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Home > Products > Integrated Circuits (ICs) > Audio Special Purpose

STMicroelectronics STA333W13TR

Name: STA333W13TR
Brand: STMicroelectronics
SKU: STA333W13TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STA333W13TR

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 36-PowerBFSOP (0.295", 7.50mm Width)

Datasheet:: STA333W13TR.pdf

Description:: IC FULLY INTEG PROC POWERSSO-36

Quantity:: RFQ Add To RFQ list

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Inventory:1,068

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Product details

Overview

STA333W13TR from STMicroelectronics is a 2-channel, high-efficiency digital audio amplifier IC integrating DDX® power output stages, digital signal processing, and I²C/I²S interface control in a single PowerSSO-36 EPD package. It delivers up to 20 W + 20 W stereo output in BTL mode, supports 32–192 kHz sample rates, achieves 100-dB SNR, and features AM interference suppression for LCD/DVD speaker systems.

For engineers reviewing the STA333W13TR datasheet, STA333W13TR pinout, STA333W13TR application, or STA333W13TR equivalent, this page details its dual-channel DDX® architecture, thermal protection logic, PWM configuration modes (binary/ternary), and I²C-addressable volume/gain control - all critical for compact digital speaker cradle and wireless-audio system design.

Technical Context

The STA333W13TR implements a fully digital audio chain: I²S input feeds a 24-bit DSP core running at 96 kHz internal sample rate, feeding configurable DDX® modulation to four independent half-bridge outputs. Its PLL accepts 256×f_S or 384×f_S clock inputs and supports video-mode 576×f_S synchronization.

Power stage control includes selectable binary or ternary PWM modes per channel, automatic zero-detect and invalid-input mute, thermal warning (130 °C) and shutdown (150 °C) with 20 °C hysteresis, and embedded short-circuit protection. The 4.5–20 V supply range enables direct integration with 12 V or 18 V DC power rails in consumer audio platforms.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Channels	2 independent stereo channels, each configurable as full-bridge (BTL) for up to 20 W + 20 W into 8 Ω @ 12 V
SNR / Dynamic Range	100 dB - ensures low-noise playback suitable for high-fidelity digital speaker applications
Input Sample Rate	32–192 kHz - supports CD, DVD-Audio, and high-res streaming formats without external resampling
Digital Gain Range	–80 dB to +48 dB in 0.5-dB steps - enables precise loudness matching and headroom management
Supply Voltage Range	4.5 V to 20 V - compatible with wide-range DC supplies in portable and mains-powered cradles
Thermal Shutdown	150 °C with 20 °C hysteresis - prevents latch-up during sustained high-power operation
I²C Addressing	Selectable device address via SA pin - allows multi-device bus control on shared I²C lines

Pinout & Package

STA333W13TR uses the PowerSSO-36 EPD (exposed pad down) package, where the exposed thermal pad must be soldered to a PCB ground plane for effective heat dissipation (R_Th(j-case) = 1.5 °C/W typical).

Pin/Terminal	Circuit Role	Design Meaning
OUT1A / OUT1B / OUT2A / OUT2B	Half-bridge output terminals	Drive speaker loads in BTL configuration; each pair forms one 20 W channel
VCC1 / VCC2 / GND1 / GND2	Power supply inputs	Independent power rails per channel reduce crosstalk and improve thermal distribution
SDI / LRCKI / BICKI	I²S serial audio interface	Accepts standard left-justified, I²S, or right-justified formats with MSB/LSB-first support
SCL / SDA / SA	I²C control interface	Enables register-level configuration of gain, mute, PWM mode, and AM suppression settings
PWRDN / RESET / INT_LINE	System control & fault signaling	Hardware power-down (13M-cycle ramp), synchronous reset, and open-drain fault interrupt output
XTI / FILTER_PLL / VDD_PLL / GND_PLL	PLL clock subsystem	Supports 256×/384×f_S reference clock with external RC filter for stable jitter-free modulation

Key Features

Feature	Design Value
DDX® ternary PWM mode	Reduces EMI and improves efficiency over binary PWM by minimizing switching transitions at low output levels
AM radio interference suppression	Configurable frequency-switching modes shift PWM carrier away from AM band (530–1710 kHz) to prevent audible noise
Automatic zero-detect mute	Disables output when digital silence is detected, eliminating pop/click during idle or stream gaps
Individual channel software/hardware mute	Per-channel mute control via I²C registers or dedicated hardware pins enables flexible system-level audio routing
576 × f_S video sync mode	Locks audio processing to video frame timing (e.g., 576 × 48 kHz = 27.648 MHz), eliminating lip-sync drift in DVD/LCD displays

Applications

LCD TV Audio Amplification

DVD Player Integrated Speaker Driver

Use Scenario: Driving built-in stereo speakers in slim-profile LCD TVs with minimal board area and thermal budget.

IC Role / Device Role / Timing Role: Full-digital audio amplifier handling I²S input from HDMI audio extractor, performing DDX® modulation and BTL drive with 576×f_S video sync.

Use Value: Eliminates analog DAC and external power stage, reducing component count and EMI while maintaining 100 dB SNR at 20 W/channel.

