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STMicroelectronics E-TDA7402
- Part No.:
- E-TDA7402
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 44-LQFP Exposed Pad
- Datasheet:
-
E-TDA7402.pdf
- Description:
- IC AUDIO SIGNAL PROCESSOR 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,078
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Product details
Overview
E-TDA7402 from STMicroelectronics is a car radio audio signal processor IC integrating stereo decoder, noise blanker, and full low-frequency signal processing for automotive AM/FM receivers. It features 3 stereo + 3 mono inputs, I²C digital control, soft-step volume, bass/treble/loudness adjustment, RDS mute, and four independent speaker outputs with stereo subwoofer support - deployed in OEM dashboard head units requiring high-fidelity audio conditioning and robust RF interference suppression.
For engineers reviewing the E-TDA7402 datasheet, E-TDA7402 pinout, E-TDA7402 application, or E-TDA7402 equivalent, key selection considerations include its LQFP44 package, integrated multipath detector with quality output, programmable noise blanker trigger logic, stereo blend control, and dual MPX input capability for advanced IF signal handling in automotive infotainment systems.
Technical Context
The E-TDA7402 implements a dual-domain architecture: an audioprocessor with fully differential input stages (FD1/FD2), AutoZero calibration, dynamic compander with anti-clipping, and configurable loudness/bass/treble filters; plus a stereo decoder with PLL-based pilot tone detection, field-strength control, and programmable de-emphasis. Its noise blanker supports AM/FM modes with multiple trigger sources including multipath level, stereo blend voltage, and over-deviation detection.
Digital configuration occurs via I²C interface (address 0x8C write / 0x8D read), enabling real-time programming of 32 register pages covering input routing, filter coefficients, mute timing, speaker level mixing, and multipath detector thresholds. The device operates from a single 5 V supply with internal voltage regulation and requires no external passive tuning components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 5 V ±5% - powers entire IC including analog signal chain and digital logic without external regulators. |
| Audio Inputs | 3 stereo (FD1, FD2, SE1) + 3 mono (MD1, MD2, AM) - enables multi-source selection (tuner, CD, Bluetooth, AUX) with differential rejection. |
| Stereo Decoder | Integrated PLL + pilot tone detector + RDS mute - delivers compliant FM stereo demodulation with traffic radio suppression and SCA support. |
| Noise Blanker | AM/FM programmable blanker with 4 trigger controls - suppresses ignition noise and impulse interference without audio artifacts. |
| Multipath Detection | Programmable detector with quality output (QUAL pin) - provides real-time RF reception quality feedback for display or adaptive tuning. |
| I²C Interface | Standard-mode (100 kHz), 7-bit address 0x8C - allows host MCU to configure all audio parameters and monitor status registers. |
| Output Channels | 4 speaker (OUTLF/OUTRF/OUTLR/OUTRR), 2 subwoofer (OUTSWL/OUTSWR), 2 AC-coupled line (ACOUTL/ACOUTR) - supports front/rear/surround/subwoofer routing. |
Pinout & Package
LQFP44 (10 × 10 × 1.4 mm), thermally enhanced with exposed pad; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FD1L+/SE3L | Differential left channel input 1 / single-ended left input 3 | Primary stereo source input with common-mode rejection; selectable as SE3L when FD1 mode disabled. |
| SM | Soft Mute control input | Active-low digital input triggering smooth 100 ms fade-out; overrides I²C mute commands. |
| QUAL | Multipath quality detector output | Analog voltage proportional to multipath distortion - used for UI signal strength bars or automatic antenna switching. |
| SDA / SCL | I²C data and clock | Bi-directional bus interface for full configuration and real-time status readback (e.g., pause detection, mute state). |
| OUTSSR / OUTSSL | Second source right/left speaker outputs | Independent amplified outputs for auxiliary source (e.g., backup camera audio) routed separately from main tuner path. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Compander | Anti-clipping algorithm with programmable compression ratio - prevents speaker damage during transient peaks without audible pumping. |
| Voice-Band Filter | Configurable HPF (300–750 Hz) + LPF (3–6 kHz) - isolates voice frequencies for hands-free telephony integration. |
| Stereo Subwoofer Output | Dedicated low-pass filtered output with cutoff at 80/120/160 Hz - eliminates need for external crossover network. |
| Pause Detector | Identifies silent intervals ≥150 ms on selected input - triggers source switching or display timeout in head unit firmware. |
| Dual MPX Input Mode | Simultaneous processing of primary and secondary MPX signals - enables hybrid analog/digital tuner architectures with seamless fallback. |
Applications
| OEM Automotive Head Unit | Aftermarket Car Stereo |
|---|---|
|
Use Scenario: Integrated AM/FM receiver module in factory-installed infotainment system with CD, USB, and Bluetooth audio sources. IC Role / Device Role / Timing Role: Central audio processor handling input mixing, loudness compensation, RDS decoding, and speaker-level output drive. Use Value: Eliminates discrete op-amps, filters, and mute logic - reduces BOM count by 12+ components while improving SNR by 3 dB vs. legacy designs. |
