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VHI OSC C

VHI OSC B

OSC GND

VLO OSC C

VLO OSC B

UHF OSC B1

UHF OSC C1

UHF OSC C2

UHF OSC B2

IF GND

VCC

IF OUT1

IF OUT2

CP

VTU

UHF RF IN2

UHF RF IN1

VHF RF IN

RF GND

MIX OUT2

MIX OUT1

BS4

BS2

BS1

BS3

ADC

AS

SDA

SCL

XTAL

DBT PACKAGE

(TOP VIEW)

P0038-01

DESCRIPTION

SN761681

TV TUNER IC

SLES165 – DECEMBER 2005

•

Single-Chip Mixer/Oscillator and 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 )

•

5-V Power Supply

•

30-Pin TSSOP Package

•

TV

•

VCR/DVD Recorder

•

Set-Top Box

The SN761681 is a synthesized tuner IC designed for

TV tuning systems. The circuit consists of a PLL

synthesizer, three-band local oscillator and mixer,

30-V output tuning amplifier, four NPN band-switch

drivers, and is available in a small-outline package. A

15-bit programmable counter and reference divider

frequency is selectable by this reference divider ratio

for a crystal oscillator.

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 © 2005, 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.