SUMMARY DESCRIPTION
The M48Z2M1/Y ZEROPOWER® RAM is a nonvolatile 16,777,216-bit, Static RAM organized as 2,097,152 words by 8 bits. The device combines two internal lithium batteries, CMOS SRAMs and a control circuit in a plastic 36-pin DIP, long Module.
   
FEATURES SUMMARY
■ INTEGRATED, ULTRA LOW POWER SRAM,
    POWER-FAIL CONTROL CIRCUIT, and
    BATTERIES
■ CONVENTIONAL SRAM OPERATION;
    UNLIMITED WRITE CYCLES
■ 10 YEARS OF DATA RETENTION IN THE
    ABSENCE OF POWER
■ AUTOMATIC POWER-FAIL CHIP DESELECT
    and WRITE PROTECTION
■ WRITE PROTECT VOLTAGES
    (VPFD = Power-fail Deselect Voltage):
    – M48Z2M1: 4.5V ≤ VPFD ≤ 4.75V
    – M48Z2M1Y: 4.2V ≤ VPFD ≤ 4.5V
■ BATTERIES ARE INTERNALLY ISOLATED
    UNTIL POWER IS APPLIED
■ PIN and FUNCTION COMPATIBLE WITH
    JEDEC STANDARD 2Mb x 8 SRAMs