55 ns dual-port SRAM — speed grade and arbitration
The CY7C136-55NXCT: In a dual-port architecture, both ports can access any memory location simultaneously; the 55 ns access time means the address-to-data-valid delay on a read is 55 ns max, and the write cycle time (word, page) is also 55 ns. This speed grade suits bus arbitration and shared-memory designs where the system clock period is above 55 ns. The commercial temperature range (0°C to 70°C) limits it to controlled indoor environments; no industrial or automotive temperature grade is offered.
52-PQFP footprint and board integration
Housed in a 52-BQFP (plastic quad flat pack) with a 10x10 mm body — the supplier device package is 52-PQFP. The 0.65 mm pitch gull-wing leads require a surface-mount reflow profile; the package is not moisture-sensitive per typical BQFP ratings, but the reel should be baked per J-STD-033 if the seal is broken and the floor life is exceeded.
Infineon lists the CY7C136-55NXCT as Obsolete. No official successor or pin-compatible replacement is recorded from the original manufacturer.