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M41ST84W Arkusz danych(PDF) 1 Page - STMicroelectronics

Numer części M41ST84W
Szczegółowy opis  3.0/3.3 V I2C serial RTC with 44 bytes of NVRAM and supervisory functions
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST84W Arkusz danych(HTML) 1 Page - STMicroelectronics

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August 2008
Rev 8
1/34
1
M41ST84W
3.0/3.3 V I2C serial RTC
with 44 bytes of NVRAM and supervisory functions
Features
Automatic battery switchover and deselect
– Power-fail deselect, VPFD = 2.60 V (nom)
–Switchover, VSO = 2.50 V (nom)
400 kHz I2C serial interface
3.0/3.3 V operating voltage
–VCC = 2.7 to 3.6 V
Ultra-low battery supply current of 500 nA
(max)
RoHS compliance
Lead-free components are compliant with the
RoHS directive
Serial RTC features
400 kHz I2C
44 bytes of general purpose NVRAM
Counters for:
– Seconds, minutes, hours, day, date, month,
and year
–Century
– 10ths/100ths of seconds
– Clock calibration register allows
compensation for crystal variations over
temperature
Programmable alarm with interrupt
– Functions during battery backup mode
Power-down timestamp (HT bit)
2.5 to 5.5 V oscillator operating voltage
32 KHz oscillator with integrated load
capacitance (12.5 pF)
Battery low flag
Microprocessor supervisory features
Programmable watchdog timer
– 62.5 ms to 128 s time-out period
Power-on reset/low voltage detect output
PFI/PFO with 1.25 V reference
Other features
Programmable squarewave generator
(1 Hz to 32 KHz)
–40°C to +85°C operation
Packaged in a 16-lead SOIC
16
1
SO16 (MQ)
www.st.com


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