DESCRIPTION
The M48Z129Y/V ZEROPOWER SRAM is a 1,048,576 bit non-volatile static RAM organized as 131,072 words by 8 bits. The device combines an internal lithium battery, a CMOS SRAM and a control circuit in a plastic 32 pin DIP Module. The M48Z129Y/V directly replaces industry standard 128K x 8 SRAM. It also provides the non-volatility of FLASH without any requirement for special write timing or limitations on the number of writes that can be performed.

■ INTEGRATED ULTRA LOW POWER SRAM, POWER-FAIL CONTROL CIRCUIT, and BATTERY
■ AUTOMATIC POWER-FAIL CHIP DESELECT AND WRITE PROTECTION
■ MICROPROCESSOR POWER-ON RESET (RESET VALID EVEN DURING BATTERY BACK-UP MODE)
■ BATTERY LOW PIN - PROVIDES WARNING OF BATTERY END-OF-LIFE
■ WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage):
   – M48Z129Y: 4.2V ≤ VPFD ≤ 4.5V
   – M48Z129V: 2.7V ≤ VPFD ≤ 3.0V
■ CONVENTIONAL SRAM OPERATION; UNLIMITED WRITE CYCLES
■ 10 YEARS OF DATA RETENTION IN THE ABSENCE OF POWER
■ PIN AND FUNCTION COMPATIBLE WITH JEDEC STANDARD 128Kb x 8 SRAMS
■ SELF CONTAINED BATTERY IN DIP PACKAGE