Datasheet Details
| Part number | M41T81 |
|---|---|
| Manufacturer | STMicroelectronics |
| File Size | 583.32 KB |
| Description | Serial access real-time clock |
| Datasheet |
 M41T81 Datasheet
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General Description
The M41T81 is a low-power serial RTC with a built-in 32.768 kHz oscillator (external crystal controlled).
Eight bytes of the SRAM are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format.
Key Features
- For all new designs use M41T81S.
- Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century.
- 32 KHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation.
- Serial interface supports I2C bus (400 kHz protocol).
- Ultra-low battery supply current of 0.6 ΜA (typ at 3 V).
- 2.0 to 5.5 V clock operating voltage.
- Automatic switchover an.