Description
The M48Z128/Y/V ZEROPOWER® RAM is a 128 Kbit x 8 non-volatile static RAM organized as131,072 words by 8 bits. The device combines an internal lithium battery, a CMOS SRAM and a control circuit in a plastic, 32-pin DIP module to provide a highly integrated batterybacked memory solution.
   
Features
■ Integrated, ultra low power SRAM, power-fail
    control circuit, and battery
■ Conventional SRAM operation; unlimited
    WRITE cycles
■ 10 years of data retention in the absence of
    power
■ Battery internally isolated until power is first
    applied
■ Automatic power-fail chip deselect and WRITE
    protection
■ WRITE protect voltages:
    (VPFD = power-fail deselect voltage)
    – M48Z128: VCC = 4.75 to 5.5 V
        4.5 V ≤ VPFD ≤ 4.75 V
    – M48Z128Y: VCC = 4.5 to 5.5 V
        4.2 V ≤ VPFD ≤ 4.5 V
    – M48Z128V: VCC = 3.0 to 3.6 V
        2.8 V ≤ VPFD ≤ 3.0 V
        (contact ST sales office for availability)
■ Pin and function compatible with JEDEC
    standard 128 K x 8 SRAMs
■ RoHS compliant
    – Lead-free second level interconnect