LM1973MX/NOPB

Audio Special Purpose Overview

The LM1973MX/NOPB is a CMOS-based, 3-channel audio attenuator manufactured by Texas Instruments. It provides a total attenuation range of 76 dB with integrated mute functionality. The device operates on a supply voltage ranging from 4.5 V to 12 V and supports an operating temperature range of 0°C to 70°C. It utilizes an SPI interface for digital control and is housed in a 20-SOIC package.

Audio Special Purpose Feature Summary

• Integrates three independent volume control channels within a single component
• Provides precise digital attenuation control via serial peripheral interface
• Includes dedicated mute function for signal path isolation

Audio Special Purpose Applications

• Consumer audio equipment volume management
• Professional audio system channel level adjustment
• Multi-zone audio distribution systems

Audio Special Purpose Procurement Notes

Verify the specific suffix against manufacturer documentation to confirm pinout compatibility and functional specifications. Ensure the selected variant matches the required supply voltage and interface protocol for the target application design.

Audio Special Purpose Selection Notes

Select this component for applications requiring multi-channel digital volume control with high attenuation ranges. Consider the 20-SOIC package constraints and SPI interface requirements when designing the host controller circuitry.

Audio Special Purpose Part Context

This part belongs to the LM1973 family of audio special purpose ICs designed for precision volume control. It serves as a digital solution for managing audio signal levels in complex audio architectures where multiple channels require synchronized or independent adjustment.

Audio Special Purpose Replacement Considerations

LM1972M/NOPB is a documented substitute offering similar volume control functions.