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