STA333IS

Audio Special Purpose Overview

The STA333IS is a fully integrated digital audio processor and amplifier from STMicroelectronics' Sound Terminal family. It combines digital audio processing, amplifier control, and an FFX power output stage into a single chip. The device features four independent half-bridge stages configured as two full bridges, delivering up to 10 W + 10 W into 8 Ω loads. It supports a wide supply voltage range of 4.5 V to 20 V and accepts serial audio data via the I2S interface. Key performance metrics include a 100 dB SNR, selectable input sampling rates from 32 kHz to 192 kHz, and embedded protection against thermal overload and short circuits.

Audio Special Purpose Feature Summary

• Delivers 10 W + 10 W output power using two full-bridge configurations with 24-bit FFX processing
• Supports wide-range supply voltage (4.5 V - 20 V) and I2S serial audio input
• Includes advanced modes for reducing AM radio interference and automatic mute functions
• Features embedded thermal-overload and short-circuit protection with startup detection

Audio Special Purpose Applications

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

Audio Special Purpose Procurement Notes

Verify the specific package variant, as the model may be available in PowerSSO-36 or CSPBGA formats. Confirm the operating temperature range matches the application requirements, typically 0°C to 70°C. Ensure the design accounts for the exposed pad thermal management if using surface-mount packages. Check for any specific ordering suffixes that might indicate tape-and-reel quantities or extended temperature grades.

Audio Special Purpose Selection Notes

Select the STA333IS when a microcontroller-free digital audio solution is required for stereo applications. It is suitable for designs needing high efficiency and low distortion without external DSP components. Consider the 10 W per channel output capability against load impedance and supply voltage constraints. Evaluate the need for AM interference suppression features if used in environments with strong RF signals.

Audio Special Purpose Part Context

The STA333IS belongs to the Sound Terminal family, which focuses on providing cost-effective, low-power dissipation digital audio streaming solutions. This series integrates digital signal processing with Class-D amplification to simplify system architecture by eliminating the need for separate audio processors or analog pre-amplifiers in many consumer electronics applications.

Audio Special Purpose Replacement Considerations

The STA333ML is a related component in the same family but offers higher power output (2 x 20 W) and uses a PowerSSO-36 package. Verify pin compatibility and thermal requirements when substituting between these models, as the package types and power capabilities differ significantly.