TDA744813TR

Audio Special Purpose Overview

The TDA744813TR is a six-channel volume controller manufactured by STMicroelectronics, designed for high-quality multi-channel audio systems. It utilizes Bipolar/CMOS technology to achieve low distortion and noise with DC stepping capabilities. The device provides an attenuation range of 0 to -79dB in 1.0dB steps, allowing for independent control of each channel. All functions are programmable via a standard I2C serial bus interface. It operates on a supply voltage between 4.75V and 10V and is housed in a 20-SOIC surface-mount package.

Audio Special Purpose Feature Summary

• Six independent input/output channels with volume attenuation from 0 to -79dB
• 1.0dB step resolution for precise volume control
• I2C serial bus interface for full programmability
• Low distortion (0.1% max) and high signal-to-noise ratio (100dB)

Audio Special Purpose Applications

• Multi-channel audio systems
• Professional audio equipment

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix '13TR' corresponds to the Tape & Reel packaging format as indicated in the manufacturer's order codes. Confirm that the component status is current or available through authorized distributors, as older revisions may have different availability statuses. Ensure compatibility with the required I2C bus voltage levels during system integration.

Audio Special Purpose Selection Notes

Select this component when a multi-channel electronic volume controller with digital interface is required. The 20-SOIC package is suitable for surface-mount assembly. Ensure the application design accounts for the recommended 10µF reference capacitor on the CREF pin for optimal performance, though 4.7µF may be used for faster power-on times. Verify that the supply voltage remains within the 4.75V to 10V range.

Audio Special Purpose Part Context

The TDA744813TR is the tape-and-reel variant of the TDA7448 series. The base TDA7448 is available in a SO-20 package, while the '13TR' suffix specifically denotes the reel packaging configuration for automated assembly. Both variants share identical electrical characteristics and pinouts.

Audio Special Purpose Replacement Considerations

Direct replacements include other parts in the TDA7448 family, such as the TDA7448 in loose SO-20 packaging. Cross-model alternatives like the PT2258 or SM7347 offer similar 6-channel functionality but may differ in interface protocols or power requirements.

Audio Special Purpose FAQ

What is the maximum attenuation range of the TDA744813TR?

The volume attenuation range is 0 to -79dB.

How is the volume control adjusted?

Volume control is adjusted in 1.0dB steps via the I2C serial bus interface.

What is the typical signal-to-noise ratio?

The signal-to-noise ratio is typically 100dB at Vout = 1Vrms.