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

STMicroelectronics TDA7467

Name: TDA7467
Brand: STMicroelectronics
SKU: TDA7467
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7467

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 28-DIP (0.600", 15.24mm)

Datasheet:: TDA7467.pdf

Description:: IC AUDIO SIGNAL PROCESSOR 28DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,427

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Product details

Overview

TDA7467 from STMicroelectronics is a programmable stereo audio matrix IC implementing SRS (Sound Retrieval System) 3D audio processing for mono and stereo sources. It provides 0.5 dB input attenuation control, independent SRS center/space attenuation (1 dB steps), mute function, and mono/stereo SRS mode selection-all via I²C bus. Used in consumer audio systems requiring spatial enhancement without external DSP.

For engineers reviewing the TDA7467 datasheet, TDA7467 pinout, TDA7467 application, or TDA7467 equivalent, key selection criteria include I²C-programmable SRS effect depth, dual-mode (mono/stereo 3D) operation, low THD (0.01% typ.), high channel separation (90 dB), and DIP28/SO28 package compatibility with legacy audio signal chains.

Technical Context

The TDA7467 integrates bipolar/CMOS/DMOS technology to achieve low distortion (0.01% THD), low noise (4 µVrms output noise, OFF), and minimal DC stepping (<3 mV). Its analog signal path uses precision resistor networks and op-amps per SRS Labs specifications, ensuring consistent spatial processing independent of process variation.

Control is fully serial: I²C interface supports start/stop conditions, 8-bit data bytes with ACK, and both incremental and non-incremental addressing modes. Chip address depends on ADDR pin state (0x80 floating, 0x82 pulled to VS), enabling multi-device bus configuration.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	7–10.2 V - Supports standard 9 V audio rails with ±1.2 V tolerance
THD+N	0.01% typ. @ 1 Vrms, 1 kHz - Enables high-fidelity playback without audible coloration
Channel Separation	90 dB @ 1 kHz - Ensures clean left/right signal isolation for accurate stereo imaging
Input Attenuation	−31.5 to 0 dB in 0.5 dB steps - Fine-grained volume leveling before SRS processing
SRS Center/Space Range	−31 to 0 dB in 1 dB steps - Independent adjustment of perceived soundstage width and front-center focus
Mute Attenuation	100 dB - Full analog signal blocking for silent switching between audio sources
Output Noise	4 µVrms (OFF), 50 µVrms (SRS ON) - Low-noise performance critical for line-level amplification stages

Pinout & Package

Available in DIP28 (through-hole) and SO28 (surface-mount) packages. Both share identical pin functions and electrical characteristics.

Pin/Terminal	Circuit Role	Design Meaning
ADDR	I²C Address Select	Configures device address: floating = 0x80, tied to VS = 0x82
SDA / SCL	I²C Data/Clock	Two-wire serial interface for full register programming and status readback
AGND / DIG_GND	Analog/Digital Ground	Separate ground pins minimize digital switching noise coupling into analog paths
HP1–HP6	High-Pass Filter Inputs	Accept external RC networks to set SRS phase shifter frequencies (e.g., HP1 = 125 Hz for Perspective 1)
LP1 / LP2	Low-Pass Filter Outputs	Deliver processed left/right channel signals with SRS-enhanced spatial response
LIN / RIN / LOUT / ROUT	Audio I/O Terminals	Dedicated differential-capable inputs and buffered outputs for direct connection to preamp/power amp stages
VREFOUT / CREF	Reference Voltage Source	Provides stable 3.8 V DC bias for internal op-amp common-mode setting and external network referencing

Key Features

Feature	Design Value
SRS 3D Audio Processing	Licensed SRS Labs algorithm implemented in analog domain for zero-latency spatial enhancement
I²C Programmability	Full control of all functions-including mode, attenuation, mute-via 8-bit register map with auto-increment support
DC Step Suppression	<3 mV step voltage during attenuation changes prevents audible pops/clicks in speaker output
Low-Noise Analog Core	4 µVrms output noise (OFF) enables use in high-gain preamp stages without added noise floor degradation
Bipolar/CMOS/DMOS Process	Combines precision analog matching (bipolar), logic density (CMOS), and robust output drive (DMOS)

Applications

Home Theater AV Receivers

Automotive Infotainment Systems

Use Scenario: Enhancing stereo content from TV or streaming sources into immersive 3D sound using legacy two-channel speaker setups.

IC Role / Device Role / Timing Role: Audio matrix processor applying real-time SRS spatial expansion before power amplification.

Use Value: Delivers perceptible soundstage widening and center image reinforcement without requiring additional speakers or digital decoding hardware.

Use Scenario: Upgrading OEM head unit audio output to provide SRS-enhanced listening experience across vehicle cabin acoustics.

IC Role / Device Role / Timing Role: Analog post-processing stage between DAC and line driver, compensating for cabin-specific frequency response and dispersion limitations.

Use Value: Improves perceived clarity and localization of voice/instrument cues at varying listener positions, validated at 85°C ambient operation.

