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M41ST84WMQ6 View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
M41ST84WMQ6 3.0/3.3V I2C Serial RTC with Supervisory Functions ST-Microelectronics
STMicroelectronics ST-Microelectronics
M41ST84WMQ6 Datasheet PDF : 29 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
M41ST84W
3.0/3.3V I2C Serial RTC
with Supervisory Functions
KEY FEATURES
AUTOMATIC BATTERY SWITCHOVER and
DESELECT
– Power-fail Deselect, VPFD = 2.60V (nom)
– Switchover, VSO = 2.50V (nom)
400kHz I2C SERIAL INTERFACE
3.0/3.3V OPERATING VOLTAGE
– VCC = 2.7 to 3.6V
ULTRA-LOW BATTERY SUPPLY CURRENT
of 500nA (max)
RoHS COMPLIANCE
Lead-free components are compliant with the
RoHS Directive.
Serial RTC Features
400kHz 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 Back-up Mode
Power-down Timestamp (HT Bit)
2.5 to 5.5V Oscillator Operating Voltage
32KHz Oscillator with Integrated Load
Capacitance (12.5pF)
Microprocessor Supervisory Features
Programmable Watchdog Timer
– 62.5ms to 128s time-out period
Power-on Reset/Low Voltage Detect Output
PFI/PFO with 1.25V Reference
Figure 1. 16-pin SOIC Package
16
1
SO16 (MQ)
NVRAM Supervisory Features
Non-volatizes External LPSRAM
– Automatically switches to back-up battery
and deselects (write-protects) external
LPSRAM via chip-enable gate
– Power-fail deselect (write protect) voltage,
VPFD = 2.60V (nom)
– Switchover , VSO = 2.50V (nom)
Battery Low flag
Other Features
Programmable Squarewave Generator (1Hz
to 32KHz)
–40°C to +85°C Operation
Packaged in a 16-lead SOIC
January 2006
Rev 7.0
1/29
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