15 ns PLD — timing closure for 5V glue logic
The Microchip ATF16V8BQL-15SI is an electrically-erasable programmable logic device (EE PLD) from the 16V8 family, packing 8 macrocells with a 15 ns propagation delay. It runs on a 5V supply and comes in a 20-SOIC wide-body package (0.295-inch width, 7.50 mm body).
15 ns — what that buys on the bus
The 15 ns propagation delay (tpd) means the output settles 15 ns after the input crosses the threshold.
Microchip has stopped manufacturing it — no last-time-buy window remains open. If this is on your BOM, the smart move is to qualify a replacement before the next build cycle.
What fits in the socket — package and footprint
The 20-SOIC wide-body (JEDEC MO-119 variation, 0.295-inch body width, 7.50 mm) is the same footprint as the ATF16V8BQL-15SU (the lead-free variant) and the ATF16V8B-15SI. If your board is laid out for a standard 20-SOIC narrow (0.150-inch, 3.90 mm), this wide-body part will not fit — the pad pitch is the same (1.27 mm), but the row spacing is wider. Check the board layout before ordering.