The ATF16V8C-7SU is a 5V EE PLD from Microchip's 16V8 family, offering 8 macrocells in a 20-SOIC package. Its 7.5 ns propagation delay means it can decode addresses or implement state machines at clock rates up to roughly 100 MHz without adding wait states – a direct fit for legacy 5V bus interfaces where every nanosecond of combinatorial delay matters for timing closure.
8 macrocells – how much logic fits
Eight macrocells can be configured as registered flip-flops or combinatorial outputs, giving you enough fabric for a small address decoder, a four-bit counter, or a handful of glue-logic gates. The EE PLD architecture is electrically erasable, so you can reprogram it in-system or on a standard programmer – no UV eraser needed, which simplifies rework and firmware iteration.
5V supply – mixed-voltage design note
This part runs on a 5V rail and its I/Os are 5V-tolerant. In a mixed-voltage board with 3.3V logic, you'll need level translation on the outputs if the downstream device is not 5V-tolerant. The 20-SOIC package with 0.295-inch body width and 7.50 mm pitch is a standard footprint – no surprises for the layout engineer.
That means no LTB risk for ongoing builds.