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

STMicroelectronics TDA7463D

Name: TDA7463D
Brand: STMicroelectronics
SKU: TDA7463D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7463D

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 16-SOIC (0.295", 7.50mm Width)

Datasheet:: TDA7463D.pdf

Description:: IC AUDIO TONE PROCESSOR 16SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TDA7463D from STMicroelectronics is a digitally controlled stereo audio processor IC for low-voltage portable systems, integrating volume control in 1 dB steps, programmable bass (0–14 dB boost) and treble (0–8 dB boost), bass automatic level control (ALC), mute, and stand-by functions-all managed via I²C serial bus. It operates from 1.8 V to 3 V supply and delivers ≤0.1% THD at 1 kHz with 80 dB signal-to-noise ratio and 80 dB channel separation.

For engineers reviewing the TDA7463D datasheet, TDA7463D pinout, TDA7463D application, or TDA7463D equivalent, key selection considerations include its I²C-programmable tone/volume/ALC architecture, SO16 package compatibility, low-voltage (1.8–3 V) operation, and integrated bass ALC threshold adjustment via dedicated ALC pin-critical for battery-powered audio front-ends requiring dynamic range management.

Technical Context

The TDA7463D implements a bipolar/CMOS analog signal path with digitally controlled resistor networks and operational amplifiers to achieve precise AC signal conditioning. Its I²C interface supports subaddress-based register mapping for independent control of volume (63 dB range), bass (three boost levels), treble (two boost levels), mute (≥80 dB attenuation), and stand-by (50 µA quiescent current).

Bass ALC functionality is externally configurable via the ALC pin, enabling selection among four input thresholds (0.07–0.2 V_rms) and three release currents (0.05–0.4 µA), while treble and bass center frequencies are set by external RC networks-not fixed internally-allowing system-level tuning of frequency response shape and Q factor.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	1.8–3 V: Enables direct integration into single-cell Li-ion or dual-cell alkaline portable systems without LDO overhead.
Volume Control Range	−63 to 0 dB in 1 dB steps: Provides fine-grained digital attenuation matching high-resolution DAC output stages.
Bass Boost Range	0–14 dB: Configurable via external feedback resistors and I²C register settings for tailored low-frequency enhancement.
Treble Boost Range	0–8 dB: Adjustable using external capacitors (C3/C4/C12) to set center frequency and slope independently per channel.
THD + N	≤0.1% at 1 kHz, 0.1 V_rms: Ensures clean audio reproduction in headphone and small speaker drive applications.
Signal-to-Noise Ratio	80 dB (all gains flat): Meets consumer-grade audio fidelity requirements for portable media players and Bluetooth speakers.
Channel Separation	80 dB at 1 kHz: Minimizes crosstalk between left/right paths in stereo signal chains.

