NVRAM CONTROLLER for up to EIGHT LPSRAM
DESCRIPTION
The M40Z300/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.
â CONVERT LOW POWER SRAMs into
NVRAMs
â PRECISION POWER MONITORING and
POWER SWITCHING CIRCUITRY
â AUTOMATIC WRITE-PROTECTION when VCC
is OUT-OF-TOLERANCE
â TWO INPUT DECODER ALLOWS CONTROL
for up to 8 SRAMs (with 2 devices active in
parallel)
â CHOICE of SUPPLY VOLTAGES and
POWER-FAIL DESELECT VOLTAGES:
â M40Z300:
VCC = 4.5V to 5.5V
THS = VSS 4.5V ⤠VPFD ⤠4.75V
THS = VOUT 4.2V ⤠VPFD ⤠4.5V
â M40Z300W:
VCC = 3.0V to 3.6V
THS = VSS 2.8V ⤠VPFD ⤠3.0V
VCC = 2.7V to 3.3V
THS = VOUT 2.5 ⤠VPFD ⤠2.7V
â RESET OUTPUT (RST) for POWER ON
RESET
â LESS THAN 12ns CHIP ENABLE ACCESS
PROPAGATION DELAY (for 5.0V device)
â PACKAGING INCLUDES a 28-LEAD SOIC
and SNAPHAT® TOP, or a 16-LEAD SOIC
(to be Ordered Separately)
â SOIC PACKAGE PROVIDES DIRECT
CONNECTION for a SNAPHAT TOP which
CONTAINS the BATTERY
â BATTERY LOW PIN (BL)
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