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NXP Semiconductors TDA1591T/V3,118
- Part No.:
- TDA1591T/V3,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Encoders, Decoders, Converters
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TDA1591T/V3,118.pdf
- Description:
- IC DECODER STEREO PLL 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,655
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Product details
Overview
TDA1591T/V3,118 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 control (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/V3,118 datasheet, TDA1591T/V3,118 pinout, TDA1591T/V3,118 application, or TDA1591T/V3,118 equivalent, this device serves as a complete analog stereo decoding solution requiring no external oscillator adjustment when used with a 456 kHz ceramic resonator - critical for automotive FM receiver design, noise-immune audio path management, and legacy radio platform continuity.
Technical Context
The TDA1591T/V3,118 implements a voltage-controlled PLL architecture locked to the 19 kHz pilot tone, enabling precise stereo identification and seamless mono/stereo transition via analog SNC input (pin 16). Its internal 4-pole 80 kHz low-pass filter and 2-pole 30 kHz pilot cancellation circuit suppress subcarrier leakage and adjacent-channel interference up to 190 kHz.
Noise blanking is triggered by an independent interference detector (pin 6) with 10 mV typical trigger threshold and 40 µs AF suppression pulse width, while mute control (pin 8) provides 80 dB attenuation. De-emphasis time constant is programmable via HCC (pin 15) from 50–150 µs (Europe) or 75–225 µs (USA) using external capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 7.5–12 V - supports direct connection to automotive battery rail with internal voltage stabilization |
| Supply Current | 12 mA typ - enables low-power operation in always-on car radio head units |
| Audio Output | 900 mV RMS - drives line-level inputs of downstream audio amplifiers without gain staging |
| THD | 0.1% typ - ensures high-fidelity stereo reproduction in vehicle cabin acoustics |
| Channel Separation | 40 dB min - maintains stereo imaging integrity under real-world RF interference conditions |
| Pilot Suppression | 50 dB min at 19 kHz - prevents pilot tone bleed into left/right audio paths |
| ACI Rejection | 80 dB at 114 kHz - blocks adjacent-channel interference from neighboring FM stations |
Pinout & Package
Package: SO20 - plastic small outline package, 20 leads, 7.5 mm body width (SOT163-1), surface-mount compatible with reflow soldering per JEDEC MS-013AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PLL) | Phase-locked loop filter node | Connects external RC network to set PLL loop dynamics and stability margin |
| 2 (OSC) | Oscillator I/O for ceramic resonator | Drives and senses 456 kHz CSB456F11 resonator; no trim capacitor required |
| 5 (VP) | Main supply voltage input | Accepts 7.5–12 V; powers all internal blocks including VCO, detectors, and output stages |
| 6 (INFI) | Interference signal input | Receives IF-level interference detection signal from external level detector for noise blanking trigger |
| 10/11 (VoL/VoR) | Left/right audio output signals | DC-coupled outputs with 130 Ω source impedance; 3.8 V DC bias enables direct coupling to AC-coupled amps |
| 16 (SNC) | Stereo blend control input | Analog voltage (−85 to −32 mV) adjusts channel separation from 6 dB (mono) to 26 dB (stereo) |
| 18 (IDENT) | Pilot presence indicator output | Logic HIGH (≥10 V) confirms valid 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 resistor R1 sets gain and level matching |
Key Features
| Feature | Design Value |
|---|---|
| Adjustment-free 456 kHz PLL oscillator | Eliminates manual tuning; works with Murata CSB456F11 ceramic resonator for production consistency |
| Pilot-dependent mono/stereo switching | Hysteresis of 2 dB prevents chatter during weak-signal transitions; threshold adjustable via external resistors |
| Analog stereo blend (SNC) | Continuous control of channel separation from mono (6 dB) to full stereo (26 dB) using single voltage input |
| Adjacent-channel interference suppression | 80 dB rejection at 114 kHz enables robust reception in dense FM band urban environments |
| Integrated noise blanking at MPX outputs | 40 µs pulse width blanks audio during impulse noise events without audible click artifacts |
| High Cut Control (HCC) | De-emphasis time constant scalable from 50 µs to 225 µs to match regional broadcast standards (EU/US) |
Applications
| Automotive FM Radio Receivers | Aftermarket Stereo Head Units |
|---|---|
|
Use Scenario: Integrated stereo decoding in OEM dashboard radios with analog IF demodulators. IC Role / Device Role / Timing Role: Primary stereo decoder and noise mitigation engine; processes MPX signal, extracts L/R channels, and blanks interference pulses. Use Value: Delivers 76 dB signal-to-noise ratio and 40 dB channel separation in thermally stressed vehicle environments without external PLL tuning components. |
Use Scenario: Cost-optimized replacement stereo decoder in third-party car audio systems. IC Role / Device Role / Timing Role: Drop-in stereo decoding core supporting AM/FM/cassette source selection and analog audio routing. Use Value: Enables mono/stereo auto-switching and SNC-based fade control using only two external potentiometers - reducing BOM count vs. discrete solutions. |
| Legacy Broadcast Equipment | FM Signal Monitoring Tools |
|
Use Scenario: Retrofitting aging FM transmitters/receivers requiring pilot-tone-based stereo compliance. IC Role / Device Role / Timing Role: Reference-grade stereo identification and de-emphasis control block meeting EBU R128 and FCC Part 73 requirements. Use Value: Provides 50 dB pilot suppression and programmable 50–225 µs de-emphasis to satisfy regional broadcast certification tests. |
Use Scenario: Portable field strength meters analyzing FM multiplex signal integrity. IC Role / Device Role / Timing Role: Real-time MPX analysis engine detecting pilot presence, identifying interference sources, and measuring subcarrier suppression. Use Value: Built-in IDENT pin and INFI-triggered blanking allow unambiguous pilot detection and 114/190 kHz ACI quantification without external logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA1591D/V3,118 | DIP20 package (SOT146-1); identical electrical specs and pinout but through-hole mount | Preferred for prototyping, service replacement, or legacy PCBs with DIP footprints | Select when board layout requires through-hole assembly or hand-soldering capability |
| TA2125N | Single-supply (3–5 V), CMOS-based stereo decoder; lacks integrated noise blanking and ACI rejection | Targeted at portable battery-powered radios, not automotive-grade thermal/noise environments | Choose only for low-voltage, low-power consumer devices where 114 kHz ACI immunity is non-critical |
Compared with TDA1591T/V3,118, the DIP variant offers identical performance in through-hole form for serviceability, while TA2125N trades automotive robustness for ultra-low power - making TDA1591T/V3,118 the sole choice for temperature-stable, interference-hardened FM decoding in vehicles.
