M48T201Y Datasheet, PDF (1/33 Pages) STMicroelectronics – 3.3V-5V TIMEKEEPER CONTROLLER

M48T201Y
M48T201V
5.0 or 3.3V TIMEKEEPER^® Supervisor
FEATURES SUMMARY
■ CONVERTS LOW POWER SRAM INTO
NVRAMs
■ YEAR 2000 COMPLIANT
■ BATTERY LOW FLAG
■ INTEGRATED REAL TIME CLOCK, POWER-
FAIL CONTROL CIRCUIT, BATTERY AND
CRYSTAL
■ WATCHDOG TIMER
■ CHOICE OF WRITE PROTECT VOLTAGES
(V_PFD = Power-fail Deselect Voltage):
– M48T201Y: V_CC = 4.5 to 5.5V
4.1V ≤ V_PFD ≤ 4.5V
– M48T201V: V_CC = 3.0 to 3.6V
2.7V ≤ V_PFD ≤ 3.0V
■ MICROPROCESSOR POWER-ON RESET
(Valid even during battery back-up mode.)
■ PROGRAMMABLE ALARM OUTPUT
ACTIVE IN THE BATTERY BACKED-UP
MODE
■ PACKAGING INCLUDES A 44-LEAD SOIC
AND SNAPHAT^® TOP (to be ordered
separately)
■ SOIC PACKAGE PROVIDES DIRECT
CONNECTION FOR A SNAPHAT^® TOP
WHICH CONTAINS THE BATTERY AND
CRYSTAL
Figure 1. Package
SNAPHAT (SH)
Crystal/Battery
44
1
SOH44 (MH)
44-pin SOIC
September 2004
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