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NXP Semiconductors TDA1591T/V3,112
- Part No.:
- TDA1591T/V3,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Encoders, Decoders, Converters
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TDA1591T/V3,112.pdf
- Description:
- IC STEREO DECODE PLL 20-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,650
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Product details
Overview
TDA1591T/V3,112 from NXP Semiconductors (formerly Philips) is a monolithic bipolar PLL stereo decoder and noise blanker IC designed for FM car radio systems. It integrates pilot detection, stereo/mono switching, analog stereo blend (SNC), high-cut control (HCC), adjacent-channel interference suppression at 114 kHz, and integrated MPX demodulator output blanking. Operates from 7.5–12 V supply with 12 mA typical current draw and delivers 900 mV RMS audio output.
For engineers reviewing the TDA1591T/V3,112 datasheet, TDA1591T/V3,112 pinout, TDA1591T/V3,112 application in automotive FM receivers, or TDA1591T/V3,112 equivalent for stereo decoding and noise suppression functions, this page provides verified functional specifications, package mapping to SO20 (SOT163-1), validated pin roles, and confirmed alternative options aligned with legacy Philips/NXP FM signal processing requirements.
Technical Context
The TDA1591T/V3,112 implements a voltage-controlled PLL oscillator locked to a 456 kHz ceramic resonator (CSB456F11) for precise 19 kHz pilot recovery. Its phase detector drives logic-controlled gating of AF outputs to enable noise blanking synchronized with interference detection at pin 6.
It supports analog mono/stereo blending via SNC input (pin 16) and de-emphasis adjustment via HCC (pin 15), with reference voltage range 1–5 V applied to pin 17. Channel separation reaches 40 dB, THD is 0.1% typ., and adjacent-channel interference rejection exceeds 80 dB at 114 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 7.5–12 V - Enables direct integration into automotive 12 V battery systems with built-in voltage stabilization. |
| Supply Current | 12 mA typ. - Low quiescent draw suitable for always-on car radio front-end operation. |
| Audio Output (RMS) | 900 mV - Delivers line-level AF signal compatible with downstream power amplifiers without gain staging. |
| Total Harmonic Distortion | 0.1% typ. - Ensures high-fidelity stereo audio reproduction in vehicle cabin environments. |
| Channel Separation | 40 dB - Maintains distinct left/right imaging critical for stereo localization in automotive audio. |
| Adjacent-Channel Rejection | 80 dB at 114 kHz - Suppresses co-channel interference from adjacent FM stations during weak-signal reception. |
| Pilot Detection Threshold | 24–30 mV RMS - Enables reliable stereo activation under low-SNR FM conditions typical in mobile reception. |
Pinout & Package
Package: SO20 (plastic small outline, 20 leads, body width 7.5 mm, SOT163-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PLL) | Phase-locked loop filter node | Connects external RC network to set PLL loop bandwidth and stability for 19 kHz pilot lock. |
| 2 (OSC) | Oscillator I/O for ceramic resonator | Drives and senses 456 kHz CSB456F11 resonator; no external capacitor required. |
| 3 (GND) | Analog ground reference | Common return for all internal analog blocks; must be low-impedance and separated from digital/power ground. |
| 5 (VP) | Main supply voltage input | Accepts 7.5–12 V; powers internal voltage stabilizer and all functional blocks. |
| 6 (INFI) | Interference signal input | Receives IF-level interference pulses from external detector; triggers noise blanking gate. |
| 10 & 11 (VoL / VoR) | Left/right audio output signals | DC-coupled AF outputs; each provides 900 mV RMS into specified load with ≤0.1% THD. |
| 16 (SNC) | Stereo blend control input | Analog voltage adjusts channel separation from 6 dB (mono) to 26 dB (full stereo) per Fig.5. |
| 17 (Vref) | External reference voltage input | 1–5 V setting defines operating point for SNC, HCC, and pilot threshold hysteresis. |
| 18 (IDENT) | Pilot presence indicator output | Logic HIGH (≥10 V) confirms detected 19 kHz pilot; used for stereo status LED or microcontroller flag. |
| 20 (Vi MPX) | MPX composite input | Accepts 1.7 Vp-p FM demodulator output; input impedance set by external R1 (150 kΩ typical). |
Key Features
| Feature | Design Value |
|---|---|