Pinout & Package

Package: SO16 wide-body surface-mount (10.1 × 7.5 mm, 1.27 mm pitch), RoHS-compliant, with thermal resistance R_{th j-pin} = 85 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN-L)	Left-channel analog input	Differential-capable input stage with 35–65 kΩ impedance; accepts 0.2 V_rms max unclipped signal.
2 (TREBLE-L)	Left treble filter network connection	External RC node (C3/R1/C4) sets treble center frequency and boost slope for left channel.
3 (BASSI-L)	Left bass input feedback node	Connects to internal op-amp inverting input; defines bass gain via external R2/R3 network.
4 (BASSO-L)	Left bass output feedback node	Connects to internal op-amp non-inverting input; completes bass boost loop with BASSI-L.
5 (SDA)	I²C data line	Open-drain, 5 µA max input current; requires external pull-up to VS; supports standard-mode (100 kHz) I²C.
6 (OUT-L)	Left-channel analog output	Capacitively coupled (C7 = 22 µF); 0.2 V_rms clipping level, 10 kΩ load capability.
7 (SCL)	I²C clock line	Input-only, 0.5 V low / 1.9 V high logic thresholds; synchronizes all register writes and reads.
8 (GND)	Analog ground reference	Common return for all analog signal paths; must be separated from digital ground in PCB layout.
9 (ALC)	Bass ALC configuration pin	DC voltage selects ALC threshold (0.07–0.2 V_rms) and release current (0.05–0.4 µA) via resistor divider.
10 (CREF)	Reference capacitor connection	Connects 100 nF capacitor to stabilize internal bias generator; critical for ALC accuracy and noise immunity.
11 (BASSO-R)	Right bass output feedback node	Mirror of BASSO-L; enables independent right-channel bass boost tuning.
12 (OUT-R)	Right-channel analog output	Identical to OUT-L; supports symmetric stereo output drive with matched DC blocking (C8 = 100 nF).
13 (BASSI-R)	Right bass input feedback node	Mirror of BASSI-L; completes right-channel bass gain loop with external R4/R5 network.
14 (TREBLE-R)	Right treble filter network connection	Mirror of TREBLE-L; allows independent treble shaping for right channel using C10/R2/C11.
15 (IN-R)	Right-channel analog input	Identical to IN-L; full differential input capability with same 0.2 V_rms clipping limit.
16 (VS)	Positive supply rail	Single 1.8–3 V supply powers entire analog and digital blocks; no separate AVDD/DVDD required.

Key Features

Feature	Design Value
I²C programmable volume control	63 dB range in precise 1 dB increments, eliminating mechanical potentiometers and reducing BOM count.
Configurable bass ALC	Four selectable input thresholds and three release currents enable adaptive low-frequency compression for varying source levels.
Independent left/right tone control	Separate TREBLE-L/TREBLE-R and BASSI/BASSO pins allow asymmetric EQ tuning per channel for spatial audio compensation.
Low-voltage analog signal chain	Operates down to 1.8 V with <0.1% THD, enabling direct interface with modern low-power codecs and ADCs.
Integrated mute and stand-by	Hardware-mute attenuation ≥80 dB and 50 µA stand-by current extend battery life in portable standby modes.

Applications

Portable Media Player Audio Front-End

Bluetooth Speaker Tone Processor

Use Scenario: Stereo audio processing in compact MP3/WMA players with headphone and line-out outputs.

IC Role / Device Role / Timing Role: Central analog signal conditioner handling volume, bass/treble EQ, and mute under microcontroller I²C command.

Use Value: Eliminates discrete op-amps and potentiometers while delivering 80 dB SNR and 1 dB volume resolution for premium playback fidelity.

Use Scenario: Real-time tone shaping in battery-powered Bluetooth speakers with adaptive bass response.

IC Role / Device Role / Timing Role: I²C-controlled bass ALC processor that dynamically compresses low frequencies during loud passages to prevent speaker distortion.

Use Value: Maintains clean bass output up to 0.2 V_rms input with 14 dB boost and user-selectable ALC thresholds-no firmware algorithm needed.

USB-C Audio Dongle Signal Path

Smartphone Docking Station Audio Hub

Use Scenario: Compact USB-C to 3.5 mm analog audio adapter requiring minimal PCB area and low power draw.

IC Role / Device Role / Timing Role: Low-voltage (1.8 V) stereo processor bridging USB DAC output to headphone amplifier input with digital volume control.

Use Value: Single-supply operation eliminates level-shifting circuitry; 100 nF CREF capacitor ensures stable ALC reference for consistent tone behavior across devices.

Use Scenario: Multi-source docking station supporting HDMI audio extraction, USB audio, and 3.5 mm line-in with unified tone control.

IC Role / Device Role / Timing Role: Shared stereo tone processor accepting multiple analog inputs (IN-L/IN-R) and routing processed output to line-out and headphone amps.

