The Cypress CY7C131-55NXC is an 8Kbit asynchronous dual-port SRAM organized as 1K x 8, with a 55 ns access time. It is designed for systems that need two independent buses to read from or write to the same memory array without arbitration overhead — typically shared memory in multiprocessor or DSP systems, FIFO emulation, or register-file applications.
Package and footprint — 52-pin QFP
The CY7C131-55NXC is supplied in a 52-BQFP package, also described as a 52-PQFP with a 10x10 mm body. It is a surface-mount gull-wing quad flat pack. The footprint is a standard 52-pin QFP with 0.65 mm pitch. For rework or replacement, the same package footprint is shared by several other Cypress dual-port SRAM densities, but the supply voltage and timing must be verified.