SN761664DBTRG4

Video Processing Overview

The SN761664DBTRG4 is a synthesized tuner IC designed for digital TV tuning systems. It integrates a PLL synthesizer, three-band local oscillator (VHF-L, VHF-H, UHF), and mixer. The device features a 30-V tuning voltage output amplifier, four NPN band-switch drivers, and an RF AGC detector circuit. It utilizes an I2C bus protocol for control and includes a 15-bit programmable counter with selectable reference divider ratios of 24, 28, 50, 64, 80, or 128. The component operates on a 5-V power supply and is housed in a 38-pin Thin Shrink Small-Outline Package (TSSOP).

Video Processing Feature Summary

• Integrates low-phase-noise mixer/oscillator and PLL synthesizer for VHF-L, VHF-H, and UHF bands.
• Supports bidirectional data transmission via I2C bus protocol with address selection capabilities.
• Includes a 30-V tuning voltage output amplifier and four NPN-type band-switch drivers.
• Features an auxiliary port with five-level ADC and an integrated RF AGC detector circuit.

Video Processing Applications

• Digital TV
• Digital CATV
• Set-Top Box

Video Processing Procurement Notes

Verify the specific ordering suffix 'G4' to confirm lead-free and RoHS compliance status as defined by Texas Instruments. Confirm the package type corresponds to the 38-pin TSSOP (DBT) drawing. Ensure the active status aligns with current production data sheets, as availability classifications may change over time. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and revision levels before procurement.

Video Processing Selection Notes

Select this component for designs requiring a single-chip solution for digital TV signal tuning across multiple frequency bands. The integration of the PLL synthesizer and three-band local oscillator reduces external component count. Verify that the system design accommodates the required 5-V supply voltage and supports the necessary I2C communication interface for register configuration and status monitoring.

Video Processing Part Context

This device belongs to the SN7616 series of DTV tuner ICs manufactured by Texas Instruments. It is specifically engineered for applications requiring synthesized tuning with low phase noise. The DBTRG4 designation indicates a tape-and-reel packaging format with green (RoHS compliant and no antimony/bromine flame retardants) material composition, suitable for automated surface-mount assembly processes.

Video Processing Replacement Considerations

Public confirmed substitute part numbers include SN761664DBT and SN761664DBTR. Verify pin compatibility and electrical specifications when substituting between these variants.