M41ST85Y M41ST85W
5.
0 OR 3.
0V, 512 bit (64 x 8) SERIAL RTC and NVRAM SUPERVISOR
FEATURES SUMMARY s 5.
0 OR 3.
0V OPERATING
VOLTAGE s SERIAL INTERFACE SUPPORTS I2C BUS
(400 KHz)
s NVRAM SUPERVISOR FOR EXTERNAL LPSRAM
s OPTIMIZED FOR MINIMAL INTERCONNECT TO MCU
s 2.
5 TO 5.
5V OSCILLATOR OPERATING
VOLTAGE
s AUTOMATIC SWITCH-OVER and DESELECT CIRCUITRY
s CHOICE OF POWER-FAIL DESELECT
VOLTAGES
– M41ST85Y: VCC = 4.
5 to 5.
5V; 4.
20V ≤ VPFD ≤ 4.
50V
– M41ST85W: VCC = 2.
7 to 3.
6V; 2.
55V ≤ VPFD ≤ 2.
70V
s 1.
25V REFERENCE (for PFI/PFO)
s COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEAR, and CENTURY
s 44 BYTES OF GENERAL PURPOSE RAM
s PROGRAMMABLE ALARM and INTERRUPT...