CY7C342B-35RMB

The CY7C342B-35RMB is a 128-macrocell MAX EPLD from Cypress Semiconductor, offering fast 35-nanosecond pin-to-pin propagation delay in a reconfigurable logic device for embedded logic integration. Built on the CY7C342B family architecture, it combines a programmable AND/fixed-OR array with 128 macrocells that support both combinatorial and registered logic functions, enabling complex state machines, address decoding, and custom glue logic without the overhead of larger FPGAs. The device operates from a single 5 V supply, features erasable reprogrammability via industry-standard programmers, and is housed in a 68-pin PLCC package suited for dense through-hole or socketed board designs where reliable signal integrity is required.

Typical end-use scenarios include industrial control systems, military and aerospace avionics, telecommunications switching equipment, and legacy defense platforms that demand deterministic timing and long-term maintainability. The 35 ns speed grade serves moderate clock domains in embedded controllers and bus interface bridging, while the MAX EPLD’s non-volatile configuration eliminates external bitstream memory, simplifying system design for high-reliability environments. Procurement engineers should note that this mature technology carries inherent obsolescence risk; variants with extended temperature ranges and military screening standards (such as /883 or SMD flows) are often available through authorized sources to support long-life program requirements. In sustained production, lifecycle management and certified traceability are critical to avoid counterfeit or unauthorized substitutions. Sourcing through a distributor with rigorous EOL monitoring and documented inventory controls ensures continued supply integrity for high-reliability applications.