This is a document about the M41T00AUD product, which is a serial real-time clock (RTC) with audio features. It features a 256 and 512 Hz tone generator, a 300 mW differential audio amplifier with a gain range of -33 to +12 dB, and operates in the temperature range of 0 °C to 70 °C. The RTC is based on M41T00 and offers additional functionalities such as automatic backup switchover circuit, ultra-low backup current, on-chip trickle charge circuit, 400 kHz I2C bus, and calibration register for adjustments.
The M41T00AUD is a low-power serial real-time clock (RTC) with an integral audio section, featuring a 300 mW output amplifier and tone generation. It is a superset of the M41T00, offering enhancements such as an oscillator fail detect circuit and automatic backup switchover. The device operates on a 3.0 to 3.6 V supply and supports timekeeping down to 1.7 V.
| Supply Voltage | 3.0 to 3.6 V |
|---|---|
| Timekeeping Voltage | down to 1.7 V |
| Backup Current | 400 nA (typ) |
| Bus Speed | 400 kHz |
| Oscillator Frequency | 32,768 Hz |
| Audio Output Power | 300 mW |
| Package Type | DFN16 |
| Operating Temperature | 0 °C to 70 °C |
Typical data retention times will be in excess of 5 years with a 50 mAh 3 V lithium cell.
Yes, it has an automatic backup switchover circuit that detects power failures and switches to the backup input.
The gain adjustment range is from -33 dB to +12 dB in 3 dB steps.