The SN761678 is a single-chip, synthesized tuner IC designed for TV/VCR tuning systems. The circuit consists of a PLL synthesizer, 3-band local oscillators and mixer, 30-V output tuning amplifier, four NPN band switch drivers, and is available in a small package outline. Fifteen-bit programmable counter and reference divider is controlled by I2C bus protocol. Tuning step frequency is selectable by this reference divider ratio for a 4-MHz XTAL oscillator.
●NOTE: The products, their specifications, service and other information appearing in this publication are subjected to change by Texas Instruments without notice.
● Single Chip Mixer/Oscillator and Synthesizer
● 3-Band Local Oscillator
● I2C Bus Protocol
● Bidirectional Data Transmission
● 30-V Tuning Voltage Output
● 4-Channel NPN-Type Bandswitch Drivers
● Programmable Reference Divider Ratio (512, 640, or 1024)
● 5-V Power Supply
● 30-Pin TSSOP Package