The GAL16V8D-25QJ is a 5 V EE PLD from Lattice's GAL16V8 series, with 8 macrocells and a maximum propagation delay of 25 ns. That 25 ns tpd sets the ceiling on combinatorial logic depth in a single pass — if your address decode or state machine needs to settle within one clock cycle, the path through the PLD plus external routing must stay under that window.
Obsolete — sourcing reality
Lattice lists the GAL16V8D-25QJ as obsolete. If your BOM still calls this exact order code, the available stock is whatever the spot market holds today; there is no factory pipeline.
Housed in a 20-lead PLCC (J-Lead) package, supplier device package 20-PLCC (9x9 mm). Surface-mount, the J-lead footprint is a standard PLCC-20 land pattern — no fine-pitch challenge, but the J-bend requires a reflow profile that wets the heel fillet. The 0°C to 75°C temperature grade limits it to commercial indoor environments; no industrial or automotive range.
Supply and programming
The device is EE PLD programmable, meaning it is erased and programmed electrically, not by UV. No in-system programming capability is stated; assume a dedicated programmer is needed.