INTEGRATED ULTRALOW POWER SRAM,
REAL TIME CLOCK, POWER-FAIL CONTROL
CIRCUIT and BATTERY
BYTEWIDEE RAM-LIKE CLOCK ACCESS
BCD CODED YEAR, MONTH, DAY, DATE,
HOURS, MINUTES and SECONDS
TYPICAL CLOCK ACCURACY of ± 1 MINUTE
a MONTH,@ 25°C
SOFTWARE CONTROLLED CLOCK
CALIBRATIONfor HIGHACCURACY
APPLICATIONS
AUTOMATICPOWER-FAILCHIPDESELECTand
WRITE PROTECTION
TWO WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage):
– M48T08: 4.5V 3 VPFD 3 4.75V
– M48T18: 4.2V 3 VPFD 3 4.5V
SELF-CONTAINED BATTERY and CRYSTAL
in the CAPHAT DIP PACKAGE
SOIC PACKAGE PROVIDES DIRECT
CONNECTION for a SNAPHATHOUSING
CONTAINING the BATTERY and CRYSTAL
SNAPHAT[ HOUSING (BATTERY and
CRYSTAL) is REPLACEABLE
10 YEARS of DATA RETENTION and CLOCK
OPERATION in the ABSENCE of POWER
PIN and FUNCTION COMPATIBLE with
DS1643 and JEDEC STANDARD 8K x 8
SRAMs