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NXP Semiconductors TDA6650ATT/C3,518
- Part No.:
- TDA6650ATT/C3,518
- Manufacturer:
- NXP Semiconductors
- Package:
- -
- Datasheet:
-
TDA6650ATT/C3,518.pdf
- Description:
- CONSUMER CIRCUIT, BICMOS, PDSO38
- Quantity:
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Inventory:22,500
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Product details
Overview
TDA6650ATT/C3,518 from NXP Semiconductors is a 5 V programmable 3-band mixer/oscillator and low-phase-noise fractional-N PLL synthesizer for hybrid terrestrial TV tuners supporting ISDB-T and NTSC Japan standards. It integrates three double-balanced mixers (low/mid/high bands), band-specific oscillators, switchable IF amplifier, wideband AGC detector, and 33 V tuning voltage output - enabling single-chip analog/digital tuner front-end design in digital TV sets and set-top boxes.
For engineers reviewing the TDA6650ATT/C3,518 datasheet, TDA6650ATT/C3,518 pinout, TDA6650ATT/C3,518 application, or TDA6650ATT/C3,518 equivalent, key selection criteria include its 3-band RF input range (91.25–765.25 MHz), I²C-bus programmability with four selectable addresses, 8-step charge pump current (40–600 µA), 4 MHz crystal oscillator interface, and support for both symmetrical/asymmetrical IF outputs.
Technical Context
The TDA6650ATT/C3,518 implements a fractional-N PLL architecture with on-chip crystal oscillator (4 MHz), reference divider, phase comparator, charge pump, loop amplifier, and high-voltage transistor driving 33 V tuning voltage directly - eliminating external buffer transistors. Its three independent oscillator/mixer paths are selected via BS1/BS2 PMOS ports, with dedicated input configurations: common-base balanced for high band, common-emitter for low/mid bands.
Control is fully I²C-based (fast-mode compatible) with 6-byte command structure: two divider bytes (N14–N0), two control bytes (AGC, step frequency, charge pump, port states), and status readback including PLL lock flag, power-on reset flag, and AGC/ADC status bits. Band switching, AGC take-over points (6 levels), time constants (2 options), and XTOUT buffer mode are all software-configurable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Range | Low band: 91.25–217.25 MHz; mid band: 217.25–463.25 MHz; high band: 463.25–765.25 MHz - covers full ISDB-T/NTSC Japan terrestrial spectrum |
| PLL Architecture | Fractional-N with on-chip 4 MHz crystal oscillator, reference divider, phase comparator, and integrated loop amplifier - enables precise LO synthesis with low close-in phase noise |
| Charge Pump Current | 8 programmable settings (38–580 µA) - allows optimization of phase noise vs. lock time across bands |
| IF Output Configuration | Switchable symmetrical (IFOUTA/IFOUTB) or asymmetrical (IFOUTA + IFOUTB tied to VCCA) - supports 500 Ω/40 pF SAW filter interfaces |
| I²C Interface | Fast-mode compatible; 4 selectable slave addresses via AS pin; 2.5 V/3.3 V/5 V logic level support via BVS pin - enables mixed-voltage system integration |
| AGC Functionality | 6 programmable take-over points (109–124 dBµV p-p); 2 time constants (50 ms / 2 s); AGC flag output - provides flexible gain control for RF stage adaptation |
| Tuning Voltage Output | Direct 33 V output at VT pin - drives varicap diodes in tracking filters and VCOs without external high-voltage transistor |
Pinout & Package
Package: TSSOP38 (plastic thin shrink small outline package; 38 leads; body width 4.4 mm; lead pitch 0.5 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HBIN1 / HBIN2 | High band RF differential input | Common-base balanced input for 463.25–765.25 MHz band - optimized for high-frequency noise immunity |
| MBIN / LBIN | Mid and low band RF single-ended inputs | Common-emitter configuration - simplifies matching network design for sub-463 MHz bands |
| BS1 / BS2 | Band selection control outputs | PMOS open-drain ports (15 mA) - enable low/mid oscillators/mixers; high band active when both = 0 |
| VT | Tuning voltage output | 33 V DC output - directly biases varicap diodes in oscillator and tracking filter circuits |
| CP | Charge pump output | Drives external loop filter between CP and VT - sets PLL loop dynamics and stability |
| XTAL1 / XTAL2 | Crystal oscillator terminals | Interface to 4 MHz series crystal + 18 pF capacitor - generates stable reference for PLL and optional XTOUT clock |
| XTOUT | Crystal frequency buffer output | Programmable 4 MHz output - drives digital demodulator clock input, reducing BOM count |
