描述 Description

The CXA3250AN is a monolithic TV tuner IC which integrates local oscillator and mixer circuits for VHF band, local oscillator and mixer circuits for UHF band, an IF amplifier and a tuning PLL onto a single chip, enabling further miniaturization of the tuner.

特性 Features

? Superior cross modulation

? Balanced UHF oscillator (4 pins) with excellent oscillation stability

? Supports both I2C and 3-wire bus modes

? Automatic identification of 18, 19 or 27-bit control (during 3-wire bus mode)

? On-chip A/D converter (during I2C bus mode)

? On-chip high voltage drive transistor for charge pump

? Reference frequency selectable from 31.25, 50 or 62.5 kHz (when using a 4 MHz crystal)

? Low-phase noise synthesizer

? On-chip 4-output band switch (supports output voltages from 5 to 9 V)

Applications

? TV tuners

? VCR tuners

? CATV tuners

Structure

Bipolar silicon monolithic IC