Use Value: Independent BASSI/BASSO and TREBLE-L/TREBLE-R pins allow simultaneous EQ tuning for different sources without hardware reconfiguration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CS42L52-CQZ	Integrated stereo DAC + audio processor in QFN24; requires external 3.3 V supply; no dedicated ALC pin.	Targets higher-end portable designs needing DAC+processor integration; lacks standalone analog front-end flexibility.	Select when system requires combined DAC+EQ and can accommodate larger footprint and higher supply voltage.
MAX9850ETJ+	I²C-controlled stereo audio processor in TQFN28; 2.7–5.5 V operation; fixed 10 dB bass boost only.	Suited for industrial audio interfaces where wider supply range matters more than ALC configurability.	Select when operating above 3 V or requiring robust ESD tolerance (±8 kV HBM), but accept reduced bass control granularity.

Compared with CS42L52-CQZ and MAX9850ETJ+, the TDA7463D uniquely combines ultra-low-voltage operation (1.8 V), pin-configurable ALC, and fully independent left/right tone networks-making it optimal for space-constrained, single-cell battery systems demanding adaptive bass response without DAC integration.

Availability

TDA7463D is available at Aetrix Electronics and suitable for portable media players, Bluetooth speakers, USB-C audio dongles, and smartphone docking stations requiring stable component supply and long-term obsolescence management.

Supply support for TDA7463D 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog/mixed-signal products for automotive, industrial, and consumer markets.

The TDA7463D belongs to ST's legacy audio processor product line, engineered specifically for low-voltage, digitally controllable analog signal conditioning in portable consumer electronics-prioritizing power efficiency, PCB area reduction, and flexible tone shaping over integrated DAC or DSP functions.

FAQ

What is the minimum supply voltage required for reliable operation of the TDA7463D?

The TDA7463D operates reliably from 1.8 V to 3 V. Below 1.8 V, internal biasing fails-causing loss of I²C communication, degraded THD (>0.3%), and unstable ALC function. The datasheet specifies 1.8 V as absolute minimum; design margin recommends 2.0 V minimum for production use across temperature and process variation.

How does the ALC pin configure bass automatic level control?

The ALC pin accepts a DC voltage derived from a resistor divider between VS and GND. That voltage selects one of four input thresholds (0.07–0.2 V_rms) and three release currents (0.05–0.4 µA) per Table 9. No external op-amp or comparator is needed-the IC internally routes this setting to its ALC block.

Can the TDA7463D drive headphones directly without an external amplifier?

No. The TDA7463D outputs are line-level (0.2 V_rms clipping, 10 kΩ load capability) and lack current drive for headphones. It requires a downstream headphone amplifier (e.g., TPA6130A2) to deliver >15 mW into 16 Ω loads. Its C7/C8 output coupling capacitors also preclude DC-coupled headphone drive.

Is the TDA7463D still in active production or obsolete?

The TDA7463D is marked "Obsolete Product(s)" in ST's official documentation (Rev. 5, April 2010). However, Aetrix Electronics maintains legacy inventory with full traceability and offers lifecycle support-including last-time-buy planning and cross-reference assistance-for ongoing production programs dependent on this part.

TDA7463D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 16-SOIC (0.295", 7.50mm Width)

Packaging:: Tray

Product Status:: Obsolete

Function:: Audio Tone Processor

Applications:: Consumer Audio

Number of Channels:: 2

Interface:: I2C

Voltage - Supply:: 1.8V ~ 3V

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

Specifications:: -

Mounting Type:: Surface Mount

Grade:: -

TDA7463D FAQ

1.How can I place an order for TDA7463D through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7463D 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 TDA7463D reliable?

The price and inventory of TDA7463D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7463D is usually 5 days.

3.What payment methods are accepted for TDA7463D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7463D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7463D?

TDA7463D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7463D 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 TDA7463D?

For technical support, including TDA7463D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7463D requirements.

6.How does Aetrix verify that TDA7463D is sourced from the original manufacturer or authorized distributors?

All TDA7463D 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 TDA7463D meets industry standards.

7.What is the process for return or replacement of TDA7463D?

All TDA7463D units undergo pre-shipment inspection (PSI). If there is an issue with TDA7463D, 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 TDA7463D part is unused and in its original packaging.

Return procedure for TDA7463D:

1.Submit a request within 90 days.

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

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