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NXP Semiconductors TEF6721HL/V1T,518
- Part No.:
- TEF6721HL/V1T,518
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Receivers
- Package:
- 64-LQFP
- Datasheet:
-
TEF6721HL/V1T,518.pdf
- Description:
- RF RECEIVER AM/FM/WB 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,480
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Product details
Overview
TEF6721HL/V1T,518 from NXP Semiconductors (formerly Philips Semiconductors) is a single-chip car radio tuner IC supporting AM, FM, IBOC DAB, and weather band reception with combined differential 10.7 MHz IF output for SAF7730H DSP interfacing. It integrates AM up-conversion, FM single-conversion with programmable LO injection, on-chip VCO/PLL synthesizer, digital auto-alignment (DAA), and dual-path AGC control. Used in automotive infotainment head units requiring high-sensitivity analog front-end performance across global broadcast bands.
For engineers reviewing the TEF6721HL/V1T,518 datasheet, TEF6721HL/V1T,518 pinout, TEF6721HL/V1T,518 application, or TEF6721HL/V1T,518 equivalent, key selection criteria include its 64-pin LQFP package, 10.7 MHz differential IF output architecture, I²C-programmable band/LO/mixer gain settings, integrated crystal oscillator with frequency pulling, and support for RDS/AF updating algorithms in automotive radio systems.
Technical Context
The TEF6721HL/V1T,518 implements a fast PLL synthesizer with local control for inaudible AF updates, covering US/Europe/Japan/East Europe FM (64–108 MHz), US weather band (162.4–162.55 MHz), and AM LW/MW/SW (0.144–9.99 MHz). Its VCO operates from 159.9 MHz to 248.2 MHz with LC tank tuning and crystal-referenced 20.5 MHz oscillator for PLL stability and RDS timing.
It features separate AM and FM mixer paths feeding a shared IF AGC amplifier with four programmable gain steps, differential 10.7 MHz outputs (IFOUT1/IFOUT2), and dual AGC architectures: FM keyed AGC with I²C-adjustable threshold and AM cascode+PIN diode RF AGC with 40 dB total range. Digital Auto Alignment (DAA) provides 7-bit antenna tank voltage control and 5-bit crystal frequency pulling via DAC outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Range | AM: 0.144–9.99 MHz (LW/MW/SW); FM: 64–108 MHz; Weather Band: 162.4–162.55 MHz - supports global broadcast standards in one device |
| IF Output | Differential 10.7 MHz AM/FM IF signals (IFOUT1/IFOUT2) - directly interfaces SAF7730H and similar IF DSPs without external conversion |
| Supply Voltages | VDDA1–VDDA5: 8.5 V (analog rails); VDDA6/VDDD: 5 V (digital & on-chip supply) - enables high-dynamic-range analog signal chain with low-noise digital control |
| AGC Architecture | FM: keyed AGC with programmable threshold + 6 dB mixer gain control; AM: cascode JFET + PIN diode (40 dB total range) - prevents desensitization in strong-signal environments |
| I²C Interface | Three hardware-selectable addresses (C0h/C2h/C4h); 100 kbit/s max; BUSENABLE pin for bus arbitration - allows multi-device integration on shared automotive I²C buses |
| DAA Functions | 7-bit DAC for FM antenna tank alignment (DAAOUT); 5-bit DAC for crystal oscillator frequency pulling (VDAC) - eliminates manual trimmer adjustments in production |
| Operating Temp | −40 °C to +85 °C - qualified for under-dash automotive deployment without thermal derating |
Pinout & Package
TEF6721HL/V1T,518 is housed in a plastic LQFP64 package (SOT314-2), 10 × 10 × 1.4 mm body size, with exposed thermal pad (not electrically connected). Pin assignment follows standard LQFP64 layout with dedicated analog/digital power domains, RF/IF signal isolation, and I²C control interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AMIFIN / FMIFIN (pins 3/4) | IF AGC amplifier inputs | Accept 10.7 MHz AM/FM IF signals from internal mixers; decoupled via IFDEC (pin 5) for stable gain control |
| FMMIXOUT1/2, AMMIXOUT1/2 (pins 9/11/10/12) | FM/AM mixer differential IF outputs | Enable independent IF filtering paths before IF AGC stage - critical for optimizing AM/FM selectivity separately |
| WBFLAG (pin 27) | Weather band detection flag | Open-collector HIGH-level output indicating active weather band mode - simplifies host MCU band-state monitoring |
| VTUNE (pin 36), CPOUT (pin 37) | VCO tuning interface | VTUNE accepts analog tuning voltage; CPOUT delivers charge pump current - forms closed-loop PLL control with external loop filter |
| ADDRSEL (pin 45), BUSENABLE (pin 46) | I²C address & bus enable | ADDRSEL selects among three I²C addresses (open-circuit/C0h, 120kΩ/C2h, 33kΩ/C4h); BUSENABLE gates I²C activity - supports multi-tuner systems |
| IFAGCMSB/LSB (pins 52/51) | IF AGC gain control inputs | 2-bit parallel interface from IF DSP to select one of four IF AGC amplifier gain steps - enables real-time dynamic range adaptation |
Key Features
| Feature | Design Value |
|---|---|
