The ATF22V10CQ-15JI is a Microchip electrically-erasable PLD from the 22V10 family, offering a 15 ns propagation delay from input to combinatorial output. That speed grade supports system clocks up to about 50 MHz with reasonable timing margin for registered logic, and keeps combinatorial decode delays short enough for fast address decoding or state-machine sequencing in 5 V legacy designs.
10 macrocells — logic capacity for glue
With 10 macrocells, this PLD can absorb a handful of 7400-series logic gates or a small state machine. Each macrocell can be configured as registered or combinatorial, with programmable output polarity. The 22V10 architecture is well-known and supported by most PLD compilers, so retargeting existing 22V10 logic into this part is straightforward.
28-PLCC footprint — board and rework notes
Housed in a 28-lead PLCC (J-Lead) package measuring 11.51 x 11.51 mm, the ATF22V10CQ-15JI is a surface-mount device. The J-lead form factor requires a soldering profile that avoids overheating the plastic body; typical reflow peak is 220-235 °C. The PLCC socket is an option for prototyping, but production boards usually solder direct. The 5 V supply rail is the only power needed — no separate VCCIO or VPP required during normal operation.