CXA3250N

All Band TV Tuner IC with On-chip PLL

**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