CY7C346-35RMB

The CY7C346-35RMB from Cypress Semiconductor is a 128-macrocell MAX Electrically Programmable Logic Device (EPLD), providing predictable, non-volatile logic integration for high-reliability systems. It belongs to a mature EPLD family built on a CMOS architecture, delivering a 35-nanosecond pin-to-pin propagation delay across its macrocell array. The device architecture supports both combinatorial and registered logic functions, allowing designers to consolidate glue logic, state machines, and complex decoding onto a single programmable chip. Its 128 macrocells are interconnected through a deterministic routing fabric, ensuring fixed timing behavior independent of logic placement—a critical attribute for synchronous designs requiring setup and hold time guarantees without iterative place-and-route validation.

Encased in a ceramic pin grid array (CPGA) package, this component is targeted at environments where thermal resilience, shock tolerance, and long-term stability are paramount. Typical deployments include aerospace navigation processors, defense fire-control logic modules, and ruggedized industrial automation controllers that must survive extended temperature ranges and vibration. For procurement engineers, the CPGA form factor often signals commercial or industrial temperature grades; specifications for military screening (e.g., MIL-STD-883) should be verified against the exact suffix code if full qualification is needed. As a legacy programmable logic device from a supplier that has since shifted focus, the CY7C346-35RMB faces inherent obsolescence risk. Obsolescence planning, approved vendor list scrutiny, and last-time-buy evaluations are recommended for sustainment programs and new design-in decisions involving this part.