8-macrocell EE PLD for 5V glue logic
The Microchip ATF16V8BQ-10SC is an electrically erasable programmable logic device (EE PLD) from the 16V8 series, offering 8 macrocells in a 20-SOIC surface-mount package. The 10 ns propagation delay sets the timing budget for address decoding, bus arbitration, or state-machine logic running at clock rates up to around 50 MHz — adequate for most 8-bit and 16-bit microprocessor interfaces.
Obsolete — plan for a replacement
This part is officially marked Obsolete by Microchip. The closest pin-compatible alternative within the 16V8 family is the ATF16V8C-10SC, which is a functionally similar 5V EE PLD in the same 20-SOIC footprint. Confirm the programming algorithm compatibility before substituting.
5V supply and 20-SOIC footprint
The 5V input supply matches legacy TTL and 5V CMOS logic families — no level translation required. The EE PLD is electrically erasable and reprogrammable, which supports iterative logic changes during prototyping without UV erasure cycles.