M40Z300_07 Datasheet, PDF (1/25 Pages) STMicroelectronics – 5V or 3V NVRAM supervisor for up to 8 LPSRAMs

M40Z300
M40Z300W
5V or 3V NVRAM supervisor for up to 8 LPSRAMs
Features
■ Converts low power SRAM into NVRAMs
■ Precision power monitoring and power
switching circuitry
■ Automatic WRITE-protection when V_CC is out-
of-tolerance
■ Two-input decoder allows control for up to 8
SRAMs (with 2 devices active in parallel)
■ Choice of supply voltages and power-fail
deselect voltages:
– M40Z300:
V_CC = 4.5V to 5.5V
THS = V_SS: 4.5V ≤ V_PFD ≤ 4.75V
THS = V_OUT: 4.2V ≤ V_PFD ≤ 4.5V
– M40Z300W:
V_CC = 3.0V to 3.6V
THS = V_SS: 2.8V ≤ V_PFD ≤ 3.0V
V_CC = 2.7V to 3.3V
THS = V_OUT: 2.5 ≤ V_PFD ≤ 2.7V
■ Reset output (RST) for power on reset
■ Battery low pin (BL)
■ Less than 12ns chip enable access
propagation delay (for 5.0V device)
■ Packaging includes a 28-lead SOIC and
SNAPHAT^® top (to be ordered separately), or
A 16-lead SOIC
■ SOIC package provides direct connection for a
SNAPHAT top which contains the battery
■ RoHS compliant
– Lead-free second level interconnect
16
1
SO16 (MQ)
SNAPHAT (SH)
crystal/battery
28
1
SOH28 (MH)
November 2007
Rev 4
1/25
www.st.com
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