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Texas Instruments SN761673DAER
- Part No.:
- SN761673DAER
- Manufacturer:
- Texas Instruments
- Category:
- Video Processing
- Package:
- 32-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN761673DAER.pdf
- Description:
- IC VIDEO TUNER 32TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,750
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Product details
Overview
SN761673DAER from Texas Instruments is a single-chip synthesized TV/VCR tuner IC integrating PLL synthesizer, 3-band (VHF-L/VHF-H/UHF) local oscillators, mixer, 30V tuning voltage amplifier, and four NPN band switch drivers in a 32-pin TSSOP package. It operates from a 5V supply, supports I²C bus control, delivers 20–26 dB conversion gain across bands, and enables precise channel selection via programmable reference divider ratios (512/640/1024) with a 4MHz crystal oscillator.
For engineers reviewing the SN761673DAER datasheet, SN761673DAER pinout, SN761673DAER application, or SN761673DAER equivalent, this device serves as a complete RF-to-IF signal path solution for analog broadcast reception systems requiring stable VHF/UHF tuning, low-noise IF output (≤12.5 dB noise figure), and integrated band switching control without external discrete drivers.
Technical Context
The SN761673DAER implements a fully integrated PLL-based frequency synthesis architecture with dual prescalers (1/8 and 1/32 or 1/33), a 15-bit programmable counter, and selectable reference dividers to support fine-tuning resolution across VHF-L (55–130 MHz), VHF-H (133–364 MHz), and UHF (367–804 MHz) bands. Its on-chip 30V tuning amplifier drives varactor diodes directly, eliminating external high-voltage stages.
Band selection is executed via four NPN emitter-follower outputs (BS1–BS4) capable of sourcing 10 mA per channel at 3.0–3.9 V saturation, while the I²C interface (100–400 kHz clock, 3.0 V VIH, 1.5 V VIL) provides full configuration of PLL parameters, charge pump current (60 µA or 280 µA), and tuning amplifier enable state (OS bit).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - Enables direct compatibility with standard 5V system rails without LDO regulation. |
| Tuning Voltage Output | 0.2–0.46 V low-level / up to 33 V max - Drives varactor-tuned VHF/UHF front-end filters without external HV amplification. |
| Reference Divider Ratios | 512 / 640 / 1024 - Sets tuning step size (e.g., 4 MHz / 1024 = 3.90625 kHz) for precise channel alignment. |
| Conversion Gain | 20–26 dB - Provides sufficient IF signal level (≥117 dBµV at 45.75 MHz) to drive downstream demodulators without gain staging. |
| Noise Figure | 9–12.5 dB - Ensures adequate sensitivity for weak analog broadcast signals in noisy RF environments. |
| I²C Interface Speed | 100–400 kHz - Supports reliable host microcontroller communication with standard timing margins. |
| Band Switch Output Current | 10 mA per port - Directly drives PIN diode or transistor-based RF band-switch networks without buffer transistors. |
Pinout & Package
SN761673DAER is housed in a 32-pin Thin Shrink Small Outline Package (TSSOP, DAE package), 7.0 mm × 12.0 mm body, 0.65 mm pitch, with exposed thermal pad (not electrically connected). Pin 1 is located at bottom-left corner when marking side faces up and notch/pin-1 indicator is left-aligned.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | UHF/VHF RF Inputs | Differential or single-ended antenna inputs for UHF and VHF bands; require external matching networks. |
| 11–14 (BS1–BS4) | Band Switch Drivers | NPN emitter-follower outputs controlling RF filter/band selection; each sinks up to 10 mA into grounded loads. |
| 15, 16 (SDA, SCL) | I²C Interface | Open-drain bidirectional data and clock lines; require external 2.2–10 kΩ pull-up resistors to VCC. |
| 17 (XTAL) | Crystal Oscillator Input | Connects to 4 MHz fundamental-mode crystal (25–300 Ω ESR); internal oscillator circuit provides stable reference. |
| 18 (VTU) | Tuning Voltage Output | High-voltage analog output (up to 33 V) for varactor biasing; requires RC filtering before RF stage connection. |
| 19 (CP) | Charge Pump Output | Drives loop filter capacitor; sets PLL lock stability and transient response via external R-C network. |
| 20 (VCC) | Power Supply | Main 5V supply for mixer, oscillator, PLL, and digital logic; decoupling capacitor required near pin. |
| 21–22 (IF OUT1/OUT2) | IF Signal Outputs | Differential or single-ended 43–45.75 MHz IF outputs; designed for direct connection to SAWS or IF amplifiers. |
| 23, 30, 5 (IF GND, OSC GND, RF GND) | Ground Terminals | Separate ground returns minimize coupling between IF, oscillator, and RF sections; must be joined at single point. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3-band LO synthesis | Eliminates need for three separate oscillator modules and external prescaler logic in analog TV tuners. |
| On-chip 30V tuning amplifier | Removes external high-voltage op-amp or transistor stage, reducing BOM count and PCB area. |
| Four NPN band switch drivers | Directly controls RF front-end bandpass filters without discrete driver transistors or level shifters. |
| I²C-configurable reference divider | Enables flexible channel spacing (e.g., 6 MHz NTSC vs. 7/8 MHz PAL) via software-selectable 512/640/1024 ratio. |
| 15-bit programmable counter | Supports wide frequency coverage (up to 804 MHz UHF) with sub-kHz resolution for accurate station locking. |
Applications
| Analog TV Tuner | VCR RF Demodulator |
|---|---|
Use Scenario: Channel selection and RF-to-IF downconversion in CRT-based analog television receivers supporting NTSC/PAL/SECAM standards. IC Role / Device Role / Timing Role: Primary tuner IC performing mixing, local oscillator generation, IF amplification, and band switching under microcontroller I²C control. Use Value: Single-chip integration reduces component count by >15 parts versus discrete tuner designs while maintaining ≤12.5 dB noise figure and ≥20 dB conversion gain. |
Use Scenario: RF signal processing in analog video cassette recorders for recording/playback of broadcast TV signals. IC Role / Device Role / Timing Role: Front-end tuner providing stable IF output (45.75 MHz) synchronized to tape head timing and playback demodulation circuits. Use Value: Built-in 30V VTU output and band switch drivers eliminate external HV generation and switching logic, simplifying VCR RF board layout. |
| Legacy Set-Top Box | RF Signal Analyzer Front-End |
Use Scenario: Analog broadcast signal reception in early-generation digital cable converter boxes with analog passthrough capability. IC Role / Device Role / Timing Role: Dual-function tuner handling both legacy analog channel tuning and IF conditioning for hybrid analog/digital signal paths. Use Value: Programmable reference divider and I²C interface allow firmware-driven reconfiguration between broadcast standards without hardware change. |
Use Scenario: Calibration-grade RF input stage in portable spectrum analyzers or lab-grade signal monitors covering VHF/UHF broadcast bands. IC Role / Device Role / Timing Role: Precision RF front-end delivering repeatable conversion gain (±0.5 dB typical), low phase noise (≥86 dBc/Hz @ 10 kHz), and stable IF output. Use Value: On-chip 15-bit counter and low-noise mixer enable traceable, repeatable frequency sweeps without external synthesizer dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TV/VCR tuner IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN761672A | Same pinout and core architecture but lacks BS3 driver and uses 28-pin SOIC package; no ADC test output pin. | Reduced band-switching flexibility (3 ports only); unsuitable for 4-port RF filter banks requiring BS3 control. | Select SN761672A only if board space allows larger SOIC and 3-band switching suffices. |
| TA2065F | Discrete tuner IC with separate oscillator and mixer; requires external 30V regulator and band switch transistors; no I²C interface. | Demands additional support components (≥12 extra passives/transistors); manual tuning via potentiometer instead of digital control. | Choose TA2065F only for cost-sensitive, non-software-upgradable legacy designs where I²C control is unnecessary. |
Compared with SN761673DAER, SN761672A offers partial functional overlap but omits BS3 and ADC functionality, while TA2065F requires significantly more external circuitry and lacks digital configurability-making SN761673DAER the optimal choice for compact, software-controlled analog tuner designs.
