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VLO OSC B

VLO OSC C

OSC GND

VHI OSC B

VHI OSC C

UHF OSC B1

UHF OSC C1

UHF OSC C2

UHF OSC B2

IF GND

IF OUT1

IF OUT2

VCC

CP

VTU

P5/ADC

XTAL1

XTAL2

XTALOUT

UHF RF IN2

UHF RF IN1

VHI RF IN

VLO RF IN

BS4

RF GND

MIXOUT2

MIXOUT1

NC

BUS GND

RF AGC

AGC FIL2

AGC FIL1

BS3

BS2

BS1

SDA

SCL

AS

DBT PACKAGE

(TOP VIEW)

P0034-02

DESCRIPTION

SN761662

DTV TUNER IC

SLES161 – NOVEMBER 2005

•

Low-Phase-Noise Mixer/Oscillator and PLL

Synthesizer

•

VHF-L, VHF-H, UHF Three-Band Local

Oscillator

•

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

(24/28/50/64/80/128)

•

Standby Mode

•

5-V Power Supply

•

38-Pin TSSOP Package

•

Digital TV

•

Digital CATV

•

Set-Top Box

The SN761662 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, four

NPN band-switch drivers, and is available in a

small-outline

package.

A

15-bit

programmable

bus protocol. Tuning step 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.