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Functional Block Diagram

B0089-02

IF

Amp

Op

Amp

XTAL

Osc 4 MHz

1/8

Prescaler

512/640/1024

Divider

1/32, 1/33

Prescaler

Phase

Detector

15-Bit

Counter

Charge

Pump

I C Bus

2

Interface

5-Level

ADC

IF OUT1

IF GND

VTU

CP

IF OUT2

UHF RF IN2

VHF RF IN

UHF RF IN1

RF GND

XTAL

SCL

SDA

AS

NPN Band Switch Port

VHF-L

Osc

VHF-H

Osc

UHF

Osc

VHF

Mixer

UHF

Mixer

SN761681

TV TUNER IC

SLES165 – DECEMBER 2005

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.

2