TV/VCR Tuner IC With DC/DC Converter - SN761677

SN761677 (OBSOLETE)

TV/VCR Tuner IC With DC/DC Converter

Description

The SN761677 is a single-chip synthesized tuner IC designed for TV/VCR tuning systems. The circuit consists of a PLL synthesizer, 3-band local oscillators and mixer, 30-V dc/dc converter for tuning the amplifier, four NPN emitter follower band drivers, four NPN open collector ports, and is available in a small package outline. The 15-bit programmable counter and reference divider are controlled by I2C bus control. Tuning step frequency is selectable by the reference divider ratio for a 4-MHz X’tal oscillator.

Features

  • Single Chip Mixer/Oscillator, Synthesizer, and 30-V DC/DC Converter for Tuning Amplifier
  • VHF-L, VHF-H, UHF 3-Band Local Oscillator
  • I2C Bus Protocol
  • Four Data Bytes Transmission
  • Low Noise DC/DC Converter
  • 4ch NPN Emitter Follower Type Band Switch Drivers
  • 4ch NPN Open Collector Type Ports
  • Programmable Reference Divider Ratio (31.25 kHz, 50 kHz, or 62 kHz)
  • 5-V Power Supply
  • 38-Pin TSSOP Package

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