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STMicroelectronics E-TDA7402TR
- Part No.:
- E-TDA7402TR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 44-LQFP Exposed Pad
- Datasheet:
-
E-TDA7402TR.pdf
- Description:
- IC AUDIO SIGNAL PROCESSOR 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,481
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Product details
Overview
E-TDA7402TR from STMicroelectronics is a car radio signal processor IC integrating a high-performance audioprocessor and stereo decoder-noise blanker. It supports 3 stereo + 3 mono analog inputs, provides soft-step volume control, bass/treble/loudness adjustment, RDS mute, AM/FM noise blanking, and programmable multipath detection. Used in automotive infotainment head units for full low-frequency signal conditioning and IF-stage decoding.
For engineers reviewing the E-TDA7402TR datasheet, E-TDA7402TR pinout, E-TDA7402TR application, or E-TDA7402TR equivalent, this page delivers verified functional roles, I²C-programmable filter parameters (e.g., bass center frequency = 80 Hz, treble = 17.5 kHz), stereo subwoofer output capability, and real-world automotive audio system integration details.
Technical Context
The device implements a dual-path architecture: one dedicated to audioprocessing (input mixing, dynamic compression, loudness, voice-band filtering, soft mute/step) and another to stereo decoding (pilot tone detection, PLL demodulation, de-emphasis, field strength control). Both subsystems are independently configurable via I²C.
Its noise blanker features multiple trigger controls-including FM deviation, stereo blend voltage, and multipath level-with NCT (noise-controlled threshold) and automatic threshold adaptation. The multipath detector outputs a quality signal usable for display or adaptive audio processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 5 V ±10% - powers all analog and digital blocks; requires stable automotive-grade LDO regulation |
| Bass Center Frequency | 80 Hz (adjustable) - enables precise low-end shaping for cabin acoustic compensation |
| Treble Center Frequency | 17.5 kHz - targets high-frequency clarity without harshness in vehicle cabin environments |
| Loudness Compensation | Peak at 400 Hz with 15 dB attenuation - applies psychoacoustic correction for low-volume listening |
| Soft Mute Attack Time | 100 ms - prevents audible click during station switching or signal loss recovery |
| I²C Interface Speed | Standard mode (100 kbit/s) - supports host MCU configuration without timing-critical firmware overhead |
| Subwoofer Output | Dedicated stereo LPF/HPF-configurable path - enables external active subwoofer integration without DSP |
Pinout & Package
LQFP44 (10 × 10 × 1.4 mm), thermally enhanced with exposed pad; RoHS-compliant, automotive-qualified package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SE1L / SE1R | Single-ended stereo input left/right | Accepts line-level audio from CD or auxiliary source; referenced to internal bias |
| FD1L+/FD1L− / FD1R+/FD1R− | Full-differential stereo input pair | Rejects common-mode noise from tuner IF stages; supports DC-coupled connection |
| AM / MPX / IF | AM detector / FM MPX / IF input | Direct interface to tuner IF output; enables integrated stereo decoding without external demodulator |
| ACOUTL / ACOUTR | Analog audio output left/right | Main speaker outputs with programmable attenuation and mixing; drive 2 kΩ load |
| SWINL / SWINR | Subwoofer input left/right | Post-processing path for low-frequency extraction; feeds internal 80/120/160 Hz LPF |
| SDA / SCL | I²C serial data/clock | Configures all audio filters, mute behavior, noise blanker thresholds, and decoder settings |
| QUAL / SM | Quality detector output / Soft Mute control | QUAL provides analog multipath severity signal; SM enables hardware-triggered mute independent of I²C |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic compression stage | Anti-clipping compander for CD input - prevents distortion during transient peaks without manual gain staging |
| Four independent speaker outputs | OUTLF/OUTRF/OUTLR/OUTRR - enables front/rear speaker separation with individual level control |
| Voice-band filter | Programmable HPF (300–750 Hz) + LPF (3–6 kHz) - optimizes speech intelligibility in hands-free calling |
| RDS mute support | Hardware-synchronized muting during RDS data burst - eliminates interference on audio path during metadata reception |
| No external adjustments | All trims digitally controlled - eliminates potentiometers, reduces BOM count and calibration labor |
Applications
| Automotive AM/FM Radio Head Unit | CD-Based Infotainment System |
|---|---|
Use Scenario: Integrated analog radio receiver with tuner IF interface and multi-source audio routing. IC Role / Device Role / Timing Role: Central audio signal processor handling IF demodulation, stereo decoding, noise suppression, and loudness compensation. Use Value: Eliminates need for discrete op-amps, filters, and mute logic; reduces PCB area by >35% vs. discrete solution. |
Use Scenario: CD player with dynamic range management and cabin-acoustic tailoring. IC Role / Device Role / Timing Role: Audio front-end with anti-clipping compander, soft-step volume, and bass/treble tuning calibrated for vehicle acoustics. Use Value: Maintains consistent perceived loudness across track transitions and compensates for low-SPL listening conditions. |
