TS4975EIJT

Overview

The TS4975EIJT is a stereo headphone drive amplifier with digital volume control via I2C bus. It operates from VCC = 2.5V to 5.5V and delivers up to 102mW per channel into a 16 Ω single-ended load with 1% THD+N from a 5V power supply. The device features ultra-low standby consumption of 0.6µA, pop & click noise reduction, and internal thermal shutdown protection. It is packaged in a 1.8mm X 2.3mm Flip Chip package.

Feature Summary

• Stereo audio headphone driver capable of delivering continuous average power into single-ended or phantom ground loads
• Digital volume control range from -34dB to +18dB with 14-step adjustment via I2C interface
• Phantom ground configuration eliminates bulky output capacitors
• Pop & click noise reduction circuitry minimizes audible transients during power-up and standby

Applications

• Mobile phones (cellular / cordless)
• PDAs
• Laptop/notebook computers
• Portable audio devices

Procurement Notes

Verify component status as obsolete before procurement planning. Confirm availability through authorized distributors or secondary market channels. Ensure design-in compatibility with existing I2C bus architectures and physical footprint constraints for the flip-chip package. Review datasheet revisions for any updates to electrical characteristics or application notes prior to finalizing specifications.

Selection Notes

Select this component for space-constrained portable applications requiring integrated digital volume control. Evaluate power supply voltage ranges against target system requirements. Consider output mode configurations (single-ended vs. phantom ground) based on external capacitor constraints. Verify I2C address settings if multiple units are present on the same bus.

Part Context

The TS4975 belongs to STMicroelectronics' portfolio of audio amplifiers designed for mobile and portable electronics. It integrates stereo amplification with digital control capabilities, reducing the need for external components compared to traditional analog volume control solutions. The flip-chip packaging supports miniaturization trends in handheld devices.

Replacement Considerations

TS4975EIJT is listed as an obsolete product. No specific public confirmed substitute part numbers are provided in the source material.