M40SZ100Y Datasheet, PDF (1/19 Pages) STMicroelectronics – 5V or 3V NVRAM SUPERVISOR FOR LPSRAM

M40SZ100Y
M40SZ100W
5V or 3V NVRAM SUPERVISOR FOR LPSRAM
FEATURES SUMMARY
s CONVERT LOW POWER SRAMs INTO
NVRAMs
s 5V OR 3V OPERATING VOLTAGE
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:
– M40SZ100Y: V_CC = 4.5 to 5.5V;
4.20V ≤ V_PFD ≤ 4.50V
– M40SZ100W: V_CC = 2.7 to 3.6V;
2.55V ≤ V_PFD ≤ 2.70V
s RESET OUTPUT (RST) FOR POWER ON
RESET
s 1.25V REFERENCE (for PFI/PFO)
s LESS THAN 10ns CHIP ENABLE ACCESS
PROPAGATION DELAY (at 5V)
s OPTIONAL PACKAGING INCLUDES A 28-
LEAD SOIC and SNAPHAT^® TOP (to be
ordered separately)
s 28-LEAD SOIC PACKAGE PROVIDES
DIRECT CONNECTION FOR A SNAPHAT
TOP WHICH CONTAINS THE BATTERY
s BATTERY LOW PIN (BL)
Figure 1. 16-pin SOIC Package
16
1
SO16 (MQ)
Figure 2. 28-pin SOIC Package*
SNAPHAT (SH)
Battery
28
1
SOH28 (MH)
* Contact Local Sales Office
September 2003
Rev. 1.3
1/19