| IFOUTA / IFOUTB | Differential IF outputs | Configurable for symmetrical (500 Ω load) or asymmetrical (IFOUTB → VCCA) operation - matches SAW filter impedance |
| AGC | Wideband AGC detector output | Analog voltage output with flag logic - controls RF amplifier gain based on IF signal level |
| SCL / SDA | I²C-bus interface | Two-wire serial control with address selection (AS) and voltage-level adaptation (BVS) - enables multi-device tuner systems |
Key Features
| Feature | Design Value |
|---|---|
| 3-Band Mixer/Oscillator Integration | Single-chip solution replaces discrete mixers, oscillators, and VCOs - reduces PCB area and component count in hybrid TV tuners |
| Fractional-N PLL with On-Chip Loop Amplifier | Eliminates need for external high-voltage transistor at VT pin - simplifies loop filter design and improves reliability |
| Programmable AGC with Dual Time Constants | Enables fast search tuning (50 ms) and stable normal operation (2 s) - adapts to channel scanning vs. locked reception |
| Five PMOS Open-Drain Ports (BS1–BS5) | 15 mA drive capability per port - supports band switching, GPIO, and ADC input sharing without external drivers |
| I²C Address Flexibility (4 Options) | Voltage-selectable via AS pin - allows up to four TDA6650ATT/C3,518 devices on same bus in multi-tuner architectures |
| XTOUT Clock Buffer with Mode Control | Configurable 4 MHz output - supplies demodulator clock or disables to reduce crosstalk during sensitive PLL operation |
Applications
| ISDB-T Terrestrial Tuner | NTSC-J Analog/Digital Hybrid Tuner |
|---|---|
Use Scenario: Digital terrestrial TV reception in Japan using ISDB-T standard with mandatory analog fallback support. IC Role / Device Role / Timing Role: Front-end RF-to-IF conversion and local oscillator synthesis across low/mid/high UHF/VHF bands. Use Value: Enables single-chip tuner supporting full 91.25–765.25 MHz spectrum with programmable step sizes (50–166.67 kHz) and low phase noise for 6 MHz channel spacing. | Use Scenario: Legacy NTSC-J broadcast reception coexisting with ISDB-T in Japanese consumer TVs and recorders. IC Role / Device Role / Timing Role: Simultaneous analog picture carrier downconversion and digital symbol clock generation via XTOUT. Use Value: Reduces bill-of-materials by integrating analog mixer paths and digital clock source - avoids separate analog tuner + digital demodulator clock IC. |
| Cable QAM Tuner | Digital Set-Top Box Front-End |
Use Scenario: QAM64/256 signal reception in cable TV environments requiring wide dynamic range and adjacent channel rejection. IC Role / Device Role / Timing Role: High-linearity 3-band mixing with IF filtering pins (IFFIL1/IFFIL2) and wideband AGC for signal level stabilization. Use Value: Two dedicated IF filter nodes improve adjacent channel rejection >55 dB - critical for dense QAM channel deployments. | Use Scenario: Compact, cost-sensitive STB designs requiring tuner integration with minimal external components. IC Role / Device Role / Timing Role: System-on-module tuner subsystem with I²C-controlled band selection, AGC, and PLL lock monitoring. Use Value: Status byte readback (lock flag, POR flag, AGC flag) enables firmware-driven diagnostics and automatic re-tuning without additional sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-band terrestrial tuner applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA6651ATT/C3 | Different pinout (reordered RF inputs and oscillator pins); identical electrical specs and register map - not pin-compatible | Same ISDB-T/NTSC-J hybrid tuner use case; requires PCB layout revision due to pin mapping change | Select TDA6651ATT/C3 only when redesigning for optimized RF routing or thermal layout - no functional upgrade over TDA6650ATT/C3,518 |
| SI2151-A10-GM | Single-die silicon tuner (RF+IF+demod); no external SAW required; different architecture (no discrete mixer/oscillator stages) | Targets next-gen compact STBs; lacks 33 V VT output and IF filter pins - unsuitable for legacy SAW-based designs | Choose SI2151-A10-GM for new designs prioritizing integration and size; retain TDA6650ATT/C3,518 for existing SAW-filtered tuner platforms |
Compared with TDA6651ATT/C3, the TDA6650ATT/C3,518 offers proven pin compatibility with legacy Japanese TV tuner layouts; compared with SI2151-A10-GM, it preserves design flexibility for SAW-based IF filtering and high-voltage tuning - critical for cost-sensitive, high-volume terrestrial TV production.
Availability
TDA6650ATT/C3,518 is available at Aetrix Electronics and suitable for digital TV sets, digital set-top boxes, and hybrid terrestrial tuners requiring stable component supply and long-term industrial availability.
