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STMicroelectronics TDA7406TR
- Part No.:
- TDA7406TR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 44-LQFP
- Datasheet:
-
TDA7406TR.pdf
- Description:
- IC AUDIO SIGNAL PROCESSOR 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,940
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Product details
Overview
TDA7406TR from STMicroelectronics is a fully integrated car radio signal processor IC combining a 7-band audio equalizer, 7-band spectrum analyzer, stereo decoder, AM/FM noiseblanker, and multipath detector in a single TQFP44 package. It delivers programmable volume control (110 dB range), soft-step speaker attenuation, subwoofer high-pass filtering (90/135/180 Hz), RDS mute, and I²C-controlled digital configuration for automotive infotainment systems.
For engineers reviewing the TDA7406TR datasheet, TDA7406TR pinout, TDA7406TR application, or TDA7406TR equivalent, this device serves as a complete front-end audio processor for OEM car radios requiring simultaneous multi-source mixing (CDC, MD, TAPE, FM/AM, PHONE, NAVI), real-time spectral analysis, and adaptive noise suppression under varying IF conditions.
Technical Context
The TDA7406TR integrates three functionally distinct subsystems: an audioprocessor with switch-capacitor 2nd-order filters for equalization and spectrum analysis, a stereo decoder with PLL-based pilot tone detection and stereoblend control, and a dual-mode (AM/FM) noiseblanker with programmable trigger paths including multipath-level and over-deviation detection. All subsystems share a unified I²C interface for synchronized parameter loading.
Its analog signal chain features pseudo-differential stereo inputs (PD±), four single-ended stereo inputs, four mono inputs, and dedicated FM-MPX input handling - all routed through a programmable mixing selector before loudness, volume, and equalizer stages. The output stage provides four independent speaker channels plus dedicated subwoofer output with soft-step fader control and direct/soft mute capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 7.5–10 V - supports standard automotive battery range with 60 dB ripple rejection at 1 kHz |
| Supply Current | 42–78 mA @ 9 V - enables low-power operation in always-on vehicle audio systems |
| Equalizer Bands | 7-band, ±15 dB gain range in 1 dB steps - allows precise tonal shaping across 62 Hz to 16 kHz |
| Spectrum Analyzer | 7-band 2nd-order switch-capacitor filters with analog output - provides real-time visual feedback for UI integration |
| Volume Control Range | +32 dB to −79 dB (110 dB total) in 0.5 dB steps - ensures fine-grained acoustic level management |
| Speaker Output Channels | 4 independent outputs with 95 dB attenuation range and soft-step timing - enables fade/mute transitions without audible clicks |
| Subwoofer High-Pass | Programmable cut-off at 90/135/180 Hz - prevents low-frequency distortion in satellite speakers |
Pinout & Package
TQFP44 (7 × 7 mm, 0.8 mm pitch) with exposed thermal pad - optimized for automotive PCB thermal management and EMI resilience.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS | Power Supply Input | Primary 7.5–10 V supply rail for all analog and digital blocks |
| GND | Ground Reference | Analog/digital common ground with dedicated pins for noise isolation |
| SDA / SCL | I²C Interface | Two-wire serial bus for full register configuration of audio, decoder, and noiseblanker parameters |
| ACINL / ACINR | Analog Left/Right Inputs | Single-ended stereo inputs supporting up to 4 stereo sources via internal multiplexer |
| SWACOUT | Subwoofer Output | Monaural, single-ended output with independent gain/mute control and high-pass filter |
| OUT LF / OUT RF / OUT LR / OUT RR | Speaker Outputs | Four differential-capable outputs with soft-step fader, mute, and 95 dB attenuation range |
| PAUSE | Pause Detection Input | Digital input detecting tape/CD pause signals for automatic audio muting |
| QUAL | Quality Detector Output | Analog voltage proportional to received signal quality - used for display or auto-tuning logic |
Key Features
| Feature | Design Value |
|---|---|
| 7-Band Equalizer + Spectrum Analyzer | Shared 2nd-order switch-capacitor filter architecture enables real-time EQ adjustment and on-screen spectral visualization using same filter coefficients |
| Programmable Subwoofer High-Pass | Three selectable cut-off frequencies (90/135/180 Hz) prevent bass overload in satellite speakers while preserving subwoofer extension |
| Soft-Step Speaker Control | Configurable blend time eliminates audible pop/click during volume or source transitions across all 4 speaker channels |
| AM/FM Noiseblanker with Dual Trigger Paths | Simultaneous multipath-level and over-deviation detection enables robust impulse noise suppression in urban driving environments |
| RDS Mute & Stereo Blend Control | Integrated RDS mute logic and analog stereoblend voltage output support seamless mono/stereo switching and traffic announcement prioritization |
Applications
| Automotive Infotainment Head Unit | Aftermarket Car Stereo Receiver |
|---|---|
|
Use Scenario: OEM head unit integrating FM/AM tuner, CD changer, Bluetooth audio, and navigation voice prompts. IC Role / Device Role / Timing Role: Central audio signal processor managing input routing, loudness compensation, 7-band EQ, and RDS-triggered muting during traffic announcements. Use Value: Eliminates need for external DSP or discrete decoder ICs, reducing BOM count and PCB area while enabling consistent audio quality across mixed sources. |
