The ATF22V10B-15JC is a 5V EE PLD from Microchip's 22V10 family, offering 10 macrocells and a 15 ns propagation delay. That 15 ns pin-to-pin speed sets the maximum combinatorial logic depth before the output settles — critical for address decoding, state-machine next-state logic, or bus-interface glue where the clock period is tight. At 5V supply, the internal charge pump for the EE cells is already accounted for; no extra programming voltage rail needed.
Obsolete — plan for last-time buy or alternative
Microchip lists the ATF22V10B-15JC as obsolete. If the BOM can tolerate a re-spin, a current-production 22V10 variant may fit, but verify pin compatibility and timing before substituting.
28-PLCC J-Lead — footprint and rework
The 28-PLCC package (11.51x11.51 mm body) uses J-Lead gull-wing bends on all four sides. The J-Lead profile gives a smaller footprint than an equivalent SOIC but requires a specific solder-paste stencil aperture to avoid bridging. The PLCC socket option exists for prototyping, but production boards typically solder direct. No exposed thermal pad — the plastic body dissipates through the leads and board copper.