M48T35PM Datasheet - STMicroelectronics

SUMMARY DESCRIPTION
The M48T35/Y TIMEKEEPER® RAM is a 32Kb x 8 non-volatile static RAM and real time clock. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory and real time clock solution.

FEATURES SUMMARY
■ INTEGRATED, ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT AND BATTERY
■ BYTEWIDE™ RAM-LIKE CLOCK ACCESS
■ BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, AND SECONDS
■ FREQUENCY TEST OUTPUT FOR REAL TIME CLOCK
■ AUTOMATIC POWER-FAIL CHIP DESELECT AND WRITE PROTECTION
■ WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage):
    – M48T35: VCC = 4.75 to 5.5V 4.5V ≤ VPFD ≤ 4.75V
    – M48T35Y: VCC = 4.5 to 5.5V 4.2V ≤ VPFD ≤ 4.5V
■ SELF-CONTAINED BATTERY AND CRYSTAL IN THE CAPHAT™ DIP PACKAGE
■ SOIC PACKAGE PROVIDES DIRECT CONNECTION FOR A SNAPHAT® HOUSING CONTAINING THE BATTERY AND CRYSTAL
■ SNAPHAT® HOUSING (BATTERY AND CRYSTAL) IS REPLACEABLE
■ PIN AND FUNCTION COMPATIBLE WITH JEDEC STANDARD 32 Kb x 8 SRAMs
■ RoHS COMPLIANCE
    Lead-free components are compliant with the RoHS Directive.