Use Scenario: Compact aftermarket stereo supporting CDC, MD, USB audio, and analog aux inputs. IC Role / Device Role / Timing Role: Audio front-end providing soft-step volume control, subwoofer crossover, and spectrum analyzer output for LED bar-graph displays. Use Value: Enables feature parity with OEM systems (e.g., real-time EQ, pause detection, beep alerts) without custom firmware development. |
| Multi-Source Automotive Audio Hub | FM/AM Radio Module for Telematics |
|
Use Scenario: Vehicle telematics gateway aggregating audio from cellular modem, rear-seat entertainment, and hands-free calling. IC Role / Device Role / Timing Role: Mixing engine with 4 stereo + 4 mono inputs, programmable gain staging, and independent mute per channel for priority-based audio arbitration. Use Value: Supports concurrent audio streams (e.g., navigation guidance over music) with zero-latency muting and cross-fading. |
Use Scenario: Standalone FM/AM radio module embedded in fleet management or emergency response terminals. IC Role / Device Role / Timing Role: Self-contained stereo decoder with noiseblanker, multipath detector, and field-strength monitoring for reliable reception in moving vehicles. Use Value: Delivers stable audio under weak-signal or high-interference conditions via adaptive blanking thresholds and quality-proportional output (QUAL pin). |
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 IC with enhanced I²C address flexibility, improved SNR (95 dB vs. 90 dB), and extended temperature range (−40°C to +105°C) | Supports higher ambient under-hood deployments and tighter audio fidelity requirements in premium audio systems | Select when upgrading legacy designs requiring extended thermal margin and lower THD+N |
| STA559BW | Digital audio processor with integrated Class-D amplifier (2×30 W), no built-in stereo decoder or noiseblanker | Targets amplified audio solutions where external tuner modules provide decoded baseband signals | Select when system architecture separates RF tuning from audio processing and requires on-chip power amplification |
Compared with TDA7406TR, TDA7413TR offers higher precision and thermal robustness for next-gen platforms, while STA559BW shifts functionality toward amplified digital audio playback - neither replicates the TDA7406TR's integrated analog tuner front-end and noise mitigation capabilities.
Availability
TDA7406TR is available at Aetrix Electronics and suitable for automotive infotainment head units, aftermarket car stereo receivers, and FM/AM radio modules requiring stable component supply throughout extended production lifecycles.
Supply support for TDA7406TR 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 automotive-grade analog, power, and microcontroller solutions with ISO/TS 16949-certified manufacturing.
The TDA7406TR belongs to ST's automotive audio processor product line, designed specifically to consolidate analog signal conditioning, stereo decoding, and noise suppression functions into a single chip for cost-sensitive, space-constrained car radio platforms.
FAQ
Is the TDA7406TR still in active production?
No - the TDA7406TR is marked as Obsolete by STMicroelectronics per its official documentation. However, Aetrix Electronics maintains legacy inventory with full traceability and supports long-term design reuse through controlled distribution and lifecycle coordination services.
What are the key differences between TDA7406TR and TDA7413TR?
TDA7413TR improves upon TDA7406TR with 95 dB SNR (vs. 90 dB), extended operating temperature (−40°C to +105°C), flexible I²C addressing, and enhanced multipath detection accuracy. Both share identical pinout and core architecture, enabling drop-in replacement in most cases.
Does the TDA7406TR require external passive components for filter tuning?
No - all equalizer, spectrum analyzer, and high-pass filters use internal switch-capacitor topologies with digitally programmable center frequencies and Q factors. Only decoupling capacitors (e.g., 100 nF ceramic at VS) and input/output coupling caps are required per the application diagram.
Can the TDA7406TR drive speakers directly?
No - it provides line-level analog outputs only (OUT LF/RF/LR/RR, SWACOUT). External Class-AB or Class-D amplifiers are required to drive 4 Ω or 8 Ω speakers. The IC includes soft-step control logic compatible with standard amplifier mute/gain interfaces.
TDA7406TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 44-LQFP
- 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
TDA7406TR FAQ
1.How can I place an order for TDA7406TR through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7406TR 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 TDA7406TR reliable?
The price and inventory of TDA7406TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7406TR is usually 5 days.
3.What payment methods are accepted for TDA7406TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7406TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7406TR?
TDA7406TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7406TR 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 TDA7406TR?
For technical support, including TDA7406TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7406TR requirements.
6.How does Aetrix verify that TDA7406TR is sourced from the original manufacturer or authorized distributors?
All TDA7406TR 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 TDA7406TR meets industry standards.
7.What is the process for return or replacement of TDA7406TR?
All TDA7406TR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7406TR, 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 TDA7406TR part is unused and in its original packaging.
Return procedure for TDA7406TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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