STA333SML TR

Audio Special Purpose Overview

The STA333SML TR is a fully integrated digital audio processor and amplifier from the Sound Terminal family, designed for high-efficiency all-digital amplification. It features an FFX power output stage with four independent half-bridge stages to deliver up to 10 W + 10 W into 8 Ω loads. The device operates on a wide supply voltage range of 4.5 V to 18 V and accepts I²S serial audio data interfaces. Key electrical specifications include a 100 dB SNR, 24-bit FFX processing, and a fixed master clock ratio of 256 x fs. It includes embedded thermal-overload and short-circuit protection.

Audio Special Purpose Feature Summary

• FFX Power Output: Two channels of 24-bit FFX processing with up to 10 W + 10 W output power.
• High Efficiency: Peak efficiency greater than 90% in FFX mode with low power dissipation.
• Digital Audio Interface: Accepts standard I²S formats with automatic zero-detect mute and invalid input detect mute.
• Protection Features: Includes short-circuit detection at startup, thermal overload protection, and overvoltage/undervoltage protection.

Audio Special Purpose Applications

• LCD televisions
• DVD players
• Digital speakers
• Wireless speaker cradles

Audio Special Purpose Procurement Notes

Verify component status as the product may be discontinued at certain distributors. Confirm package type (CSP 5x6 array) and packaging format (Tape & Reel) match design requirements. Ensure supply voltage and interface protocols align with system specifications before procurement.

Audio Special Purpose Selection Notes

Select this component for applications requiring a microcontroller-free digital audio solution. Verify that the load impedance matches the 8 Ω specification for optimal power delivery. Ensure the host system provides a compatible I²S interface with a fixed MCLK of 256 x fs.

Audio Special Purpose Part Context

The STA333SML belongs to the Sound Terminal family, which focuses on cost-effective, low-power digital audio streaming. It integrates digital DSP, amplifier control, and power output stages into a single chip, eliminating the need for external microcontrollers in basic audio terminal applications.

Audio Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult STMicroelectronics for current alternatives if this specific package or revision is unavailable.