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.

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