DESCRIPTION
The M48T36 TIMEKEEPER™ RAM is a 32K x 8 non-volatile static RAM and real time clock. The monolithic chip is available in a special package to provide a highly integrated battery backed-up memory and real time clock solution. The M48T36 is a non-volatilepin and functionequivalent to any JEDEC standard 32K x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirementforspecial write timing or limitations on the number of writes that can be performed.

■ INTEGRATED ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT and BATTERY
■ FREQUENCY TEST OUTPUT for REAL TIME CLOCK
■ AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION
■ WRITE PROTECT VOLTAGE:
   – M48T36Y: 4.2V ≤ VPFD ≤ 4.5V
■ SMALL OUTLINE PACKAGE PROVIDES DIRECT CONNECTION for a SNAPHAT HOUSING CONTAINING the BATTERY and CRYSTAL
■ SNAPHAT HOUSING (BATTERY and CRYSTAL) REPLACEABLE
■ MICROPROCESSOR POWER-ON RESET
■ PROGRAMMABLE ALARM OUTPUT ACTIVE in the BATTERY BACK-UP MODE
■ BATTERY LOW WARNING