The Microchip ATF22V10BQ-15JC is an electrically-erasable programmable logic device (EE PLD) from the industry-standard 22V10 family, offering 10 macrocells with a 15 ns propagation delay. It operates from a 5V supply and is housed in a 28-PLCC (J-Lead) package — a surface-mount footprint that matches legacy 22V10 socketed or soldered designs. The EE technology allows in-system or programmer-based reprogramming, making it suitable for prototyping, field updates, and production where the logic pattern may evolve.
15 ns speed grade — timing budget for the bus
The 15 ns propagation delay (tPD) sets the ceiling for combinatorial logic paths between registered outputs. In a typical 5V system, this translates to a maximum clock frequency in the 50–66 MHz range for registered synchronous operation, depending on the feedback path and output loading. That's fast enough for glue logic in 8-bit and 16-bit microcontroller systems, address decoding, state machines, and bus-interface PAL/GAL replacements running at standard clock rates.
EE programmability — not OTP, not UV
Unlike one-time-programmable (OTP) or UV-erasable 22V10 variants, the ATF22V10BQ-15JC uses electrically-erasable cells. That means you can reprogram it on a standard device programmer (e.g., Data I/O, BP Micro, Xeltek) without UV erasure cycles. For a production run, the EE cell also holds the pattern reliably over the full temperature range — no battery backup needed for the configuration.