The GAL16V8D-15QPN is classified as Obsolete by Lattice Semiconductor.
Device identity and logic capacity
This is an EE PLD (Electrically Erasable Programmable Logic Device) from the GAL®16V8 series, offering 8 macrocells in a 20-pin DIP footprint.
What the 8 macrocells mean for fit
Eight macrocells means the device can implement up to eight registered or combinatorial logic functions — enough for glue logic, address decoding, state machines, or bus-interface consolidation in a legacy design. The EE PLD programmable type allows in-system or off-board reprogramming via a standard programmer — a practical advantage over OTP (one-time programmable) alternatives when the logic definition is still being debugged or updated in the field.