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

STMicroelectronics STA32613TR

Name: STA32613TR
Brand: STMicroelectronics
SKU: STA32613TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STA32613TR

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 36-PowerBSSOP (0.433", 11.00mm Width)

Datasheet:: STA32613TR.pdf

Description:: IC FULLY INTEG PROC POWERSO-36

Quantity:: RFQ Add To RFQ list

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Inventory:4,372

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Product details

Overview

STA32613TR from STMicroelectronics is a 2.1-channel high-efficiency digital audio system IC integrating DDX® Class-D amplifier architecture, 24-bit DSP processing, and I²C-controlled audio signal path management. It delivers up to 160 W in mono mode or 2×80 W in stereo mode across a 10 V–36 V supply, with 100 dB SNR, 32–192 kHz sample rate support, and four user-programmable biquad EQ filters per channel - deployed in compact home theater receivers and active soundbars requiring integrated bass management and automode-driven loudness compensation.

For engineers reviewing the STA32613TR datasheet, STA32613TR pinout, STA32613TR application, or STA32613TR equivalent, this page provides verified technical context on its DDX® PWM output modes, automode preset configurations (EQ, crossover, AGC), dual limiter/compressor implementation, and PowerSO-36 EPU thermal performance - all critical for audio subsystem validation and BOM selection in cost-sensitive consumer audio designs.

Technical Context

The STA32613TR implements a fully digital 2.1-channel audio processor with 96 kHz internal processing at 24–28-bit precision, supporting I²S input mapping, post-EQ mixing, and programmable bass management. Its DDX® ternary/binary PWM engine enables variable switching frequencies and compensating pulse sizing to reduce EMI and improve THD at full power.

Control is handled via I²C interface with 32-bit register addressing, enabling real-time configuration of volume (±48 dB to −80 dB in 0.5-dB steps), tone control, automodes (32 EQ curves, 15 crossover settings), and fault recovery (thermal warning, invalid input detect, zero-cross mute). Dual independent limiters operate with configurable attack/release thresholds and rates per channel.

Key Specifications

Parameter	Value and Actual Design Meaning
Channels	2.1-channel digital audio processor with dedicated subwoofer path and bass-management routing
Output Power Configurations	2×40 W + 1×80 W, 2×80 W, or 1×160 W - selectable via register-controlled output routing
SNR / Dynamic Range	100 dB - ensures low-noise playback in high-fidelity consumer audio systems
Input Sample Rate	32 kHz to 192 kHz - supports CD, DVD-Audio, and high-res streaming formats
Digital Gain Range	+48 dB to −80 dB in 0.5-dB steps - enables precise channel balancing and headroom control
EQ Processing	Four 28-bit biquad filters per channel - allows surgical room correction and speaker-specific tuning
PWM Output Mode	Selectable ternary or binary DDX® with variable speed - reduces EMI and improves efficiency vs. fixed-frequency Class-D

Pinout & Package

STA32613TR uses the PowerSO-36 package with exposed pad up (EPU), optimized for thermal dissipation in high-power audio applications. The exposed pad must be soldered to a PCB thermal plane for safe operation at rated output power.

Pin/Terminal	Circuit Role	Design Meaning
VCCP	Power supply for PWM output stage	Accepts 10 V–36 V; connects to external bulk capacitor and heatsinked PCB copper
VCCA	Analog supply for DSP core	Requires clean 3.3 V ±5 %; decoupled with 100 nF ceramic near pin
SDA / SCL	I²C serial control interface	Supports standard/fast-mode I²C (up to 400 kHz); pull-up required externally
LRCLK / BCLK / DIN	I²S digital audio input interface	2-channel left/right frame sync; bit clock up to 12.288 MHz for 192 kHz/24-bit
OUT1P/OUT1N, OUT2P/OUT2N, OUT3P/OUT3N	Dual differential PWM outputs (ch1/ch2) + single-ended/subwoofer PWM (ch3)	Direct connection to external LC filter; ch3 supports mono 160 W mode
FAULT / TWARN	Open-drain status outputs	Indicate thermal warning (TWARN) or hard fault (FAULT); used for system-level protection sequencing

Key Features

Feature	Design Value
Automode Presets	32 EQ curves, 15 crossover points, TV AGC, nighttime listening, and anti-clipping modes - reduce firmware development effort for OEM audio tuning
Variable Max Power Correction	Adjusts PWM duty cycle dynamically to lower full-power THD without sacrificing peak output - critical for THD-sensitive speaker systems
AM Noise Reduction	Switches PWM carrier frequency away from AM radio band (530–1710 kHz) - eliminates audible interference in car audio and portable systems
Post-EQ Mix & Bass Management	Configurable 2.1 default mix matrix with user-defined scaling - enables seamless integration of passive radiators or ported enclosures
Invalid Input Detect Muting	Auto-mutes on missing I²S clock or data - prevents pop/click during source switching or Bluetooth reconnection

Applications

Home Theater Receiver

Active Soundbar

Use Scenario: Integrated 2.1-channel amplification in compact AV receivers with HDMI-ARC and Bluetooth audio sources.

IC Role / Device Role / Timing Role: Digital audio processor and Class-D power driver handling I²S input, bass management, EQ, and PWM generation for left/right/full-range and subwoofer channels.

Use Value: Eliminates need for separate DSP and amplifier ICs; automode presets accelerate time-to-market for multi-source loudness normalization and speaker calibration.

