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VHIOSCC

VHIOSCB

OSCGND

VLOOSCC

VLOOSCB

UHFOSCB1

UHFOSCC1

UHFOSCC2

UHFOSCB2

IFGND

VCC

IFOUT

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(TOP VIEW)

P0038-01

DESCRIPTION

SN761678B

TV TUNER IC

SLES185 – JUNE 2006

•

Single-Chip Mixer/Oscillator and

Phase-Locked Loop (PLL) Synthesizer

•

Three-Band Local Oscillator

•

Transmission)

•

30-V Tuning Voltage Output

•

Four NPN-Type Band-Switch Drivers

•

Programmable Reference Divider Ratio

(512, 640, or 1024)

•

External 4-Pin Intermediate Frequency (IF)

Filter Between Mixer Output and IF Amplifier

Input

•

5-V Power Supply

•

30-Pin Thin Shrink Small-Outline Package

(TSSOP)

•

TVs

•

VCR/DVD Recorders

•

Set-Top Boxes

The SN761678B is a synthesized tuner IC designed for TV tuning systems. The circuit consists of a

phase-locked loop (PLL) synthesizer, three-band local oscillator and mixer, 30-V output tuning amplifier, and four

NPN band-switch drivers. The device is available in a small-outline package. A 15-bit programmable counter and

ratio for a crystal oscillator.

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This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be

more susceptible to damage because very small parametric changes could cause the device not to meet its published

specifications.

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.

Copyright © 2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.