Supply support for TDA6650ATT/C3,518 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 focused on secure connectivity solutions for automotive, industrial, and consumer applications.
The TDA6650ATT/C3,518 belongs to NXP's TV tuner IC product line, engineered specifically for hybrid analog/digital terrestrial reception in Japanese markets - emphasizing low phase noise, 3-band flexibility, and seamless integration with ISDB-T demodulators.
FAQ
What is the primary application target for the TDA6650ATT/C3,518?
The TDA6650ATT/C3,518 is designed for hybrid terrestrial TV tuners supporting both ISDB-T digital and NTSC-J analog broadcast standards in Japanese consumer electronics. It serves as the complete RF front-end - performing 3-band mixing, oscillator generation, PLL synthesis, AGC control, and IF amplification - in digital TV sets and set-top boxes where backward compatibility and spectral efficiency are critical. Its band limits (91.25–765.25 MHz) and 4 MHz crystal interface align precisely with Japan's regulatory and deployment requirements.
Does the TDA6650ATT/C3,518 support both symmetrical and asymmetrical IF outputs?
Yes, the TDA6650ATT/C3,518 supports both configurations. When used as a symmetrical amplifier, IFOUTA and IFOUTB deliver differential output into 500 Ω loads. For asymmetrical operation, IFOUTB must be connected to VCCA, converting the output to single-ended mode - enabling direct interface with common 500 Ω/40 pF SAW filters. This dual-mode capability is controlled internally and requires no external component changes beyond the IFOUTB connection.
How is band selection implemented on the TDA6650ATT/C3,518?
Band selection on the TDA6650ATT/C3,518 is performed via two dedicated PMOS open-drain output ports: BS1 selects the low band, BS2 selects the mid band, and the high band activates automatically when both BS1 and BS2 are logic low. These ports drive external band-switching diodes or FETs and each provides 15 mA sourcing capability. The state of BS1/BS2 is controlled through I²C write commands (CB2 byte, bits BS1/BS2), allowing dynamic band switching during channel scan or reception.
What are the supported I²C-bus voltage levels for the TDA6650ATT/C3,518?
The TDA6650ATT/C3,518 supports 2.5 V, 3.3 V, and 5 V I²C-bus logic levels. Voltage selection is determined by the state of the BVS pin: grounded for 2.5 V, open-circuit for 3.3 V, and tied to VCC for 5 V operation. This allows direct interfacing with microcontrollers across multiple voltage domains without level-shifting circuitry - a key advantage in mixed-signal tuner designs where baseband processors may operate at different supply voltages than the analog front-end.
Can the XTOUT pin be disabled to reduce noise coupling in sensitive tuner applications?
Yes, the XTOUT pin on the TDA6650ATT/C3,518 can be fully disabled via I²C programming. Setting bits T2–T0 in Control Byte 1 to 000 disables the crystal buffer output, preventing 4 MHz clock injection into the system. This is recommended when the XTOUT signal is unused - especially during PLL lock acquisition - as enabled XTOUT can introduce crosstalk into the low-noise RF path. The default power-on state is enabled (T2–T0 = 001), so explicit disable is required for noise-critical layouts.
TDA6650ATT/C3,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- PLL:
- -
- Input:
- -
- Output:
- -
- Number of Circuits:
- -
- Ratio - Input:Output:
- -
- Differential - Input:Output:
- -
- Frequency - Max:
- -
- Divider/Multiplier:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
TDA6650ATT/C3,518 FAQ
1.How can I place an order for TDA6650ATT/C3,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA6650ATT/C3,518 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 TDA6650ATT/C3,518 reliable?
The price and inventory of TDA6650ATT/C3,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA6650ATT/C3,518 is usually 5 days.
3.What payment methods are accepted for TDA6650ATT/C3,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA6650ATT/C3,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA6650ATT/C3,518?
TDA6650ATT/C3,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA6650ATT/C3,518 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 TDA6650ATT/C3,518?
For technical support, including TDA6650ATT/C3,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA6650ATT/C3,518 requirements.
6.How does Aetrix verify that TDA6650ATT/C3,518 is sourced from the original manufacturer or authorized distributors?
All TDA6650ATT/C3,518 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 TDA6650ATT/C3,518 meets industry standards.
7.What is the process for return or replacement of TDA6650ATT/C3,518?
All TDA6650ATT/C3,518 units undergo pre-shipment inspection (PSI). If there is an issue with TDA6650ATT/C3,518, 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 TDA6650ATT/C3,518 part is unused and in its original packaging.
Return procedure for TDA6650ATT/C3,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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