Description
The M40SZ100Y/W NVRAM Controller is a self-contained device which converts a standard low-power SRAM into a non-volatile memory. A precision voltage reference and comparator monitors the VCC input for an out-of-tolerance condition.

Features
■ Convert low power SRAMs into NVRAMs
■ 5V or 3V operating voltage
■ Precision power monitoring and power switching circuitry
■ Automatic write-protection when VCC is out-oftolerance
■ Choice of supply voltages and power-fail deselect voltages:
    – M40SZ100Y: VCC = 4.5 to 5.5V; 4.20V ≤ VPFD ≤ 4.50V
    – M40SZ100W: VCC = 2.7 to 3.6V; 2.55V ≤ VPFD ≤ 2.70V
■ Reset output (RST) for power on reset
■ 1.25V reference (for PFI/PFO)
■ Less than 10ns chip enable access propagation delay (at 5V)
■ Optional packaging includes a 28-lead SOIC and SNAPHAT® top (to be ordered separately)
■ 28-lead SOIC package provides direct connection for a SNAPHAT top which contains the battery(a)
■ Battery low pin (BL)
■ RoHS compliant
    – Lead-free second level interconnect