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Serial Real-Time Clocks
M41ST85W: "Non-Volatizor" with Embedded Crystal
M41ST85W Product Page

M41ST85W Additional Technical Information

M41ST85 Features
The M41ST85W "Non-Volatizor" combines the features of a Microprocessor Supervisor, a Serial Real-Time Clock, and an NVRAM Supervisor, providing the ultimate system device.

Its Power-Fail Detect and Watchdog circuits manage the microprocessor while its Battery Switchover and Write Protect circuits render the Low-Power SRAM non-volatile.
Serial RTC 400kHz I2C Bus
3.0/3.3V Operating Voltage (Vcc = 2.7 to 3.6V)
RoHS Compliance - components are compliant with the RoHS Directive
Serial RTC with registers for hours, minutes, seconds, day, date, month, year, century, and tenths/hundredths of seconds
Automatic Switchover and Write Protect Circuitry
44 Bytes of NVRAM
Programmable Square Wave Generator
RTC Calibration
Programmable Alarm - functions in battery-backed mode
Supervisor and Non-volatizor Features:
 

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 Vout and Chip Enable Gate for Non-volatizing external LPSRAM

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 Power-on Reset / Low-Voltage Detect

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 Two Reset Inputs - One for Push-button reset

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 Battery Monitor

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 Programmable Watchdog

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 Early Power-fail Warning (PFI/PFO) with 1.25V Reference
–40°C to +85°C
Packaging
 

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 28-lead SNAPHAT® SOIC (Lead-free)
– 28-lead Embedded Crystal SOIC (Lead-free)
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M41ST85 Applications

Medical

Servers
SCSI
POS
Vending Machines

Gaming
Consumer
'
More Information

M41ST85W Datasheet
More Embedded Crystal Products
Serial RTC Lead-free Packages Program
M41ST85W Additional Technical Information

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