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

STMicroelectronics TDA746913TR

Name: TDA746913TR
Brand: STMicroelectronics
SKU: TDA746913TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA746913TR

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 24-SSOP (0.209", 5.30mm Width)

Datasheet:: TDA746913TR.pdf

Description:: IC AUDIO TONE PROCESSOR 24SSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TDA746913TR from STMicroelectronics is a low-voltage analog audio processor with integrated headphone power amplifier, designed for portable systems. It provides stereo input/output, programmable bass (0–14 dB boost) and treble (0–12 dB boost) control, 1 dB-step volume adjustment (−63 to +6 dB), mute/standby functions, and bass automatic level control (ALC) via dedicated pin - all controlled via I²C serial bus.

For engineers reviewing the TDA746913TR datasheet, TDA746913TR pinout, TDA746913TR application, or TDA746913TR equivalent, key selection criteria include its SSOP24 package, 2.4 V typical supply operation, 10 mW max headphone output power at 10% THD, −90 dB mute attenuation, and BIPOLAR/CMOS process enabling low distortion (0.1–0.5% THD) and low noise (5–10 µV).

Technical Context

The TDA746913TR integrates dual-channel analog signal conditioning (input muxing, tone filtering, volume scaling) with a Class-AB headphone driver. Its bass and treble filters use external RC networks to set center frequency and Q-factor, while internal op-amps and switched resistor networks implement programmable gain stages.

Control logic resides in an I²C decoder with latches; register mapping supports independent configuration of volume, tone, input selection, mute, stand-by, and ALC parameters. The ALC circuit includes selectable attack/release resistors (12.5–100 kΩ), threshold levels (0.45–1.10 V), and feedback gain options (×1 or ×2).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	1.8–5.0 V - supports single-cell Li-ion or dual-cell alkaline portable power rails
Output Power	5–10 mW per channel into 16 Ω - sufficient for low-power headphones without external amplification
Volume Range	−63 to +6 dB in 1 dB steps - enables precise loudness matching across diverse source levels
Bass/Treble Boost	0–14 dB / 0–12 dB - adjustable via I²C to compensate for speaker/headphone frequency response deficiencies
Mute Attenuation	90 dB - ensures complete audio silence during system sleep or channel switching
THD+N	0.1–0.5% at 1 kHz, 0.1 Vrms input - meets fidelity requirements for consumer portable audio
Channel Separation	50 dB - maintains stereo imaging integrity in compact PCB layouts

Pinout & Package

Package: SSOP24 (Shrink Small Outline Package), 8.2 mm × 7.8 mm body, 0.65 mm pitch, 1.75 mm height - optimized for space-constrained portable PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1, 10, 15, 24	VS / PVS-L / PVS-R / CREF	Power supply inputs for core logic, left/right headphone drivers, and reference voltage generation
2–3, 22–23	IN1-L / IN1-R / IN2-L / IN2-R	Stereo dual-input channels with selectable −6 dB attenuation via I²C
4, 21	MUX-L / MUX-R	Analog multiplexer outputs feeding tone/volume processing blocks
5, 20	TREBLE-L / TREBLE-R	Filtered treble signal outputs - require external 3.3 nF capacitor for 10 kHz center frequency
6–7, 18–19	BASSI-L / BASSO-L / BASSI-R / BASSO-R	Internal bass filter input/output nodes - connect external 68 nF capacitors and 25 kΩ resistors
8–9, 16–17	PGND-L / OUT-L / PGND-R / OUT-R	Dedicated power ground and amplified headphone output pins - minimize crosstalk between channels
11–14	SDA / SCL / ALC / GND	I²C data/clock interface and bass ALC control pin - ALC pin sets operating mode (volume/bass/fc shift)

Key Features

Feature	Design Value
Software-programmable tone control	Independent 0–14 dB bass and 0–12 dB treble boost via I²C registers - eliminates manual trimmer potentiometers
Bass Automatic Level Control (ALC)	Configurable attack/release timing (12.5–100 kΩ), four threshold levels, and ×1/×2 feedback gain - prevents low-frequency clipping in dynamic audio
Low-noise headphone driver	5–10 mW output into 16/32 Ω with 5–10 µV output noise (20 Hz–20 kHz) - enables direct drive of earbuds without added amplification
DC step-free volume control	1 dB resolution over 69 dB range using switched resistor networks and op-amp buffering - avoids audible zipper noise during adjustment
Multi-mode mute and stand-by	Three mute types (input, soft, output) and full-circuit stop mode - reduces quiescent current to 40 µA in standby

Applications

Portable Media Players

Bluetooth Headphone Adapters

Use Scenario: Compact MP3/WMA players with dual-line-in sources and headphone output.

IC Role / Device Role / Timing Role: Audio signal conditioner and headphone driver - processes stereo input, applies user-selectable tone/volume, and drives 16 Ω earphones.

Use Value: Eliminates need for discrete op-amps, tone caps, and external DAC interface logic; reduces BOM count by ≥7 passive components per channel.

Use Scenario: Low-cost Bluetooth receiver dongles adding analog audio output to legacy devices.

IC Role / Device Role / Timing Role: Post-DAC analog stage - accepts I²S or PCM input (via external DAC), performs volume/tone correction, and delivers clean headphone drive.

