The ATF22V10CQ-15XC is a 5V electrically-erasable PLD from Microchip's 22V10 family, offering a 15 ns propagation delay from input to combinatorial output. That 15 ns sets the upper bound on the clock frequency in registered mode and the address-access window in asynchronous decode applications — for a 33 MHz bus, the 15 ns tPD leaves roughly 15 ns of setup margin before the next clock edge, enough for most glue-logic paths without pipeline registers.
10 macrocells — logic capacity for PAL/GAL replacement
Ten macrocells, each configurable as registered or combinatorial, give this PLD the density to replace a handful of 20-pin PALs or GALs in a single 24-TSSOP package.
Microchip lists the ATF22V10CQ-15XC as Obsolete. For a legacy BOM line, the only channel is surplus or broker inventory — date-code and marking verification becomes the critical step.
24-TSSOP footprint — rework and layout notes
The fine pitch demands a controlled hot-air rework profile — the recommended peak temperature for lead-free reflow is 260 °C. In layout, place a 0.1 µF decoupling cap within 5 mm of each VCC pin; the 5 V supply rail should be wide enough to handle the transient current during registered output switching.