Dual-port SRAM in a 100-LQFP — board-fit and timing
The CY7C024E-15AXCT is a 64Kbit dual-port asynchronous SRAM organized as 4K x 16 bits. Two independent ports with separate address, data, and control lines let two bus masters read or write any location simultaneously — no arbitration logic needed on the board for shared memory access. Access time is 15 ns, matching the write cycle time of 15 ns (word and page modes). At 5 V nominal, this gives a 66 MHz equivalent random-access rate — fast enough for mid-range DSP handshakes, FIFO emulation, or mailbox registers between two processors on the same backplane. The 100-LQFP package (14x14 mm body, 0.5 mm pitch) is a standard fine-pitch QFP. Reflow profile follows JEDEC MSL level 3; the part survives a 260 °C peak without popcorn damage if pre-baked before assembly.
Supply rails and temperature grade
Not rated for extended industrial or automotive ambient; a fan-forced enclosure keeps the junction below the 70 °C ceiling. Memory interface is parallel with full asynchronous handshake — no clock input. Chip enables, output enables, and write strobes per port are level-sensitive; the 15 ns access time starts from the last-arriving address or control signal, so timing closure on the PCB trace length mismatch is straightforward.
Quantities are lot-specific and confirmed at RFQ. No pin-compatible drop-in replacement from Infineon exists; a functional replacement would require a board spin or a different dual-port SRAM family with the same 100-LQFP footprint and 4K x 16 organization.