256Kbit asynchronous SRAM with 15 ns access
The CY7C199NL-15ZXC is a 256Kbit asynchronous SRAM organized as 32K x 8 bits, with a 15 ns access time and 15 ns write cycle time — the speed grade matches legacy 5V bus architectures where the memory controller expects a single-cycle read/write without wait states. Operating from a 4.5V to 5.5V supply, it fits into 5V-tolerant parallel memory buses common in older microcontroller and DSP designs.
The part is supplied in tray packaging, consistent with original manufacturing.