STA333SML

Audio Special Purpose Overview

The STA333SML is a fully integrated digital audio system from STMicroelectronics, designed for high-efficiency amplification without external microcontrollers. It combines digital audio processing, amplifier control, and an FFX power output stage in a single chip. The device features two independent half-bridge stages capable of delivering up to 10 W + 10 W into 8 Ω loads. It accepts I²S serial audio data interfaces with sample rates from 32 to 48 kHz. Key electrical parameters include a supply voltage range of 4.5 V to 18 V, a 100 dB SNR, and peak efficiency exceeding 90%. The component operates within an ambient temperature range of 0°C to 70°C.

Audio Special Purpose Feature Summary

• Integrated FFX power output stage providing up to 20 W total stereo power (10 W per channel) into 8 Ω.
• Microless architecture eliminating the need for an external MCU, featuring automatic zero-detect mute and invalid input detect mute.
• I²S serial audio interface supporting 32 kHz to 48 kHz sample rates with fixed MCLK at 256 x fs.
• Advanced AM radio interference reduction modes and embedded thermal-overload and short-circuit protection.

Audio Special Purpose Applications

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

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix when purchasing. The base part number STA333SML typically refers to tube packaging, while the STA333SMLTR variant indicates tape and reel packaging. Confirm the package type matches the design requirements before placing orders.

Audio Special Purpose Selection Notes

Select this component for applications requiring a compact, cost-effective digital audio solution that does not rely on external processing controllers. Ensure the power supply can support the 4.5 V to 18 V range and that the PCB layout accommodates the CSP 5x6 array package dimensions for proper thermal management.

Audio Special Purpose Part Context

The STA333SML belongs to the Sound Terminal® family of products. This series focuses on providing full digital audio streaming directly to speakers with high quality and efficiency. The device represents a shift towards simplified system designs by integrating complex digital signal processing and power amplification onto a single die.

Audio Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics resources or authorized distributors for cross-reference information regarding compatible alternatives.