DESCRIPTION
The M48T212Y/V are self-contained devices that include 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.
■ CONVERTS LOW POWER SRAM into
NVRAMs
■ YEAR 2000 COMPLIANT (4-Digit Year)
■ BATTERY LOW FLAG
■ INTEGRATED REAL TIME CLOCK,
POWER-FAIL CONTROL CIRCUIT, BATTERY
and CRYSTAL
■ AUTOMATIC POWER-FAIL CHIP DESELECT
and WRITE PROTECTION
■ WATCHDOG TIMER
■ CHOICE of WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage):
– M48T212Y: 4.2V ≤ VPFD ≤ 4.5V
– M48T212V: 2.7V ≤ VPFD ≤ 3.0V
■ MICROPROCESSOR POWER-ON RESET
■ PROGRAMMABLE ALARM OUTPUT ACTIVE
in the BATTERY BACKED-UP MODE
■ PACKAGING INCLUDES a 44-LEAD SOIC and
SNAPHAT TOP (to be Ordered Separately)