Description
The M48T212V is a self-contained device that includes a real-time clock (RTC), programmable alarms, a watchdog timer, and two external chip enable outputs which provide control of up to four (two in parallel) external low-power static RAMs.
   
Features
■ Integrated real-time clock, power-fail control
    circuit, battery and crystal
■ Converts low power SRAM into NVRAMs
■ Year 2000 compliant (4-digit year)
■ Battery low flag
■ Microprocessor power-on reset
■ Programmable alarm output active in the
    battery backed-up mode
■ Watchdog timer
■ Automatic power-fail chip deselect and WRITE
    protection
■ WRITE protect voltage
    (VPFD = Power-fail deselect voltage):
    – M48T212V: VCC = 3.0 to 3.6V
        2.7V ≤ VPFD ≤ 3.0V
■ Packaging includes a 44-lead SOIC and
    SNAPHAT® top (to be ordered separately)
■ RoHS compliant
    – Lead-free second level interconnect