The ATF22V10CQ-15PI is a Microchip 22V10-series EE PLD with a 15 ns propagation delay, 10 macrocells, and a 5V supply input. The 15 ns speed rating means combinatorial inputs propagate to registered outputs within that window, setting the maximum system clock rate and the timing budget for glue-logic paths in older 5V designs.
Microchip lists the ATF22V10CQ-15PI as Obsolete.
10 macrocells, 24-DIP — matching the replacement
The 10-macrocell count and 24-DIP (0.300", 7.62mm) package define the logic capacity and board footprint. Any pin-compatible replacement must match both the macrocell density and the DIP layout. The 15 ns speed is the timing floor — a faster part (e.g., 10 ns or 7.5 ns) can drop in if the design's combinatorial paths tolerate the tighter hold-time margin, but a slower part cannot. The 5V-only input rail limits drop-in to other 5V 22V10 variants; 3.3V-only parts need level translation.