DESCRIPTION
The M48Z2M1/2M1Y ZEROPOWER® RAM is a non-volatile 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.
   
■ INTEGRATED 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 ≤ 4.50V
■ BATTERIES ARE INTERNALLY ISOLATED
    UNTIL POWER IS APPLIED
■ PIN and FUNCTION COMPATIBLE with
    JEDEC STANDARD 2Mb x 8 SRAMs