The Cypress CY7C024E-55AXC is a 64 Kbit dual-port asynchronous SRAM organized as 4K x 16 bits. Dual-port architecture allows two independent buses — typically two microcontrollers, DSPs, or an FPGA and a processor — to read and write the same memory array simultaneously, with arbitration logic on chip to resolve contention. The 55 ns access time sets the bus cycle window for both ports; at 5 V ± 0.5 V supply, it mates naturally with legacy 5 V logic families or mixed-voltage systems where the SRAM is the slower domain. Packaged in a 100-pin TQFP (14x14 mm body), it is a surface-mount device intended for parallel memory interfaces in industrial control, telecom line cards, multi-processor systems, and any application requiring shared memory with independent port access.
In a dual-port system each port sees the same 55 ns window, so the system clock or bus cycle must accommodate at least 55 ns for a read operation. Write cycle time is also 55 ns per the datasheet. This places the part in the mid-speed tier for asynchronous SRAMs — fast enough for most 8- to 16-bit microcontroller buses running at 10–20 MHz, but not for sub-20 ns cache or high-throughput DSP pipelines. If your existing design uses a 55 ns or slower dual-port SRAM, this part is a direct timing match.
Cypress (now part of Infineon) has discontinued this specific dual-port SRAM variant. Buyers should verify date-code provenance and ensure the stock has not been sitting beyond a reasonable shelf life, particularly for moisture-sensitive 100-TQFP packages.
Package and footprint — 100-TQFP (14x14 mm)
This is a standard fine-pitch quad flat pack, common on dual-port SRAMs from Cypress and IDT. The footprint is compatible with other 100-pin TQFP dual-port SRAMs of the same body size, but pin assignments differ between manufacturers — always verify pin-to-pin compatibility before substituting.