| Hands-Free Calling Interface | Aftermarket Subwoofer Integration |
Use Scenario: In-cabin microphone pre-processing and voice enhancement for Bluetooth telephony. IC Role / Device Role / Timing Role: Voice-band filter and pause detector enable clean voice pickup and automatic mute during speech pauses. Use Value: Improves call SNR by >12 dB in noisy driving conditions without requiring external DSP. |
Use Scenario: Adding active subwoofer support to legacy head units lacking low-frequency output. IC Role / Device Role / Timing Role: Stereo subwoofer output with programmable crossover (80/120/160 Hz LPF + 90/135/180 Hz HPF). Use Value: Enables plug-and-play subwoofer extension using only passive RC networks and power amplifier. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar car radio signal processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7413TR | Successor with enhanced noise blanker, wider I²C address range, and improved thermal performance | Same pinout but higher supply rejection; requires updated firmware for new register map | Preferred for new designs where lifecycle assurance and extended temperature range (−40°C to +105°C) are required |
| STA559BW | Digital audio processor with embedded DSP core; lacks integrated stereo decoder and noise blanker | Requires external tuner and ADC; supports advanced algorithms (EQ, DRC, virtual surround) | Chosen when system-level flexibility outweighs integration benefits - e.g., premium OEM platforms with custom audio tuning |
Compared with TDA7413TR, E-TDA7402TR offers proven automotive qualification and simpler register mapping but lacks newer noise immunity enhancements; versus STA559BW, it delivers full analog signal chain integration at lower BOM cost and firmware complexity.
Availability
E-TDA7402TR is available at Aetrix Electronics and suitable for automotive infotainment systems, aftermarket radio upgrades, and hands-free communication modules requiring stable component supply and long-term obsolescence management.
Supply support for E-TDA7402TR 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 automotive, industrial, and power management ICs, with over 30 years of automotive AEC-Q100 qualified product experience.
E-TDA7402TR belongs to ST's TDA audio processor family, designed specifically for cost-sensitive, high-reliability car radio applications requiring integrated analog signal conditioning and FM/AM decoding without external components.
FAQ
Is E-TDA7402TR still in production?
No - E-TDA7402TR is marked obsolete by STMicroelectronics (as confirmed in Rev 6 datasheet, September 2008). However, Aetrix Electronics maintains legacy inventory with full traceability and offers engineering support for redesign guidance to TDA7413TR or compatible alternatives.
What is the function of the QUAL pin?
The QUAL pin outputs an analog voltage proportional to multipath interference severity, derived from the internal multipath detector. It can drive LED indicators or feed MCU ADCs for adaptive audio blending or display-based signal quality feedback in automotive UIs.
Can E-TDA7402TR decode RDS data?
No - E-TDA7402TR supports RDS mute (silencing audio during RDS data bursts) but does not include an RDS data decoder. External microcontroller or dedicated RDS IC (e.g., TDA7579) is required for parsing PI codes, PS names, or traffic announcements.
Does it require external clocking for stereo decoding?
No - the stereo decoder includes an integrated PLL with pilot tone detector and requires no external crystal or clock source. The 19 kHz pilot tone from the tuner's MPX output serves as the reference for synchronous demodulation.
E-TDA7402TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 44-LQFP Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Audio Signal Processor
- Applications:
- Audio
- Number of Channels:
- 2
- Interface:
- I2C
- Voltage - Supply:
- 7.5V ~ 10V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Specifications:
- -
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
E-TDA7402TR FAQ
1.How can I place an order for E-TDA7402TR through Aetrix?
Please submit a Request for Quotation (RFQ) for E-TDA7402TR 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 E-TDA7402TR reliable?
The price and inventory of E-TDA7402TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-TDA7402TR is usually 5 days.
3.What payment methods are accepted for E-TDA7402TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-TDA7402TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for E-TDA7402TR?
E-TDA7402TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your E-TDA7402TR 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 E-TDA7402TR?
For technical support, including E-TDA7402TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-TDA7402TR requirements.
6.How does Aetrix verify that E-TDA7402TR is sourced from the original manufacturer or authorized distributors?
All E-TDA7402TR 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 E-TDA7402TR meets industry standards.
7.What is the process for return or replacement of E-TDA7402TR?
All E-TDA7402TR units undergo pre-shipment inspection (PSI). If there is an issue with E-TDA7402TR, 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 E-TDA7402TR part is unused and in its original packaging.
Return procedure for E-TDA7402TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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