SN761644 Description
The SN761644 is a low-phase-noise synthesized tuner IC designed for digital TV tuning systems. The circuit consists of a PLL synthesizer, three-band local oscillator and mixer, RF AGC detector circuit, and IF gain-controlled amplifier. The SN761644 is available in a small-outline package.
SN761644 Key Features
- Integrated Mixer/Oscillator/PLL and IF GCA
- Mirror Pin Package of SN761640
- VHF-L, VHF-H, UHF 3-Band Local Oscillator
- RF AGC Detector Circuit
- I2C Bus Protocol
- High-Voltage Tuning Voltage Output
- Four NPN-Type Band Switch Drivers
- One Auxiliary Port/5-Level ADC
- Crystal Oscillator Output
- Programmable Reference Divider Ratio