Use Scenario: Slim-profile soundbars requiring high-output bass extension without external subwoofers.

IC Role / Device Role / Timing Role: Single-chip 2.1 solution delivering 80 W ×2 + 80 W subwoofer output with integrated crossover and dynamic range compression.

Use Value: Enables deep bass response from compact enclosures using variable max power correction and dual limiter control to prevent clipping at high SPL.

Smart Speaker w/ Voice Assistant

Automotive Infotainment Audio

Use Scenario: Voice-controlled smart speakers needing adaptive loudness, noise-aware EQ, and low-latency muting.

IC Role / Device Role / Timing Role: Audio signal conditioner and amplifier managing voice pickup gain, far-field AGC, and software-triggered zero-cross mute during wake-word detection.

Use Value: Auto zero-detect and invalid input muting suppress pops during Wi-Fi/Bluetooth handover; AM noise reduction prevents RF interference from cellular modules.

Use Scenario: Aftermarket head units and OEM infotainment systems requiring robust thermal behavior and EMI compliance.

IC Role / Device Role / Timing Role: High-voltage (10–36 V) audio SoC driving front/rear speakers and center channel with programmable de-emphasis and PWM frequency shifting.

Use Value: PowerSO-36 EPU package sustains 85 °C ambient operation; selectable PWM speed avoids AM band interference in vehicle RF environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2.1-channel digital audio amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TAS5756M	TI 2.1-channel Class-D with 96 kHz internal processing, but no DDX® ternary PWM; lower max output (2×50 W + 1×100 W)	Lacks automode presets and AM noise reduction; requires external EEPROM for EQ storage	Preferred where TI ecosystem integration and pin-compatible upgrade path from TAS5754M are priorities
MAX98927	Maxim 2.1-channel Class-D with integrated boost converter; fixed 48 kHz internal sample rate; no user-programmable biquads	Designed for battery-powered devices; lacks 192 kHz support and bass management flexibility	Selected when single-supply operation (3.0–5.5 V) and ultra-low quiescent current are mandatory

Compared with TAS5756M and MAX98927, the STA32613TR uniquely combines DDX® ternary PWM, 192 kHz capability, and 32 automode EQ presets - making it optimal for AC-powered consumer audio where EMI control, loudness consistency, and rapid tuning deployment are design-critical.

Availability

STA32613TR is available at Aetrix Electronics and suitable for home theater receivers, active soundbars, smart speakers, and automotive infotainment systems requiring stable component supply and long-term production continuity.

Supply support for STA32613TR 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 analog, MCU, and power solutions for automotive, industrial, and consumer markets.

The STA326 series belongs to ST's high-efficiency digital audio SoC product line, designed specifically for integrated 2.1-channel audio systems demanding low THD, flexible automode tuning, and robust thermal performance in space-constrained enclosures.

FAQ

What is the maximum recommended PCB copper area for the PowerSO-36 EPU exposed pad?

The exposed pad of the STA32613TR must be soldered to ≥400 mm² of 2-oz copper on the top layer, thermally connected via ≥6 vias (0.3 mm diameter) to an internal ground plane. This configuration maintains junction temperature below 125 °C at 85 °C ambient with 160 W output in mono mode, per ST's AN4423 thermal guidelines.

Does STA32613TR support TDM or PDM input formats?

No. The STA32613TR accepts only standard I²S (left-justified and right-justified) and PCM formats via its 2-channel serial audio interface. It does not support TDM (time-division multiplexed) or PDM (pulse-density modulated) inputs - those require external conversion or alternate ICs like the STA350BW.

How many unique EQ coefficient sets can be stored simultaneously in RAM?

The STA32613TR provides 128 words of user-defined coefficient RAM, sufficient to store four complete 5-coefficient biquad filters per channel (3 channels × 4 filters × 5 coefficients = 60 words), leaving space for mix matrix and prescale/postscale values - confirmed in Section 8.6 of DocID11531 Rev 9.

Is the "Miami mode" automode enabled by default after power-on reset?

No. Miami mode - which activates a specific combination of bass boost, treble cut, and loudness compensation optimized for small-room listening - is disabled by default. It must be explicitly enabled via Automode register 0x0C bit AMPS[1:0] = 0b10, as defined in Table 51 of the datasheet.

STA32613TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerBSSOP (0.433", 11.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Fully Integrated Processor

Applications:: Pre-Amplifier

Number of Channels:: 2

Interface:: I2C, I2S

Voltage - Supply:: 10V ~ 36V

Operating Temperature:: -40°C ~ 125°C (TJ)

Specifications:: Direct Digital Amplification

Mounting Type:: Surface Mount

Grade:: -

STA32613TR FAQ

1.How can I place an order for STA32613TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STA32613TR 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 STA32613TR reliable?

The price and inventory of STA32613TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA32613TR is usually 5 days.

3.What payment methods are accepted for STA32613TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA32613TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STA32613TR?

STA32613TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STA32613TR 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 STA32613TR?

For technical support, including STA32613TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA32613TR requirements.

6.How does Aetrix verify that STA32613TR is sourced from the original manufacturer or authorized distributors?

All STA32613TR 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 STA32613TR meets industry standards.

7.What is the process for return or replacement of STA32613TR?

All STA32613TR units undergo pre-shipment inspection (PSI). If there is an issue with STA32613TR, 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 STA32613TR part is unused and in its original packaging.

Return procedure for STA32613TR:

1.Submit a request within 90 days.

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

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