| Programmable LO Injection | FM mixer supports selectable high-side or low-side LO injection via I²C (FMINJ bit) - optimizes image rejection per regional band requirement |
| FM Mixer Gain Control | +6 dB gain boost selectable via I²C (MIXGAIN bit) - compensates for low-antenna-signal conditions without increasing noise figure |
| Digital Auto Alignment (DAA) | 7-bit DAC (DAAOUT) aligns VCO tuning voltage to FM antenna tank; 5-bit DAC (VDAC) pulls crystal frequency - reduces factory calibration time and cost |
| Weather Band Flag Buffer | WBFLAG pin provides logic-level indication of weather band operation - enables automatic audio path switching in head unit firmware |
| Triple I²C Address Support | Hardware-selectable addresses (C0h/C2h/C4h) via ADDRSEL resistor network - permits multiple TEF6721HL/V1T,518 devices on same bus for multi-band receivers |
| AF Updating Timing Engine | Integrated sequential circuit generates AF sample/hold flags (AFSAMPLE/AFHOLD) synchronized to RDS algorithm - ensures glitch-free alternative frequency handover |
Applications
| Automotive AM/FM Head Unit | IBOC DAB Radio Receiver |
|---|---|
Use Scenario: Integrated analog front-end in OEM car stereo systems supporting AM, FM, and HD Radio (IBOC DAB) decoding. IC Role / Device Role / Timing Role: Tuner front-end providing differential 10.7 MHz IF output to SAF7730H DSP; handles all RF-to-IF conversion, AGC, and PLL synthesis. Use Value: Single-chip solution eliminates discrete tuner modules, reduces BOM count by >15 components, and enables seamless RDS/AF handover via dedicated timing flags. | Use Scenario: HD Radio receiver implementation in North American vehicles requiring simultaneous analog FM and digital IBOC DAB demodulation. IC Role / Device Role / Timing Role: FM tuner core delivering clean 10.7 MHz IF to dual-path IF DSP; supports US FM band (87.9–107.9 MHz) and IBOC-compatible channel spacing. Use Value: Programmable FM mixer gain and keyed AGC prevent overload from strong analog carriers while preserving digital sideband integrity for DAB decoding. |
| Global Multi-Band Radio Platform | Weather Band Alert System |
Use Scenario: Scalable radio platform deployed across US, EU, Japan, and Eastern Europe markets with region-specific band configuration. IC Role / Device Role / Timing Role: Universal tuner IC supporting all major FM/AM bands via I²C-configurable BND[1:0] and AMFM bits; crystal oscillator provides RDS timing reference. Use Value: One hardware design covers six regional variants (US FM, Europe FM, Japan FM, East Europe FM, LW/MW, SW) - cuts NRE and validation effort by 70%. | Use Scenario: Emergency weather alert receiver integrated into fleet management or marine communication systems. IC Role / Device Role / Timing Role: Dedicated weather band tuner (162.4–162.55 MHz) with buffered WBFLAG output signaling active reception. Use Value: WBFLAG pin enables immediate MCU interrupt-driven audio alert activation without polling - meets NOAA/NWS response latency requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar car radio tuner applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si4790x series (e.g., Si47901) | Software-defined radio architecture; integrated ADC/DSP; requires external crystal; no differential 10.7 MHz IF output | Targets next-gen digital radios with firmware-upgradable features; lacks native SAF7730H interface compatibility | Select when migrating to SDR platform with full digital IF processing; not drop-in for existing SAF7730H-based designs |
| TEF6686HN/V1T,518 | Successor IC with enhanced sensitivity (−1.2 µV vs −1.4 µV), wider FM range (76–108 MHz), integrated RDS decoder, and QFN48 package | Designed for modern automotive infotainment with embedded RDS parsing and lower power consumption (IDDA < 35 mA) | Choose for new designs requiring RDS decode offload and smaller footprint; requires PCB redesign due to QFN48 vs LQFP64 |
Compared with Si47901 and TEF6686HN/V1T,518, the TEF6721HL/V1T,518 offers direct SAF7730H interoperability and proven LQFP64 manufacturability but lacks integrated RDS decoding and software-defined flexibility - optimal for cost-sensitive, high-volume legacy automotive platforms.
Availability
TEF6721HL/V1T,518 is available at Aetrix Electronics and suitable for automotive infotainment head units, HD Radio receivers, global multi-band radio platforms, and weather band alert systems requiring stable component supply and long-term production continuity.
Supply support for TEF6721HL/V1T,518 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 is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in automotive radio technology inherited from Philips Semiconductors.
The TEF6721HL/V1T,518 belongs to NXP's legacy automotive tuner product line, engineered specifically for high-fidelity analog front-end performance in cost-sensitive car radio systems requiring robust AM/FM/IBOC DAB reception and seamless integration with SAF7730H IF DSPs.
