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

STMicroelectronics TDA7465

Name: TDA7465
Brand: STMicroelectronics
SKU: TDA7465
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7465

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 42-SDIP (0.600", 15.24mm)

Datasheet:: TDA7465.pdf

Description:: IC AUDIO TONE PROCESSOR 42SDIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TDA7465 from STMicroelectronics is a digitally controlled audio processor IC with integrated SRS Surround Sound, voice canceller, and 3-band tone control (bass/middle/treble), designed for automotive radio, Hi-Fi, and TV audio systems. It features stereo input, mixer input for karaoke, independent speaker/recording attenuators (0.5–1 dB steps), zero-crossing mute, and I²C programmability. Key specs include THD ≤0.1%, S/N ratio 106 dB, and supply voltage 7–10.2 V.

For engineers reviewing the TDA7465 datasheet, TDA7465 pinout, TDA7465 application, or TDA7465 equivalent, this device supports real-time surround mode selection (Music/Movie/Simulated), SRS center/space adjustment, rear speaker output drive, and precise analog signal conditioning via resistor-programmable filters - critical for automotive infotainment tuning and multi-source audio mixing.

Technical Context

The TDA7465 implements a bipolar/CMOS hybrid architecture to achieve low distortion (0.01% typ.), low noise (4 µVrms output noise in OFF mode), and DC step-free attenuation. Its analog signal path integrates programmable phase shifters (four stages with selectable resistors) and matrix-based surround synthesis per SRS Labs licensing.

Control is fully serial via I²C bus (SDA/SCL), supporting incremental and non-incremental addressing, subaddress mapping for function blocks (e.g., BASS, TREBLE, SURROUND MODE), and hardware address pin (ADDR) for dual-device configuration. Power-on reset initializes all functions to safe defaults including mute, max attenuation, and SRS off.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	7–10.2 V - Enables direct connection to automotive 9 V rail with ±1.2 V tolerance margin.
Total Harmonic Distortion	0.01–0.1% @ 1 kHz - Ensures high-fidelity audio reproduction without audible coloration.
Signal-to-Noise Ratio	106 dB - Delivers ultra-low background noise for quiet listening environments (e.g., car cabin at idle).
Input Attenuation Range	−31.5 to 0 dB in 0.5 dB steps - Allows fine-grained gain matching between sources (e.g., tuner vs. Bluetooth module).
SRS Surround Control	Center: −31 to 0 dB; Space: −31 to 0 dB in 1 dB steps - Enables precise spatial imaging calibration for speaker layout compensation.
Speaker Output Attenuation	0 to −79 dB in 1 dB steps - Supports balanced left/right channel leveling and dynamic range compression for loudspeaker protection.
I²C Interface	Standard-mode (100 kHz), 7-bit address + R/W bit - Compatible with common microcontrollers without timing overhead or level-shifting.

Pinout & Package

Package: SDIP42 (42-pin shrink dual in-line package, 0.600" width, 36.83 mm × 16.00 mm footprint).

Pin/Terminal	Circuit Role	Design Meaning
L-IN / R-IN	Stereo analog input	Differential-capable inputs accepting up to 2 Vrms; internal 50 kΩ impedance enables direct connection to line-level sources.
MIX	Karaoke microphone input	High-impedance (100 kΩ) input with dedicated voice canceller path; supports mono mic mixing into stereo bus.
L-OUT / R-OUT	Main speaker outputs	Buffered outputs with 30 Ω typical impedance; drive 10 kΩ loads directly; support zero-crossing mute to eliminate pop noise.
REAR_OUT	Surround speaker output	Active rear channel derived from SRS matrix; provides discrete surround feed for 4.1 or 5.1 system expansion.
SDA / SCL	I²C bidirectional bus	Open-drain pins requiring external pull-ups; enable full digital control of all audio parameters without additional GPIOs.
ADDR	Hardware address select	Connect to VS or GND to set I²C address (0x80 or 0x82), allowing two TDA7465s on same bus for dual-zone audio.
VREFOUT	Reference voltage output	Stable 3.8 V reference for external filter networks (e.g., treble/middle/bass RC stages); improves tone control accuracy across temperature.

Key Features

Feature	Design Value
SRS Surround Sound Engine	License-certified implementation with selectable modes (Music/Movie/Simulated) and independent Center/Space controls for psychoacoustic spatial enhancement.
Voice Canceller	Three-output architecture (AVO1–AVO3) enabling adaptive echo suppression for karaoke applications using microphone + line inputs.
Zero-Crossing Attenuation	Hardware-synchronized volume changes eliminate transient clicks during fade or mute transitions - essential for broadcast audio switching.
Independent Record Outputs	Dual RECOUT_L/RECOUT_R with 1 dB-step attenuators and mux selection allow simultaneous recording of processed/unprocessed streams.
Programmable Phase Shift Network	Four digitally selectable phase shifter stages (RPS1–RPS4) with 16 resistance combinations per stage - enables precise surround matrix tuning per acoustic environment.

Applications

Automotive Infotainment System

Home Theater Audio Processor

Use Scenario: Integrated head unit combining AM/FM tuner, USB playback, and Bluetooth streaming with surround sound enhancement.

