M48T212Y Datasheet, PDF (1/32 Pages) STMicroelectronics – 5V/3.3V TIMEKEEPER CONTROLLER Supervisor

M48T212Y
M48T212V
5.0V or 3.3V TIMEKEEPER^® Supervisor
FEATURES SUMMARY
■ 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
■ CHOICE OF WRITE PROTECT VOLTAGES
(V_PFD = Power-fail Deselect Voltage):
– M48T212Y: V_CC = 4.5 to 5.5V
4.2V ≤ V_PFD ≤ 4.5V
– M48T212V: V_CC = 3.0 to 3.6V
2.7V ≤ V_PFD ≤ 3.0V
■ PACKAGING INCLUDES A 44-LEAD SOIC
AND SNAPHAT^® TOP (to be ordered
separately)
Figure 1. 44-pin SOIC Package
SNAPHAT (SH)
Crystal/Battery
44
1
SOH44 (MH)
April 2004
1/32