SN761664 Description
The SN761664 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, 30-V output tuning amplifier, and four NPN band-switch drivers, and is available in a small-outline package. A 15-bit programmable counter and reference divider are controlled by I2C bus protocol.
SN761664 Key Features
- Low-Phase-Noise Mixer/Oscillator and PLL Synthesizer
- VHF-L, VHF-H, UHF Three-Band Local Oscillator
- External 4-Pin IF Filter Between Mixer Output and IF Amplifier Input
- I2C Bus Protocol (Bidirectional Data Transmission)
- 30-V Tuning Voltage Output
- Four NPN-Type Band-Switch Drivers
- One Auxiliary-Port, Five-Level ADC
- RF AGC Detector Circuit
- Crystal Oscillator Output
- Programmable Reference Divider Ratio