D Single Chip Mixer/Oscillator and
D 3-Band Local Oscillator
D I2C Bus Protocol
D Bidirectional Data Transmission
D 30-V Tuning Voltage Output
VHI OSC C
VHI OSC B
VLO OSC C
VLO OSC B
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
SLES104 − DECEMBER 2003
D 4-Channel NPN-Type Bandswitch Drivers
D Programmable Reference Divider Ratio
(512, 640, or 1024)
D 5-V Power Supply
D 30-Pin TSSOP Package
UHF RF IN
VHF RF IN
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
NOTE: The products, their specifications, service and other information appearing in this
publication are subjected to change by Texas Instruments without notice.
This device has limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during
storage or handling to prevent electrostatic damage to the MOS gates.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 2003, Texas Instruments Incorporated