M40Z111 Datasheet, PDF (1/15 Pages) STMicroelectronics – 5V OR 3V NVRAM SUPERVISOR FOR UP TO TWO LPSRAMs

M40Z111
M40Z111W
5V OR 3V NVRAM SUPERVISOR FOR UP TO TWO LPSRAMs
FEATURES SUMMARY
s CONVERT LOW POWER SRAMs INTO
NVRAMs
s PRECISION POWER MONITORING and
POWER SWITCHING CIRCUITRY
s AUTOMATIC WRITE-PROTECTION WHEN
V_CC IS OUT-OF-TOLERANCE
s CHOICE OF SUPPLY VOLTAGES and
POWER-FAIL DESELECT VOLTAGES:
– M40Z111: V_CC = 4.5 to 5.5V
THS = V_SS; 4.5 ≤ V_PFD ≤ 4.75V
THS = V_OUT; 4.2 ≤ V_PFD ≤ 4.5V
– M40Z111W: V_CC = 3.0 to 3.6V
THS = V_SS; 2.8 ≤ V_PFD ≤ 3.0V
V_CC = 2.7 to 3.3V
THS = V_OUT; 2.5 ≤ V_PFD ≤ 2.7V
s LESS THAN 15ns CHIP ENABLE ACCESS
PROPAGATION DELAY (for 5.0V device)
s PACKAGING INCLUDES A 28-LEAD SOIC and
SNAPHAT^® TOP (to be ordered separately)
s SOIC PACKAGE PROVIDES DIRECT
CONNECTION FOR A SNAPHAT TOP WHICH
CONTAINS THE BATTERY
Figure 1. 28-pin SOIC Package
SNAPHAT (SH)
Battery
28
1
SOH28 (MH)
May 2002
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