| Adjustment-free 456 kHz PLL oscillator | Eliminates manual tuning; enables stable pilot recovery using Murata CSB456F11 ceramic resonator. |
| Pilot-dependent mono/stereo switching | Automatically transitions between mono and stereo based on real-time 19 kHz pilot amplitude (24–30 mV RMS). |
| Analog stereo blend (SNC) | Smoothly varies channel separation from 6 dB to 26 dB via DC voltage on pin 16, reducing stereo artifacts in weak-signal zones. |
| High Cut Control (HCC) | Adjusts de-emphasis time constant from 50 µs (EU) to 150 µs or 75–225 µs (USA) via analog voltage on pin 15. |
| Integrated interference noise detector | Detects 120 kHz interference bursts and triggers <40 µs blanking pulses at AF outputs to suppress click/pop artifacts. |
Applications
| Automotive FM Radio Receiver | Aftermarket Stereo Head Unit |
|---|---|
Use Scenario: Integrated stereo decoding and noise suppression in OEM dashboard-mounted FM radios operating across −40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Primary MPX demodulator post-IF stage; performs pilot recovery, L/R separation, de-emphasis, and interference-triggered blanking. Use Value: Delivers 76 dB signal-to-noise ratio and 40 dB channel separation while suppressing 114 kHz adjacent-channel interference-critical for highway-speed reception. |
Use Scenario: Cost-optimized replacement stereo decoder in third-party car audio head units requiring plug-compatible analog interface. IC Role / Device Role / Timing Role: Standalone stereo decoder IC interfacing directly with FM IF demodulator ICs (e.g., TDA7000 series) and audio preamps. Use Value: Enables mono/stereo auto-switching and analog SNC blending without microcontroller intervention-reducing BOM count and firmware complexity. |
| FM Bandwidth Extension Module | Traffic Message Channel (TMC) Receiver Front-End |
Use Scenario: Enhancing legacy FM tuners to support extended IF bandwidth for digital subcarriers (e.g., RDS, ARI) while preserving analog stereo quality. IC Role / Device Role / Timing Role: Provides selective 57 kHz ARI and 67 kHz SCA subcarrier rejection (≥70 dB) alongside main stereo path. Use Value: Achieves 70 dB ARI suppression and 70 dB SCA rejection without external filters-enabling clean analog audio despite subcarrier presence. |
Use Scenario: Front-end signal conditioning for TMC-capable receivers where 57 kHz ARI subcarrier must be rejected without degrading 19 kHz pilot integrity. IC Role / Device Role / Timing Role: Pilot-locked PLL decoder with dedicated ARI rejection path (α57ARI = 70 dB) and independent interference blanking. Use Value: Maintains 50 dB pilot suppression while rejecting ARI at 57 kHz-ensuring reliable TMC data decoding without stereo dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo decoding and noise suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA1591D/V3,112 | DIP20 package (SOT146-1); identical electrical specs and pinout but through-hole mounting. | Used in legacy PCB designs with DIP sockets or wave-soldered assemblies; not surface-mount compatible. | Select when replacing aging DIP-based car radio boards or prototyping with breadboard-friendly layout. |
| TEA5767HN | I²C-programmable single-chip FM tuner with integrated IF, ADC, and DSP; no external resonator needed. | Replaces full tuner chain-not just decoder-requiring firmware integration and digital interface redesign. | Choose for new designs needing software-tunable de-emphasis, RDS parsing, or frequency agility; not drop-in for analog MPX input systems. |
Compared with TDA1591T/V3,112, the DIP variant offers identical analog performance in through-hole format, while TEA5767HN shifts architecture to digital control-making it unsuitable for analog-only signal paths but enabling advanced features like automatic station search and RDS decoding.
Availability
TDA1591T/V3,112 is available at Aetrix Electronics and suitable for automotive infotainment systems, aftermarket stereo head units, and FM band extension modules requiring stable component supply and long-lifecycle support.
Supply support for TDA1591T/V3,112 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
NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-reliability analog and mixed-signal ICs for automotive and consumer electronics.
The TDA1591T/V3,112 belongs to NXP's legacy automotive audio signal processing portfolio, engineered specifically for robust FM stereo decoding in harsh vehicular environments with wide temperature and supply voltage tolerance.
