Design Win

2-channel high-efficiency digital audio system

Download datasheet Order Direct

Product overview


The STA333W is an integrated circuit comprising digital audio processing, digital amplifier control and DDX®power output stage to create a high-power, single-chip DDX®solution for all-digital amplification with high quality and high efficiency.

The STA333W power section consists of four independent half-bridges stages. These can be configured via digital control to operate in different modes. 2 channels can be provided by two full bridges, providing up to 20 W + 20 W of power.

Also provided in the STA333W are new advanced AM radio interference reduction modes. The serial audio data input interface accepts all possible formats, including the popular I2S format. Three channels of DDX®processing are provided.

The STA333W is part of the Sound Terminal™ family that provides full digital audio streaming to the speaker offering cost effectiveness, low power dissipation and sound enrichment.

  • All features

    • Wide supply-voltage range (4.5 V - 20 V)
    • 2 power output configurations
      • 2 channels of binary PWM (stereo mode)
      • 2 channels of ternary PWM (stereo mode)
    • PowerSSO-36 with exposed pad down
    • 2 channels of 24-bit DDX®
    • 100-dB SNR and dynamic range
    • Selectable 32- to 192-kHz input sample rates
    • I2C control with selectable device address
    • Digital gain -80 dB to +48 dB in 0.5-dB steps
    • Software volume update
    • Individual channel and master gain/attenuation
    • Individual channel and master software and hardware mute
    • Independent channel volume bypass
    • Automatic zero-detect mute
    • Automatic invalid input detect mute
    • 2-channel I2S input data Interface
    • Selectable clock input ratio
    • Input channel mapping
    • Automatic volume control for limiting maximum power
    • 96-kHz internal processing sample rate, 24-bit precision
    • Advanced AM interference frequency switching and noise suppression modes
    • Thermal-overload and short-circuit protection embedded
    • Video application: 576 * fSinput mode support

Circuit Diagram

EDA Symbols, Footprints and 3D Models

STMicroelectronics - STA333W

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Please select one model supplier :





3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PowerSSO 36 Industrial Ecopack2



PowerSSO 36

Material Declaration**:

Marketing Status



PowerSSO 36



RoHS Compliance Grade


(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Swipe or click the button to explore more details Don't show this again
Part Number
Marketing Status
Budgetary Price (US$)*/Qty
Order from ST
Order from distributors
Packing Type
Country of Origin
Available at distributors

Distributor availability of STA333W13TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

STA333W13TR Active

Budgetary Price (US$)*/Qty:
Packing Type:
Country of Origin:

Part Number:


Distributor Name

Distributor reported inventory date:

Swipe or click the button to explore more details Don't show this again

(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors