Datasheet > SN761645

SN761645

更新时间： 2024-09-13 12:21:43

品牌	Logo	应用领域
德州仪器 - TI		电视
页数	文件大小	规格书
29页	1057K
描述
DIGITAL TV TUNER IC

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SN761645 数据手册

SN761645

www.ti.com

SLES262 –SEPTEMBER 2010

DIGITAL TV TUNER IC

Check for Samples: SN761645

FEATURES

DBT PACKAGE

(TOP VIEW)

•

Integrated Mixer/Oscillator/PLL and IF GCA

VHF-L, VHF-H, UHF 3-Band Local Oscillator

RF AGC Detector Circuit

VLO OSC

VHI OSC

UHF OSC1

UHF OSC2

OSC GND

BS4

UHF RFIN1

UHF RFIN2

VHI RFIN

VLO RFIN

RF GND

MIXOUT2

MIXOUT1

IFIN

I2C Bus Protocol

Seven-Step Charge Pump Current

Four NPN Emitter-Follower Type Band Switch

Drivers

VTU

•

One Auxiliary Port/5-Level ADC

Programmable Reference Divider Ratio

Crystal Oscillator 4-MHz/16-MHz Support

Selectable Digital IFOUT and Analog IFOUT

Standby Mode

IF GND

AIF OUT

DIF OUT1

DIF OUT2

P5/ADC

BUS GND

RF AGC OUT

BS3

VCC

BS2

5-V Power Supply

IF GCA IN1

IF GCA IN2

IF GCA CTRL

IF GCA GND

IF GCA OUT2

IF GCA OUT1

BS1

38-Pin TSSOP Package

SDA

SCL

APPLICATIONS

•

Digital TV

Digital CATV

Set-Top Box

XTAL2

XTAL1

DESCRIPTION

The SN761645 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, RF AGC detector circuit, and IF gain

controlled amplifier, and is available in a small outline package.

ORDERING INFORMATION

For the most current package and ordering information, see the Package Option Addendum at the end of this

document, or see the TI web site at www.ti.com.

Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

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 the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

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