M48Z129Y M48Z129V 3.3V/5V 1 Mbit (128Kb x8) ZEROPO.
ST Microelectronics
M48Z129Y - 3.3V/5V 1 Mbit 128Kb x8 ZEROPOWER SRAM
M48Z129Y M48Z129V 3.3V/5V 1 Mbit (128Kb x8) ZEROPOWER® SRAM s INTEGRATED ULTRA LOW POWER SRAM, POWER-FAIL CONTROL CIRCUIT, and BATTERY AUTOMATIC POWE.