20 ns propagation delay — what it buys you
The ATF22V10CQZ-20JC is a 20 ns EE PLD from Microchip's 22V10 family, offering 10 macrocells in a 28-PLCC package. The 20 ns speed grade sets the maximum combinational propagation delay from input to registered output, which directly limits the system clock frequency — for a synchronous design, budget at least 20 ns per logic stage plus setup time.
No official successor is listed on the record.
EE PLD — electrically erasable, reprogrammable
The EE PLD designation means the logic configuration is stored in electrically erasable cells, allowing in-system or off-board reprogramming. This is useful for prototyping and field-updateable logic, though the 20 ns speed and 10 macrocells limit it to small-scale glue logic and state machines — not large counters or complex controllers.