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M40SZ100W

STMicroelectronics
Part Number M40SZ100W
Manufacturer STMicroelectronics
Description NVRAM supervisor
Published Apr 26, 2016
Detailed Description M40SZ100W 3 V NVRAM supervisor for LPSRAM 16 1 SO16 Features  Convert low power SRAMs into NVRAMs  3 V operating vol...
Datasheet PDF File M40SZ100W PDF File

M40SZ100W
M40SZ100W

Overview
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 selfcontained device which converts a standard lowpower 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 Contents Contents M40SZ100W 1 Device overview .
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5 2 Operation .
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8 2.
1 Data retention lifetime calculation .
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8 2.
2 Power-on reset output .
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11 2.
3 Reset input (RSTIN) .
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11 2.
4 Battery low pin .
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11 2.
5 Pow...


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