This application note describes the principle and application of the M41T00AUD real-time clock with audio functions. The clock can be used in printer-fax scanner units to generate beeps and audible tones.
This document provides an application note for the M41TOOAUD, a highly integrated circuit combining a real-time clock with an audio section. It is designed for use in all-in-one printer-fax-scanner units and other consumer devices where high functionality and low cost are required. The note details the internal architecture, including the trickle charge circuit, voltage reference, and the audio path consisting of an input amplifier, low-pass filter, and bridged output amplifier.
| Output power | 300 mW into an 8 Q load |
|---|---|
| Supply voltage | 3.3 V |
| Low-pass filter frequency | 8 kHz |
| Gain steps | 16-step, digitally controlled |
| Gain range | -33 dB to +12 dB |
| THD specification | less than 2% at 1 kHz |
It is a highly integrated circuit that combines a real-time clock with an audio section.
It is perfect for all-in-one printer applications and other consumer devices.
The output section is a bridged amplifier capable of driving 300 mW into an 8 Q load.