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SN761681 - TV TUNER

General Description

The SN761681 is a synthesized tuner IC designed for TV tuning systems.

The circuit consists of a PLL synthesizer, three-band local oscillator and mixer, 30-V output tuning amplifier, four NPN band-switch drivers, and is available in a small-outline package.

Key Features

  • Single-Chip Mixer/Oscillator and PLL Synthesizer.
  • Three-Band Local Oscillator.
  • I2C Bus Protocol (Bidirectional Data Transmission).
  • 30-V Tuning Voltage Output.
  • Four NPN-Type Band-Switch Drivers.
  • Programmable Reference Divider Ratio (512, 640, or 1024 ).
  • 5-V Power Supply.
  • 30-Pin TSSOP Package.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.ti.com FEATURES • Single-Chip Mixer/Oscillator and PLL Synthesizer • Three-Band Local Oscillator • I2C Bus Protocol (Bidirectional Data Transmission) • 30-V Tuning Voltage Output • Four NPN-Type Band-Switch Drivers • Programmable Reference Divider Ratio (512, 640, or 1024 ) • 5-V Power Supply • 30-Pin TSSOP Package APPLICATIONS • TV • VCR/DVD Recorder • Set-Top Box DESCRIPTION The SN761681 is a synthesized tuner IC designed for TV tuning systems. The circuit consists of a PLL synthesizer, three-band local oscillator and mixer, 30-V output tuning amplifier, four NPN band-switch drivers, and is available in a small-outline package. A 15-bit programmable counter and reference divider are controlled by I2C bus protocol.