Overview
The M41T00AUDD1F is a low-power serial real-time clock (RTC) with an integral audio section, manufactured by STMicroelectronics. This device combines the functionalities of a precise real-time clock with an audio section featuring a tone generator and a 300 mW output amplifier. It is designed to operate within a temperature range of 0 °C to 70 °C and is packaged in a small DFN16 package (5 mm x 4 mm).
Key Specifications
| Parameter | Value |
|---|---|
| Voltage Range | 3.0 to 3.6 V |
| Backup Voltage Range | Down to 1.7 V |
| Oscillator Frequency | 32,768 Hz (external crystal controlled) |
| I2C Bus Frequency | 400 kHz |
| Audio Output Power | 300 mW into 8 Ω (THD+N = 2% max, f = 1 kHz) |
| Audio Gain Adjustment | -33 dB to +12 dB, 3 dB steps |
| Package Type | DFN16 (5 mm x 4 mm) |
| Backup Current | Ultra-low 400 nA at 3.0 V (typ) |
| Trickle Charge Circuit | For backup capacitor charging |
Key Features
- Combination real-time clock with audio section including a 300 mW differential audio amplifier and tone generator (256 and 512 Hz).
- Automatic backup switchover circuit with ultra-low backup current.
- On-chip trickle charge circuit for backup capacitor.
- 400 kHz I2C bus interface.
- M41T00 compatible register set with counters for seconds, minutes, hours, day, date, month, years, and century.
- Automatic leap year compensation and oscillator fail detect circuit.
- Volume control with 16-step programmable gain.
- Audio automatically shuts off in backup mode.
Applications
The M41T00AUDD1F is suitable for a variety of applications requiring precise timekeeping and audio functionality, such as:
- Consumer electronics (e.g., alarm clocks, radios).
- Industrial control systems.
- Medical devices.
- Automotive systems.
- IoT devices requiring real-time clock and audio capabilities.
Q & A
- What is the voltage range for the M41T00AUDD1F?
The M41T00AUDD1F operates within a voltage range of 3.0 to 3.6 V. - What is the backup voltage range for the device?
The device can maintain timekeeping down to 1.7 V in backup mode. - What is the frequency of the oscillator used in the M41T00AUDD1F?
The oscillator frequency is 32,768 Hz, controlled by an external crystal. - What is the I2C bus frequency supported by the device?
The device supports a 400 kHz I2C bus frequency. - What is the output power of the audio amplifier?
The audio amplifier provides 300 mW into 8 Ω (THD+N = 2% max, f = 1 kHz). - How is the gain of the audio amplifier adjusted?
The gain can be adjusted from -33 dB to +12 dB in 3 dB steps. - What type of package is the M41T00AUDD1F available in?
The device is packaged in a DFN16 package (5 mm x 4 mm). - What is the typical backup current of the device?
The typical backup current is ultra-low at 400 nA at 3.0 V. - Does the device have a trickle charge circuit for the backup capacitor?
Yes, the device includes an on-chip trickle charge circuit for charging the backup capacitor. - What interface does the device use for communication?
The device uses a 400 kHz I2C bus interface.
