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STMicroelectronics - NVRAM supervisor

Numéro de référence M40SZ100W
Description NVRAM supervisor
Fabricant STMicroelectronics 
Logo STMicroelectronics 





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M40SZ100W fiche technique
M40SZ100W
3 V NVRAM supervisor for LPSRAM
16
1
SO16
Features
Convert low power SRAMs into NVRAMs
3 V operating voltage
Precision power monitoring and power
switching circuitry
Automatic write-protection when VCC is out-of-
tolerance
Choice of supply voltage and power-fail
deselect voltage:
– VCC = 2.7 to 3.6 V; 2.55 V VPFD 2.70 V
Reset output (RST) for power on reset
1.25 V reference (for PFI/PFO)
Less than 15 ns chip enable access
propagation delay
Battery low pin (BL)
RoHS compliant
– Lead-free second level interconnect
Datasheet - production data
Description
The M40SZ100W 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.
When an invalid VCC condition occurs, the
conditioned chip enable output (ECON) is forced
inactive to write protect the stored data in the
SRAM. During a power failure, the SRAM is
switched from the VCC pin to the external battery
to provide the energy required for data retention.
On a subsequent power-up, the SRAM remains
write-protected until a valid power condition
returns.
December 2013
This is information on a product in full production.
DocID007528 Rev 4
1/20
www.st.com

PagesPages 20
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