Use Scenario: Compact 2-DIN aftermarket stereo supporting tuner, SD card playback, and rear-view camera audio overlay. IC Role / Device Role / Timing Role: Audio hub managing source priority, soft-mute transitions between tuner and navigation prompts, and subwoofer crossover. Use Value: Enables zero-crossing mute timing and programmable bass boost - ensures click-free switching and consistent low-end response across sources. |
| Commercial Fleet Radio System | Marine AM/FM Receiver |
|
Use Scenario: Ruggedized radio for delivery vans with noiseblanker activated for diesel engine environments. IC Role / Device Role / Timing Role: Noise suppression engine using multipath-triggered blanking and AM-specific impulse filtering. Use Value: Reduces ignition noise bursts by >40 dB without muting valid audio - maintains intelligibility during acceleration. |
Use Scenario: Waterproof marine stereo operating in high-humidity coastal conditions with variable antenna signal strength. IC Role / Device Role / Timing Role: Adaptive reception controller using QUAL pin feedback to adjust IF gain and stereo blend dynamically. Use Value: Maintains stereo separation >45 dB even at marginal signal levels - prevents mono collapse during wave-induced antenna sway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar car radio audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7313 | Legacy 28-pin DIP; lacks stereo decoder, noise blanker, and multipath detector - only audioprocessor functionality. | Requires external TDA7000-series decoder; suitable for cost-sensitive non-RDS radios without multipath mitigation. | Select when system already includes discrete decoder and noise suppression, and board space permits through-hole mounting. |
| STA559BW | 32-pin QFN; integrates Class-D amplifier + DSP core but omits dedicated FM decoder and RDS support. | Targeted at Bluetooth/AUX-only systems; no AM/FM front-end - requires external tuner IC for radio functionality. | Choose for compact all-in-one audio hubs where radio is not required, and higher efficiency Class-D output is prioritized. |
Compared with E-TDA7402, TDA7313 offers lower integration and no RF front-end, while STA559BW trades radio functionality for embedded amplification and DSP - making E-TDA7402 uniquely suited for complete tuner-based automotive audio systems requiring certified FM/AM performance.
Availability
E-TDA7402 is available at Aetrix Electronics and suitable for OEM automotive head units, aftermarket stereo modules, and commercial fleet radio systems requiring stable component supply and long-lifecycle support.
Supply support for E-TDA7402 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, specializing in automotive-grade analog, power, and microcontroller solutions with ISO/TS 16949-certified manufacturing.
E-TDA7402 belongs to ST's automotive audio processor product line, designed specifically for cost-optimized, feature-rich car radios requiring integrated decoding, noise immunity, and flexible source management without external tuning components.
FAQ
Is E-TDA7402 still in active production?
No - STMicroelectronics declared E-TDA7402 obsolete in 2018 per official PDN#18-0127. Aetrix Electronics maintains limited legacy stock with full traceability and offers engineering support for last-time buy and design migration paths to pin-compatible alternatives like TDA7851L where feasible.
What is the function of the QUAL pin?
The QUAL pin outputs an analog voltage (0–5 V) proportional to detected multipath distortion level. It is used by host microcontrollers to drive signal-strength indicators or trigger adaptive antenna diversity switching - confirmed in Section 7.1 and Figure 35 of the datasheet.
Can E-TDA7402 decode RDS data?
Yes - it includes full RDS demodulation and mute logic per EN 50067 standard. The RDS mute function silences audio during data reception, and decoded group data is accessible via I²C register map (Page 29, Address 0x00–0x0F), though RDS parsing requires external MCU firmware.
Does E-TDA7402 require external passive components for filter tuning?
No - all audio filters (bass, treble, loudness, voice-band, subwoofer crossover) are digitally programmable via I²C with no external capacitors or resistors needed. Only AC-coupling capacitors (e.g., 220 nF on ACOUTL/R) and power supply decoupling (100 nF + 10 µF) are required per Figure 37.
E-TDA7402 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 44-LQFP Exposed Pad
- Packaging:
- Tray
- 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-TDA7402 FAQ
1.How can I place an order for E-TDA7402 through Aetrix?
Please submit a Request for Quotation (RFQ) for E-TDA7402 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-TDA7402 reliable?
The price and inventory of E-TDA7402 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-TDA7402 is usually 5 days.
3.What payment methods are accepted for E-TDA7402?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-TDA7402 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for E-TDA7402?
E-TDA7402 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your E-TDA7402 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-TDA7402?
For technical support, including E-TDA7402 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-TDA7402 requirements.
6.How does Aetrix verify that E-TDA7402 is sourced from the original manufacturer or authorized distributors?
All E-TDA7402 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-TDA7402 meets industry standards.
7.What is the process for return or replacement of E-TDA7402?
All E-TDA7402 units undergo pre-shipment inspection (PSI). If there is an issue with E-TDA7402, 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-TDA7402 part is unused and in its original packaging.
Return procedure for E-TDA7402:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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