Description
The M48T35/Y TIMEKEEPER® RAM is a 32 Kb 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 memory and real-time clock solution.

FEATUREs
■ 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 5.5 V; 4.5 V ≤ VPFD ≤ 4.75 V
    – M48T35Y: VCC = 4.5 to 5.5 V; 4.2 V ≤ VPFD ≤ 4.5 V
■ 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 compliant
    – Lead-free second level interconnect