The EDI88257C is a 2 Megabit 256Kx8 bit Monolithic CMOS Static RAM.
The 32 pin DIP pinout adheres to the JEDEC standard for the two megabit device, and is a pin replacement for the 256Kx8 module, EDI88257C. The device is upgradeable to the 512Kx8 SRAM, the EDI88512C. Pin 1 becomes the higher order address.
A Low Power version, EDI88257LP, offers a data retention function for battery back-up opperation. Military product is available compliant to Appendix A of MIL-PRF-38535.

FEATURES
■ 256Kx8 CMOS Static
■ Random Access Memory
    • Access Times of 70, 85, 100ns
    • Data Retention Function (LP Versions)
    • TTL Compatible Inputs and Outputs
    • Fully Static, No Clocks
■ JEDEC Approved Pinout
    • 32 pin Ceramic DIP, 0.6 mils wide (Package 9)
■ Single +5V (±10%) Supply Operation