12 ns speed, 10 macrocells — where this 22V10 fits
The ATF22V10CZ-12PC is an electrically erasable PLD from Atmel's 22V10 series, offering 10 macrocells with a 12 ns propagation delay. It runs on a single 5V rail — no separate I/O or core voltage — and comes in a 24-pin DIP (0.300" body) for through-hole assembly.
What the 12 ns rating means for your glue logic
The 12 ns propagation delay sets the maximum clock rate for registered logic and the combinatorial path budget. In a 5V system running at 50 MHz, the 12 ns delay leaves about 8 ns of margin after the clock-to-output of the driving flip-flop — enough for a few levels of sum-of-products logic before the next clock edge. If your state machine needs to decode a 16-bit address in one cycle, this part keeps the timing closure manageable. With 10 macrocells, each configurable as registered or combinatorial, the ATF22V10CZ-12PC handles typical address decoding, bus interface logic, and small state machines. The 5V-only I/O means it interfaces directly with legacy 5V TTL/CMOS logic, but level translation is needed when talking to a 3.3V or 1.8V core.
Obsolete — sourcing reality for the ATF22V10CZ-12PC
Atmel has marked the ATF22V10CZ-12PC as obsolete.