8-macrocell EE PLD in a 20-PLCC footprint
The GAL16V8QS-10LVI is an electrically erasable programmable logic device (EE PLD) from National Semiconductor, offering 8 macrocells in a 20-lead PLCC package (J-Lead, 9x9 mm body). With 8 macrocells, this part handles small-scale combinatorial and registered logic functions — address decoding, state machines, bus arbitration — that would otherwise consume multiple 74-series DIPs. The EE PLD technology means the configuration is stored on-chip and can be erased and reprogrammed in-circuit or in a programmer.
Package and board-fit for the reflow line
The 20-PLCC package (J-Lead) has a 9x9 mm footprint with leads on a 1.27 mm pitch. The J-lead geometry self-centers during reflow, reducing tombstoning risk compared to gull-wing packages of the same era. The surface mount mounting type means it places on standard SMT lines without through-hole hand-loading. For low-volume or prototype runs, bulk is simpler to handle and inspect.
No pin-compatible second source or official successor is listed on the manufacturer's cross-reference for this variant.