Programmable logic for glue-logic consolidation
The Microchip ATF16LV8C-10XU is an electrically-erasable programmable logic device (EE PLD) from the 16V8 family, offering 8 macrocells in a 20-TSSOP surface-mount package. It replaces multiple discrete 7400-series or 4000-series logic gates with a single reprogrammable part, reducing board area and BOM count.
10 ns speed — timing margin for address decode
The 10 ns tPD (propagation delay from input to combinatorial output) is the critical timing parameter for this PLD. In a typical address-decode application, the 10 ns window must fit within the memory or peripheral chip-select setup time plus any PCB trace delay. At a 50 MHz bus clock (20 ns period), the decode path consumes half the cycle, leaving the other half for data access — marginal for fast SRAM but workable with slower peripherals. For designs needing tighter timing, the 15 ns ATF16V8BQL-15XU is a slower alternative; the 10 ns grade is the faster option in this family.
20-TSSOP footprint and supply rails
The 3V to 5.5V supply range allows direct connection to 3.3V FPGA banks or 5V legacy buses without external regulation. Decouple with a 0.1 µF ceramic close to each VCC pin — the fast edge rates from the 10 ns output transitions can couple noise into the supply if bypassing is sparse.