FAQ
What is the function of pin 17 (Vref) on the TDA1591T/V3,112?
Pin 17 accepts an externally applied reference voltage from 1 V to 5 V, which sets the operating point for multiple analog control functions: stereo blend (SNC), high-cut control (HCC), and pilot detection hysteresis. This single reference ensures coordinated behavior across mono/stereo transition, de-emphasis adjustment, and identification logic-enabling consistent audio response across varying signal conditions in the TDA1591T/V3,112.
Does the TDA1591T/V3,112 require an external crystal or resonator?
Yes, the TDA1591T/V3,112 requires a 456 kHz ceramic resonator (e.g., Murata CSB456F11) connected to pin 2 (OSC). Unlike quartz crystals, this resonator operates without external load capacitors due to the IC's internal oscillator design-making the TDA1591T/V3,112 adjustment-free and optimized for cost-sensitive automotive applications where board space and BOM count matter.
Can the TDA1591T/V3,112 be used in non-automotive FM receivers?
Yes, the TDA1591T/V3,112 is applicable in any FM receiver requiring analog stereo decoding and noise blanking-including portable radios, marine audio systems, and test equipment-provided the supply voltage remains within 7.5–12 V and ambient temperature stays within −40°C to +85°C. Its 114 kHz adjacent-channel rejection and 76 dB S/N ratio deliver performance consistent with broadcast-grade reception outside automotive use cases.
What is the purpose of pins 13 and 14 (CDEEL and CDEER) on the TDA1591T/V3,112?
Pins 13 and 14 accept external de-emphasis capacitors (typically 6.8 nF for EU or 10 nF for USA standards) that set the base de-emphasis time constant. When combined with HCC control on pin 15, they enable dynamic adjustment of the de-emphasis curve-allowing the TDA1591T/V3,112 to comply with regional broadcast standards while supporting user-selectable high-frequency roll-off for noise reduction in weak-signal conditions.
How does the noise blanking function work in the TDA1591T/V3,112?
Noise blanking in the TDA1591T/V3,112 is triggered by interference pulses applied to pin 6 (INFI), typically sourced from an external IF-level detector. Upon detection, the IC gates its left and right audio outputs (pins 10 and 11) for ≤40 µs, suppressing clicks and pops caused by impulse noise-without muting the entire signal path. This preserves audio continuity while eliminating transient artifacts, a key requirement for mobile FM reception where interference is frequent and unpredictable.
TDA1591T/V3,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Audio Decoder
- Applications:
- Radio
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- 7.5V ~ 12V
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
TDA1591T/V3,112 FAQ
1.How can I place an order for TDA1591T/V3,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA1591T/V3,112 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 TDA1591T/V3,112 reliable?
The price and inventory of TDA1591T/V3,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA1591T/V3,112 is usually 5 days.
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TDA1591T/V3,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA1591T/V3,112 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 TDA1591T/V3,112?
For technical support, including TDA1591T/V3,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA1591T/V3,112 requirements.
6.How does Aetrix verify that TDA1591T/V3,112 is sourced from the original manufacturer or authorized distributors?
All TDA1591T/V3,112 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 TDA1591T/V3,112 meets industry standards.
7.What is the process for return or replacement of TDA1591T/V3,112?
All TDA1591T/V3,112 units undergo pre-shipment inspection (PSI). If there is an issue with TDA1591T/V3,112, 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 TDA1591T/V3,112 part is unused and in its original packaging.
Return procedure for TDA1591T/V3,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDA1591T/V3,112 Tags
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MCP2120T-I/SL
Microchip Technology
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LICAL-ENC-MS001
TE Connectivity Linx
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TW9990AT-NA1-GR
Renesas
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TVP5151IPBSR
Texas Instruments
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TVP5150AM1IPBSR
Texas Instruments
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LICAL-DEC-MS001-T
TE Connectivity Linx
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ADV7391BCPZ
Analog Devices Inc.
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ADV7393BCPZ-REEL
Analog Devices Inc.
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ADV7393BCPZ
Analog Devices Inc.
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ADV7391WBCPZ
Analog Devices Inc.
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ADV7181DBCPZ
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ADV7181CBSTZ-REEL
Analog Devices Inc.
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