logic in-circuit without UV erasure cycles.
Through-hole DIP — board fit and hand-solderability
It is through-hole, so it can be hand-soldered or socketed. For a hobbyist or a rework lab, that means no hot-air station needed; a standard soldering iron and a 24-pin DIP socket get the job done.
Microchip lists the ATF22V10CQZ-20PU as Active. No official second-source or successor is listed, but the 22V10 architecture is widely second-sourced — any 22V10 from a reputable vendor with the same speed grade and package will be pin-compatible.