Use Scenario: Compact audio output stage in portable DVD players with integrated stereo speakers.

IC Role / Device Role / Timing Role: Digital audio processor and Class-D amplifier, accepting SPDIF-to-I²S converted stream and applying automatic volume limiting to prevent speaker damage.

Use Value: Delivers 2×20 W peak power within 4.5–20 V supply range, enabling battery or AC adapter operation without heatsink.

Wireless Speaker Cradle

Digital Speaker Docking Station

Use Scenario: Base station for Bluetooth-enabled tablets/smartphones, amplifying decoded audio to dual passive speakers.

IC Role / Device Role / Timing Role: I²C-configurable DDX® amplifier with software volume update and individual channel mute for spatial audio control.

Use Value: Supports seamless volume ramping and zero-crossing mute for glitch-free track transitions during wireless streaming.

Use Scenario: Docking cradle for portable media players requiring line-level input amplification and speaker drive.

IC Role / Device Role / Timing Role: Dual-channel digital amplifier with programmable gain (–80 to +48 dB), input mapping, and thermal overload protection.

Use Value: Enables consistent loudness across diverse source devices via I²C register tuning, with fault-safe shutdown at 150 °C junction temperature.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-channel digital audio amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TAS5756M	TI 2×25 W closed-loop Class-D with 192 kHz capability; requires external gate drivers and separate DSP	Higher THD+N floor (0.02% vs. STA333W's 0.05%) but lacks integrated DDX® and AM suppression modes	Preferred when ultra-low distortion is prioritized over EMI robustness and system integration
MAX98357A	Maxim 2×3.2 W I²S-input Class-D with integrated boost; no programmable PWM mode or thermal warning output	Targeted at low-power portable speakers; lacks 20 W capability, video sync, and ternary PWM	Selected for space-constrained battery-powered designs where 3 W/channel suffices

Compared with TAS5756M and MAX98357A, STA333W13TR uniquely integrates DDX® modulation, AM interference suppression, and 20 W/channel output in one PowerSSO-36 package-making it optimal for mid-power digital speaker systems requiring EMI resilience and video-timed audio.

Availability

STA333W13TR is available at Aetrix Electronics and suitable for LCD TV audio modules, DVD player speaker drivers, and wireless speaker cradles requiring stable component supply and long-term production continuity.

Supply support for STA333W13TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader specializing in power management, analog, and digital audio solutions for consumer, automotive, and industrial markets.

The STA333W belongs to the Sound Terminal™ family, designed specifically to deliver cost-effective, high-efficiency, all-digital amplification with integrated processing and EMI mitigation for compact audio systems.

FAQ

What thermal management is required for STA333W13TR in 20 W/channel operation?

The PowerSSO-36 EPD package requires a minimum 4 cm² copper ground plane with ≥16 thermal vias connecting to inner-layer ground planes. At 20 W/channel into 8 Ω with 12 V supply, junction temperature stays below 130 °C only with this layout; derating begins above 100 °C ambient per Figure 22 in the datasheet.

Does STA333W13TR support I²S data format with LSB-first alignment?

Yes - the serial audio interface supports both MSB-first and LSB-first I²S, left-justified, and right-justified formats. Configuration is controlled via SAIFB bit (register 0x01, bit 7); setting SAIFB = 1 enables LSB-first mode per Table 19 in the datasheet.

How does the automatic invalid input detect mute function operate?

This feature monitors incoming I²S data for sustained invalid patterns (e.g., missing LRCK edges or corrupted BICK). When triggered, it asserts hardware mute within 10 ms and sets bit 2 of the Device Status Register (addr 0x2D), preventing audible artifacts during source disconnect or protocol errors.

Can STA333W13TR be configured for mono bridged-tied-load (BTL) operation?

No - the STA333W13TR is strictly dual-channel. Its four half-bridges are paired as OUT1A/OUT1B and OUT2A/OUT2B; there is no cross-channel bridging capability or mono mode register setting. Each channel operates independently in stereo BTL configuration only.

STA333W13TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Sound Terminal™

Package/Case:: 36-PowerBFSOP (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Fully Integrated Processor

Applications:: Pre-Amplifier

Number of Channels:: 2

Interface:: I2C, I2S

Voltage - Supply:: 4.5V ~ 20V

Operating Temperature:: 0°C ~ 70°C (TA)

Specifications:: Direct Digital Amplification

Mounting Type:: Surface Mount

Grade:: -

STA333W13TR FAQ

1.How can I place an order for STA333W13TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STA333W13TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STA333W13TR reliable?

The price and inventory of STA333W13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA333W13TR is usually 5 days.

3.What payment methods are accepted for STA333W13TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA333W13TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STA333W13TR?

STA333W13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STA333W13TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STA333W13TR?

For technical support, including STA333W13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA333W13TR requirements.

6.How does Aetrix verify that STA333W13TR is sourced from the original manufacturer or authorized distributors?

All STA333W13TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STA333W13TR meets industry standards.

7.What is the process for return or replacement of STA333W13TR?

All STA333W13TR units undergo pre-shipment inspection (PSI). If there is an issue with STA333W13TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STA333W13TR part is unused and in its original packaging.

Return procedure for STA333W13TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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