SN761678B - TV TUNER

Texas Instruments

Description

The SN761678B is a synthesized tuner IC designed for TV tuning systems.

The circuit consists of a phase-locked loop (PLL) synthesizer, three-band local oscillator and mixer, 30-V output tuning amplifier, and four NPN band-switch drivers.

The device is available in a small-outline package.

Features

Single-Chip Mixer/Oscillator and Phase-Locked Loop (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).
External 4-Pin Intermediate Frequency (IF) Filter Between Mixer Output and IF Amplifier Input.
5-V Power Supply.
30-Pin Thin Shrink Small-Outline.