M40Z111_07 Datasheet, PDF (1/21 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
■ Convert low power SRAMs into NVRAMs
■ Precision power monitoring and power
switching circuitry
■ Automatic write-protection when V_CC is out-of-
tolerance
■ 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
■ Less than 15ns chip enable access
propagation delay (for 5.0v device)
■ 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
■ RoHS compliant
– Lead-free second level interconnect
SNAPHAT (SH)
battery
28
1
SOH28 (MH)
November 2007
Rev 4
1/21
www.st.com
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