TDA7449L

Audio Special Purpose Overview

The TDA7449L is a digitally controlled audio processor designed for quality consumer audio applications, such as TV systems. It features an input multiplexer with two stereo inputs and selectable gain, one stereo output, volume control in 1.0dB steps, and independent speaker attenuators for balance and mute functions. All operations are programmable via an I2C serial bus interface. The device utilizes Bipolar/CMOS technology to achieve low distortion, low noise, and DC stepping capabilities. It operates on a supply voltage of 6V to 10.2V within an ambient temperature range of 0°C to 70°C.

Audio Special Purpose Feature Summary

• Input Multiplexer: Supports two stereo inputs with selectable gain (0-30dB in 2dB steps) for source adaptation.
• Volume Control: Provides attenuation from 0dB to -47dB (mute) in 1.0dB resolution steps.
• Speaker Attenuators: Two independent channels allowing balance adjustment and individual mute functions in 1.0dB steps.
• I2C Interface: Fully programmable control via standard SDA and SCL lines.

Audio Special Purpose Applications

• TV systems
• Consumer audio equipment

Audio Special Purpose Procurement Notes

The TDA7449L is listed as an obsolete product by STMicroelectronics. Verification of availability requires checking distributor stock or secondary market sources. Designers should consider the discontinuation status when planning long-term production runs.

Audio Special Purpose Selection Notes

Select the TDA7449L for applications requiring digital volume and balance control with I2C integration. Ensure the power supply remains between 6V and 10.2V. Verify that the system design accommodates the 20-DIP package dimensions and through-hole mounting requirements.

Audio Special Purpose Part Context

This component belongs to the TDA7449 family of audio processors. The 'L' suffix denotes the DIP20 package variant. Other variants may exist in different packages, but this specific part number is restricted to the 20-DIP form factor.

Audio Special Purpose Replacement Considerations

As the product is obsolete, no direct active substitutes are confirmed in the provided documentation. Engineers must evaluate alternative audio processors with compatible I2C interfaces and pin configurations.

Audio Special Purpose FAQ

What is the maximum input signal handling capability?

The maximum input signal handling (VCL) is 2 V RMS.

How is the channel separation specified?

Channel separation is typically 90 dB at 1 kHz, with a minimum of 80 dB.

What is the mute attenuation level?

The mute attenuation is specified at 100 dB.