Use Value: Enables 90 dB mute isolation and 1 dB volume precision without MCU firmware overhead - simplifies host-side audio control stack.

USB-C Audio Adapters

Smart Speaker Auxiliary Inputs

Use Scenario: USB-C to 3.5 mm analog adapters supporting high-resolution playback.

IC Role / Device Role / Timing Role: Final analog conditioning block - receives buffered DAC output, applies bass/treble compensation for transducer mismatch, and drives line/headphone loads.

Use Value: Provides adaptive bass ALC to prevent excursion damage in small-form-factor speakers driven from variable-level USB audio sources.

Use Scenario: Secondary analog input path on smart speakers with multiple source options (e.g., aux-in alongside Bluetooth/WiFi).

IC Role / Device Role / Timing Role: Input selector and level optimizer - switches between two stereo sources, normalizes amplitude, and applies room-tuned EQ before mixing.

Use Value: Delivers 50 dB channel separation and −75 dB ripple rejection on PVS rail - prevents digital switching noise from modulating analog audio paths.

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo audio processor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AK4413VN	Integrated 24-bit DAC + headphone amp; no analog tone control; I²C programmable volume only	Requires external analog tone circuitry for bass/treble adjustment; higher supply current (12 mA vs 8 mA)	Select when digital audio interface (I²S) is available and tone processing is handled upstream
CS43L22-CNZ	Delta-sigma DAC + Class-G headphone amp; fixed 0–12 dB treble, no bass ALC; SPI/I²C interface	Lacks dedicated bass ALC pin and programmable bass boost; uses different capacitor network values (10 nF vs 68 nF)	Select for lower THD (0.003%) and higher output power (25 mW), but requires redesign of tone filter layout

Compared with AK4413VN and CS43L22-CNZ, the TDA746913TR uniquely combines analog tone processing, bass ALC with pin-configurable modes, and ultra-low quiescent current (40 µA standby) - making it optimal for battery-powered devices requiring analog-domain EQ without DAC integration.

Availability

TDA746913TR is available at Aetrix Electronics and suitable for portable media players, Bluetooth audio adapters, USB-C analog dongles, and smart speaker auxiliary inputs requiring stable component supply and long-term lifecycle support.

Supply support for TDA746913TR 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 headquartered in Geneva, Switzerland, specializing in automotive, industrial, and consumer ICs with emphasis on power efficiency and system integration.

The TDA746913TR belongs to ST's audio signal processing product line, engineered specifically for low-voltage portable audio systems needing analog tone control, headphone drive, and I²C configurability - not general-purpose op-amps or digital audio subsystems.

FAQ

What is the minimum supply voltage required for functional operation of the TDA746913TR?

The TDA746913TR operates down to 1.8 V on the VS supply pin, with guaranteed functionality across all features including tone control, volume stepping, and headphone output. At 1.8 V, maximum output power drops to 5 mW into 16 Ω, and THD remains ≤0.5% at 1 kHz. Below 1.8 V, the internal biasing fails and the device ceases analog signal processing.

How does the ALC pin (Pin 13) affect bass processing behavior?

Pin 13 (ALC) configures three operational modes: logic low selects volume-dependent ALC triggering, logic high enables bass-dependent ALC, and a rising edge shifts bass center frequency. This pin directly controls the ALC detector's reference point and feedback gain multiplier - no I²C command can override its state, making it a hardware-level function selector.

Can the TDA746913TR drive 32 Ω headphones effectively?

Yes - the TDA746913TR delivers 5–10 mW into 32 Ω at 10% THD, with measured THD+N of 0.1–0.5% at 1 kHz and 0.1 Vrms input. Output impedance is <2 Ω, ensuring damping factor >16, and channel separation remains 50 dB. External 220 µF output coupling capacitors are mandatory for DC blocking at this load.

Is the I²C interface compatible with standard 100 kHz and 400 kHz clock rates?

Yes - the SDA and SCL pins meet standard I²C specifications: VIH = 1.9 V min, VIL = 0.5 V max, and input leakage ≤±5 µA. The internal decoder supports standard-mode (100 kHz) and fast-mode (400 kHz) operation. No pull-up resistors are integrated; external 4.7 kΩ pull-ups to VS are required per bus specification.

TDA746913TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 24-SSOP (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Audio Tone Processor

Applications:: Consumer Audio

Number of Channels:: 2

Interface:: I2C

Voltage - Supply:: 1.8V ~ 5V

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

Specifications:: ALC Surround

Mounting Type:: Surface Mount

Grade:: -

TDA746913TR FAQ

1.How can I place an order for TDA746913TR through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA746913TR 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 TDA746913TR reliable?

The price and inventory of TDA746913TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA746913TR is usually 5 days.

3.What payment methods are accepted for TDA746913TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA746913TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA746913TR?

TDA746913TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA746913TR 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 TDA746913TR?

For technical support, including TDA746913TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA746913TR requirements.

6.How does Aetrix verify that TDA746913TR is sourced from the original manufacturer or authorized distributors?

All TDA746913TR 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 TDA746913TR meets industry standards.

7.What is the process for return or replacement of TDA746913TR?

All TDA746913TR units undergo pre-shipment inspection (PSI). If there is an issue with TDA746913TR, 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 TDA746913TR part is unused and in its original packaging.

Return procedure for TDA746913TR:

1.Submit a request within 90 days.

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

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