PALC22V10B-15WMB

The PALC22V10B-15WMB is a UV-erasable programmable array logic (PAL) device manufactured by AMD (Vantis), now part of the Cypress legacy portfolio. Housed in a windowed CERDIP package, this 24-pin CMOS EPLD delivers a propagation delay of 15 nanoseconds and implements the standard 22V10 architecture, which provides 10 configurable macrocells, each featuring a D-type flip-flop with programmable output polarity and feedback paths. The macrocell design supports diverse registered and combinatorial logic configurations, allowing the device to replace multiple fixed-function TTL or CMOS components. The windowed ceramic package enables ultraviolet erasure of the fuse pattern, making it suitable for design iteration, prototyping, and applications where field reprogrammability is required, while also meeting the hermetic and environmental demands of high-reliability deployments.

Typical use cases span industrial control systems, aerospace and defense electronics, and legacy military platforms where glue logic, state machine implementation, address decoding, and bus interface consolidation are necessary. The PALC22V10B-15WMB often appears in space-constrained embedded controllers, avionics modules, and secure communication hardware where long-term reliability under wide temperature ranges and harsh conditions is mandatory. From a procurement perspective, this device is classified as end-of-life and operates in a limited availability market dominated by surplus and authorized aftermarket distributors. Windowed ceramic parts with military or industrial screening are increasingly scarce, and system designers typically consider this component for maintenance, repair, and overhaul of legacy systems rather than new designs. Obsolescence management strategies including last-time-buy bridging and form-fit-function replacements should be evaluated when sourcing this part for long-lifespan programs.