Description
The M48Z58/Y ZEROPOWER® RAM is an 8Kbit x 8 non-volatile static RAM that integrates power-fail deselect circuitry and battery control logic on a single die. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory solution.
The M48Z58/Y is a non-volatile pin and function equivalent to any JEDEC standard 8K x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed.
The 28-pin, 600mil DIP CAPHAT™ houses the M48Z58/Y silicon with a long life lithium button cell in a single package.

FEATUREs
■ Integrated, ultra low power SRAM, power-fail control circuit, and battery
■ READ cycle time equals WRITE cycle time
■ Automatic power-fail chip deselect and WRITE protection
■ WRITE protect voltages:
   (VPFD = Power-fail deselect voltage)
   – M48Z58: VCC = 4.75 to 5.5V
      4.5V ≤ VPFD ≤ 4.75V
   – M48Z58Y: VCC = 4.5 to 5.5V
      4.2V ≤ VPFD ≤ 4.5V
■ Self-contained battery in the CAPHAT™ DIP package
■ Packaging includes a 28-lead SOIC and SNAPHAT® top (to be ordered separately)
■ SOIC package provides direct connection for a SNAPHAT top which contains the battery
■ Pin and function compatible with JEDEC standard 8Kbit x 8 SRAMs
■ RoHS compliant
   – Lead-free second level interconnect