DESCRIPTION
The M48Z08/18 ZEROPOWER® RAM is an 8K x 8 non-volatile static RAM which is pin and functional compatible with the DS1225. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory solution.
   
■ INTEGRATED ULTRA LOW POWER SRAM,
    POWER-FAIL CONTROL CIRCUIT and
    BATTERY
■ UNLIMITED WRITE CYCLES
■ READ CYCLE TIME EQUALS WRITE CYCLE
    TIME
■ AUTOMATIC POWER-FAIL CHIP DESELECT and
    WRITE PROTECTION
■ WRITE PROTECT VOLTAGES
    (VPFD = Power-fail Deselect Voltage):
    – M48Z08: 4.50V ≤ VPFD ≤ 4.75V
    – M48Z18: 4.20V ≤ VPFD ≤ 4.50V
■ SELF-CONTAINED BATTERY in the CAPHAT
    DIP PACKAGE
■ PACKAGING INCLUDES a 28 LEAD SOIC
    and SNAPHAT® TOP (to be Ordered
    Separately)
■ SOIC PACKAGE PROVIDES DIRECT
    CONNECTION for a SNAPHAT TOP which
    CONTAINS the BATTERY
■ PIN and FUNCTION COMPATIBLE with the
    DS1225 and JEDEC STANDARD 8K x 8
    SRAMs