FAQ
What is the primary function of the TEF6721HL/V1T,518 in an automotive radio system?
The TEF6721HL/V1T,518 serves as the analog tuner front-end IC, performing RF-to-IF downconversion for AM, FM, IBOC DAB, and weather band signals. It delivers differential 10.7 MHz IF outputs to the SAF7730H DSP, integrates PLL synthesis, AGC control, and digital auto-alignment - enabling complete radio reception functionality in a single chip. Its design targets direct compatibility with established automotive IF processing chains.
Does the TEF6721HL/V1T,518 support both high-side and low-side LO injection for FM reception?
Yes, the TEF6721HL/V1T,518 supports programmable LO injection mode for its FM mixer via the I²C-bus FMINJ bit (data byte 4, bit 3). Setting FMINJ = 0 selects low-side injection; FMINJ = 1 selects high-side injection. This feature allows optimization of image rejection across different FM bands (US, Europe, Japan, East Europe) and weather band without hardware changes.
How does the Digital Auto Alignment (DAA) function reduce manufacturing cost for TEF6721HL/V1T,518-based radios?
The TEF6721HL/V1T,518 integrates two DAA functions: a 7-bit DAC (DAAOUT, pin 30) aligns VCO tuning voltage to the FM antenna tank circuit, and a 5-bit DAC (VDAC, pin 60) pulls crystal oscillator frequency. These eliminate manual trimmer capacitors and crystal calibration during production, reducing test time, labor cost, and component count - verified in automotive Tier-1 manufacturing lines using this IC.
What are the supply voltage requirements for the TEF6721HL/V1T,518 analog and digital sections?
The TEF6721HL/V1T,518 requires five 8.5 V analog supplies (VDDA1–VDDA5) for IF AGC, RF stages, VCO, and power regulation, plus one 5 V analog rail (VDDA6) and one 5 V digital supply (VDDD). All analog supplies tolerate 8–9 V range; digital supplies operate at 4.75–5.25 V. Proper decoupling per datasheet Figure 9 is mandatory to maintain 130 dBµV IP3 performance.
Can the TEF6721HL/V1T,518 be used in weather band alert applications, and how is that signaled?
Yes, the TEF6721HL/V1T,518 supports US weather band reception (162.4–162.55 MHz) and provides a dedicated buffered output pin (WBFLAG, pin 27) that goes HIGH when weather band mode is active. This logic-level flag enables immediate MCU-triggered audio alerts without software polling, meeting emergency broadcast system timing requirements. The FM mixer's inherent image rejection ensures clean reception in noisy vehicle environments.
TEF6721HL/V1T,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Frequency:
- -
- Sensitivity:
- -
- Data Rate (Max):
- -
- Modulation or Protocol:
- AM, FM, WB
- Applications:
- AM/FM Radio Receiver
- Current - Receiving:
- -
- Data Interface:
- PCB, Surface Mount
- Memory Size:
- -
- Antenna Connector:
- PCB, Surface Mount
- Features:
- -
- Voltage - Supply:
- 5V, 8.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (10x10)
TEF6721HL/V1T,518 FAQ
1.How can I place an order for TEF6721HL/V1T,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for TEF6721HL/V1T,518 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 TEF6721HL/V1T,518 reliable?
The price and inventory of TEF6721HL/V1T,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TEF6721HL/V1T,518 is usually 5 days.
3.What payment methods are accepted for TEF6721HL/V1T,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TEF6721HL/V1T,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TEF6721HL/V1T,518?
TEF6721HL/V1T,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TEF6721HL/V1T,518 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 TEF6721HL/V1T,518?
For technical support, including TEF6721HL/V1T,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TEF6721HL/V1T,518 requirements.
6.How does Aetrix verify that TEF6721HL/V1T,518 is sourced from the original manufacturer or authorized distributors?
All TEF6721HL/V1T,518 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 TEF6721HL/V1T,518 meets industry standards.
7.What is the process for return or replacement of TEF6721HL/V1T,518?
All TEF6721HL/V1T,518 units undergo pre-shipment inspection (PSI). If there is an issue with TEF6721HL/V1T,518, 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 TEF6721HL/V1T,518 part is unused and in its original packaging.
Return procedure for TEF6721HL/V1T,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TEF6721HL/V1T,518 Tags
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MICRF220AYQS-TR
Microchip Technology
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SX1239IMLTRT
Semtech Corporation
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SI4356-B1A-FMR
Silicon Labs
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SI4362-C2A-GMR
Silicon Labs
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MAX1473EUI+T
Analog Devices Inc./Maxim Integrated
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CMX992Q3
CML Micro
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CMX994AQ4
CML Micro
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MAX2112ETI+
Analog Devices Inc./Maxim Integrated
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MAX2112ETI+T
Analog Devices Inc./Maxim Integrated
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TESEO-LIV3R
STMicroelectronics
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M20048-1
Antenova
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CMX994EQ4
CML Micro
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