IC Role / Device Role / Timing Role: Central audio processor handling input mixing, tone correction, SRS surround generation, and speaker-level attenuation.

Use Value: Enables OEM-grade spatial audio using factory-tuned SRS profiles while maintaining compatibility with legacy speaker wiring (no external DSP required).

Use Scenario: Compact AV receiver supporting stereo-to-surround upmixing for small living rooms without external amplifiers.

IC Role / Device Role / Timing Role: Analog front-end processor generating rear channel signals and applying bass management before power amplification.

Use Value: Delivers theater-like immersion via simulated surround modes with 256 response options, reducing need for multi-channel DACs or complex FPGA logic.

Karaoke Mixer Module

Professional Broadcast Monitor

Use Scenario: Portable karaoke device with dual mic inputs, real-time voice cancellation, and vocal reverb integration.

IC Role / Device Role / Timing Role: Voice canceller core with MIX input path and independent RECOUT routing for vocal isolation and backing track extraction.

Use Value: Achieves >6 dB voice cancellation depth (AVO1 = +6 dB typ.) without latency-sensitive digital processing - ideal for live vocal performance.

Use Scenario: Studio monitor controller with precise tone shaping, channel balance, and source switching for audio post-production.

IC Role / Device Role / Timing Role: High-S/N analog signal conditioner providing calibrated 3-band EQ, L/R balance, and mute/attenuation for critical listening.

Use Value: Maintains 106 dB S/N and <0.01% THD across full attenuation range - meets EBU R68 monitoring standards for reference-grade fidelity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7492	Class-D amplifier + audio processor combo; lacks SRS license and voice canceller; higher output power (2×30 W).	Targeted at active speaker designs requiring built-in amplification; not suitable for line-level signal chain processing.	Select when system requires integrated power stage and can omit licensed SRS processing.
CS42L52	Low-power stereo codec with I²C control; includes ADC/DAC but no analog tone control, SRS, or surround matrix.	Designed for portable battery-powered devices; no rear output or karaoke mixer functionality.	Select for mobile audio where digitization and power efficiency outweigh analog feature richness.

Compared with TDA7465, TDA7492 trades audio processing depth for integrated Class-D output drive, while CS42L52 replaces analog signal conditioning with mixed-signal conversion - making TDA7465 uniquely suited for high-SNR, license-compliant analog surround systems in fixed-location audio equipment.

Availability

TDA7465 is available at Aetrix Electronics and suitable for automotive infotainment, home theater receivers, karaoke mixers, and professional broadcast monitors requiring stable component supply and long-lifecycle support.

Supply support for TDA7465 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, and microcontroller solutions for automotive, industrial, and consumer markets.

The TDA7465 belongs to ST's audio processor product line, engineered specifically for high-fidelity analog signal conditioning and licensed surround sound synthesis in cost-sensitive, high-reliability audio subsystems.

FAQ

What is the function of the ADDR pin on the TDA7465?

The ADDR pin sets the LSB of the I²C slave address: tied to VS selects 0x82, tied to GND selects 0x80. This allows two TDA7465 devices to share the same I²C bus for dual-zone audio processing (e.g., front/rear cabin control) without address conflict or software arbitration.

Does the TDA7465 require external passive components for tone control?

Yes - bass, middle, and treble filtering relies on external resistor-capacitor networks connected to pins like BASS-LI/BASS-LO, MIDDLE-LI/MIDDLE-LO, and TREBLE-L/TREBLE-R. Component values (e.g., 2.7 kΩ, 18 nF) are specified in the datasheet to meet SRS Labs' frequency response targets and must be populated per application requirements.

How does the voice canceller operate without a digital signal path?

The voice canceller uses analog subtraction: the MIX input (microphone) is inverted and summed with delayed versions of L-IN/R-IN to suppress correlated vocal content. Its three outputs (AVO1–AVO3) provide different cancellation depths and phase alignments, all implemented in the analog domain using operational amplifiers and precision resistors - eliminating algorithmic latency.

Is the TDA7465 still in active production?

No - STMicroelectronics has marked the TDA7465 as obsolete (as noted on page 1/20 of the datasheet). However, Aetrix Electronics maintains legacy inventory with full traceability and offers lifecycle management support, including cross-reference guidance and last-time-buy planning for ongoing production programs.

TDA7465 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 42-SDIP (0.600", 15.24mm)

Packaging:: Tube

Product Status:: Obsolete

Function:: Audio Tone 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:: -

TDA7465 FAQ

1.How can I place an order for TDA7465 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7465 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 TDA7465 reliable?

The price and inventory of TDA7465 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7465 is usually 5 days.

3.What payment methods are accepted for TDA7465?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7465 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7465?

TDA7465 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7465 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 TDA7465?

For technical support, including TDA7465 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7465 requirements.

6.How does Aetrix verify that TDA7465 is sourced from the original manufacturer or authorized distributors?

All TDA7465 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 TDA7465 meets industry standards.

7.What is the process for return or replacement of TDA7465?

All TDA7465 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7465, 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 TDA7465 part is unused and in its original packaging.

Return procedure for TDA7465:

1.Submit a request within 90 days.

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

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