Portable CD/MP3 Player Docking Stations

Professional Audio Monitor Controllers

Use Scenario: Adding spatial enhancement to compact docking stations with fixed 2.0 speaker configurations and limited DSP resources.

IC Role / Device Role / Timing Role: Standalone analog SRS engine accepting line-level input and delivering enhanced stereo output to integrated amplifiers.

Use Value: Achieves perceptible 3D effect with <100 µVrms added noise and no latency-critical for battery-powered, low-EMI designs.

Use Scenario: Providing selectable SRS mono/stereo processing in studio monitor controllers for A/B comparison of spatial rendering techniques.

IC Role / Device Role / Timing Role: Precision analog matrix with calibrated 0.5 dB attenuation steps and mute for reference-grade signal routing.

Use Value: Enables repeatable, low-THD (0.01%) evaluation of SRS effect depth and center/space balance under controlled listening conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar SRS audio matrix applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7466	Predecessor IC; lacks SRS mono mode and has coarser 1 dB input attenuation steps	Supports only stereo SRS; no mono 3D mode or perspective filter inputs	Select when legacy system compatibility is required and mono SRS functionality is unnecessary
STA326	DSP-based audio processor with integrated SRS; requires firmware loading and external memory	Offers programmable EQ, crossover, and multi-band dynamics beyond SRS matrix functions	Select when system-level flexibility (e.g., custom profiles, multiple effects) outweighs analog simplicity and zero-latency operation

Compared with TDA7466 and STA326, the TDA7467 uniquely balances analog fidelity, I²C configurability, and licensed SRS mono/stereo mode support in a single-chip solution-making it optimal for cost-sensitive, latency-critical consumer audio where SRS licensing and analog transparency are design priorities.

Availability

TDA7467 is available at Aetrix Electronics and suitable for home theater receivers, automotive infotainment systems, portable docking stations, and professional monitor controllers requiring stable component supply and long-term obsolescence management.

Supply support for TDA7467 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 analog, power, microcontrollers, and automotive ICs with vertical manufacturing and broad distribution.

The TDA7467 belongs to ST's legacy audio matrix product line, designed specifically for analog-domain SRS 3D audio enhancement in cost-sensitive consumer and automotive audio systems without requiring external DSP or software development.

FAQ

What is the maximum supply voltage rating for the TDA7467?

The absolute maximum supply voltage is 11 V, but the recommended operating range is 7–10.2 V. Operation above 10.2 V risks exceeding thermal limits and degrading THD performance. The device draws 25 mA typical at 9 V, and thermal resistance (junction-to-pins) is 85 °C/W-requiring adequate PCB copper area for heatsinking in enclosed enclosures.

Does the TDA7467 require external passive components to implement SRS processing?

Yes. SRS functionality depends on external RC networks connected to HP1–HP6 and LP1/LP2 pins. For example, HP1 requires a 0.15 µF capacitor to set the 125 Hz perspective filter; values are specified in the datasheet block diagram and must match SRS Labs' reference design to ensure correct phase shift and spatial effect fidelity.

Can the TDA7467 operate in standalone mode without an I²C controller?

No. All functional modes-including mono/stereo SRS selection, attenuation levels, and mute-are controlled exclusively via I²C commands. There are no hardware strapping pins or default analog configurations. Power-on reset initializes registers to fixed defaults (e.g., SRS OFF), but active control requires continuous microcontroller communication.

Is the TDA7467 still in active production or considered obsolete?

STMicroelectronics lists the TDA7467 as "Obsolete Product(s)" in its official documentation. However, Aetrix Electronics maintains verified legacy stock with full traceability and offers extended lifecycle support-including counterfeit mitigation, solderability validation, and technical documentation archiving-for continued use in maintenance and replacement programs.

TDA7467 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SRS

Package/Case:: 28-DIP (0.600", 15.24mm)

Packaging:: Tube

Product Status:: Obsolete

Function:: Audio Signal Processor

Applications:: Signal Mixing

Number of Channels:: 2

Interface:: I2C

Voltage - Supply:: 7V ~ 10.2V

Operating Temperature:: -10°C ~ 85°C (TA)

Specifications:: Audio Matrix

Mounting Type:: Through Hole

Grade:: -

TDA7467 FAQ

1.How can I place an order for TDA7467 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7467 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 TDA7467 reliable?

The price and inventory of TDA7467 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7467 is usually 5 days.

3.What payment methods are accepted for TDA7467?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7467 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7467?

TDA7467 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7467 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 TDA7467?

For technical support, including TDA7467 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7467 requirements.

6.How does Aetrix verify that TDA7467 is sourced from the original manufacturer or authorized distributors?

All TDA7467 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 TDA7467 meets industry standards.

7.What is the process for return or replacement of TDA7467?

All TDA7467 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7467, 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 TDA7467 part is unused and in its original packaging.

Return procedure for TDA7467:

1.Submit a request within 90 days.

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

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