Availability
SN761673DAER is available at Aetrix Electronics and suitable for analog TV receiver design, VCR RF demodulation, and legacy broadcast set-top box development requiring stable component supply, long-lifecycle support, and consistent electrical performance across production batches.
Supply support for SN761673DAER 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in broadcast and consumer electronics ICs.
The SN761673DAER belongs to TI's legacy TV tuner IC product line, engineered specifically for high-integration analog broadcast reception systems requiring minimal external components, robust RF performance, and I²C-based system-level control.
FAQ
What is the maximum operating frequency range supported by the SN761673DAER?
The SN761673DAER supports RF input frequencies from 55.25 MHz (VHF-L) up to 804 MHz (UHF), covering full analog broadcast bands including NTSC, PAL, and SECAM standards. Its internal VHF-L, VHF-H, and UHF oscillators are optimized for these ranges, with measured conversion gain and noise figure validated across all three bands per the official datasheet.
Does the SN761673DAER include an integrated crystal oscillator circuit?
Yes, the SN761673DAER integrates a crystal oscillator circuit designed for a 4 MHz fundamental-mode crystal (XTAL pin). The oscillator supports crystal impedances from 25 Ω to 300 Ω and delivers stable reference timing for the PLL synthesizer, enabling precise channel tuning without external oscillator components.
How does the SN761673DAER handle band switching for multi-band RF front-ends?
The SN761673DAER provides four dedicated NPN emitter-follower band switch drivers (BS1–BS4), each capable of sourcing 10 mA at 3.0–3.9 V saturation. These outputs are controlled via I²C register bits and directly drive PIN diodes or transistor switches in RF filter banks, eliminating need for external driver transistors.
What is the function of the ADC pin on the SN761673DAER?
The ADC pin on the SN761673DAER serves dual purpose: it accepts analog input voltage (0–VCC) for on-chip 3-bit digitization (A2–A0), and during test mode (T2=1, T0=0), outputs main counter or reference counter values for debug. Its default operation is analog input with 0.03×VCC accuracy, useful for AGC or temperature compensation feedback.
Can the SN761673DAER operate with a supply voltage lower than 5V?
The SN761673DAER is specified for 4.5–5.5 V operation, with nominal 5 V. Operation below 4.5 V is not guaranteed: power-on reset threshold is 2.1–3.5 V, but functional operation (PLL lock, mixer gain, band switch drive) requires ≥4.5 V per Recommended Operating Conditions. Undervoltage may cause loss of tuning voltage output or I²C communication failure.
SN761673DAER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-TSSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Tuner
- Applications:
- Video Display
- Standards:
- -
- Control Interface:
- I2C
- Voltage - Supply:
- 4.5V ~ 5.5V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-TSSOP
SN761673DAER FAQ
1.How can I place an order for SN761673DAER through Aetrix?
Please submit a Request for Quotation (RFQ) for SN761673DAER 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 SN761673DAER reliable?
The price and inventory of SN761673DAER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN761673DAER is usually 5 days.
3.What payment methods are accepted for SN761673DAER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN761673DAER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN761673DAER?
SN761673DAER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN761673DAER 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 SN761673DAER?
For technical support, including SN761673DAER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN761673DAER requirements.
6.How does Aetrix verify that SN761673DAER is sourced from the original manufacturer or authorized distributors?
All SN761673DAER 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 SN761673DAER meets industry standards.
7.What is the process for return or replacement of SN761673DAER?
All SN761673DAER units undergo pre-shipment inspection (PSI). If there is an issue with SN761673DAER, 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 SN761673DAER part is unused and in its original packaging.
Return procedure for SN761673DAER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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