Availability
TDA1591T/V3,118 is available at Aetrix Electronics and suitable for automotive infotainment systems, aftermarket radio modules, and broadcast monitoring equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TDA1591T/V3,118 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, industrial, and consumer applications.
The TDA1591 series was developed specifically for cost-sensitive, high-volume FM radio receivers demanding integrated stereo decoding, noise immunity, and minimal external component count in automotive environments.
FAQ
What is the recommended ceramic resonator for TDA1591T/V3,118?
The TDA1591T/V3,118 is optimized for use with the Murata CSB456F11 456 kHz ceramic resonator, as specified in the Philips datasheet. This resonator requires no external load capacitors or trimming components due to the IC's internal oscillator design. Using the CSB456F11 ensures guaranteed lock range, frequency stability over −40°C to +85°C, and consistent startup behavior - critical for automotive qualification. Substitutions are not recommended unless fully validated per the TDA1591T/V3,118 oscillator section.
Does TDA1591T/V3,118 support both European and US de-emphasis standards?
Yes, the TDA1591T/V3,118 supports both standards via its High Cut Control (HCC) function on pin 15. With CDEEM = 6.8 nF, de-emphasis ranges from 50–150 µs (European standard); with CDEEM = 10 nF, it covers 75–225 µs (US standard). The control voltage applied between pins 15 and 17 (V15–17) scales the time constant linearly - allowing dynamic adaptation to regional broadcast formats without hardware changes. This dual-standard capability is confirmed in the "CHARACTERISTICS" table on page 7 of the 1996 datasheet.
Can TDA1591T/V3,118 be used without a pilot signal?
Yes, the TDA1591T/V3,118 operates in forced mono mode when the pilot detector input (pin 19) is held below 1 V or when the pilot signal is absent. In this state, stereo blend is disabled and both left/right outputs carry identical mono audio. The device continues full functionality - including noise blanking, de-emphasis, and audio output - making it suitable for AM/FM mono broadcasts or cassette playback integration. Pin 18 (IDENT) will output LOW to indicate absence of pilot, enabling system-level mono indication.
What is the purpose of the SNC pin (pin 16) on TDA1591T/V3,118?
The SNC (Stereo Noise Controller) pin (16) on the TDA1591T/V3,118 accepts an analog control voltage that continuously adjusts channel separation between mono (6 dB) and stereo (26 dB) states. As shown in Figure 5 of the datasheet, applying −85 mV yields mono output, while −32 mV delivers full stereo separation. This enables smooth, artifact-free transitions during weak-signal conditions and allows designers to implement user-controllable stereo blend - a feature essential for reducing noise perception in marginal reception areas without abrupt switching artifacts.
Is TDA1591T/V3,118 RoHS compliant?
The TDA1591T/V3,118 is a legacy 1996-era component manufactured prior to RoHS legislation and does not carry formal RoHS certification. Its lead content exceeds EU Directive 2011/65/EU limits. However, NXP maintains active supply of this part under its "Long-Term Supply Program" for automotive and industrial customers requiring backward compatibility. For new designs, Aetrix recommends verifying exemption eligibility (e.g., Annex III Category 7a for electronic equipment for monitoring and control) or evaluating modern alternatives - though no drop-in RoHS-compliant replacement exists with identical ACI rejection and noise blanking architecture.
TDA1591T/V3,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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/V3,118 FAQ
1.How can I place an order for TDA1591T/V3,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA1591T/V3,118 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/V3,118 reliable?
The price and inventory of TDA1591T/V3,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA1591T/V3,118 is usually 5 days.
3.What payment methods are accepted for TDA1591T/V3,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA1591T/V3,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA1591T/V3,118?
TDA1591T/V3,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA1591T/V3,118 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/V3,118?
For technical support, including TDA1591T/V3,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA1591T/V3,118 requirements.
6.How does Aetrix verify that TDA1591T/V3,118 is sourced from the original manufacturer or authorized distributors?
All TDA1591T/V3,118 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/V3,118 meets industry standards.
7.What is the process for return or replacement of TDA1591T/V3,118?
All TDA1591T/V3,118 units undergo pre-shipment inspection (PSI). If there is an issue with TDA1591T/V3,118, 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/V3,118 part is unused and in its original packaging.
Return procedure for TDA1591T/V3,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDA1591T/V3,118 Tags
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MCP2120T-I/SL
Microchip Technology
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LICAL-ENC-MS001
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TW9990AT-NA1-GR
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LICAL-DEC-MS001-T
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Analog Devices Inc.
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Analog Devices Inc.
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Analog Devices Inc.
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