Datasheet > SN761644

SN761644

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
30页	949K
描述
DIGITAL TV TUNER IC

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SN761644 数据手册

SN761644

www.ti.com

SLES252 –NOVEMBER 2009

DIGITAL TV TUNER IC

Check for Samples: SN761644

FEATURES

DBT PACKAGE

(TOP VIEW)

•

Integrated Mixer/Oscillator/PLL and IF GCA

Mirror Pin Package of SN761640

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

RF AGC Detector Circuit

I²C Bus Protocol

Bidirectional Data Transmission

BS4

UHF RF IN1

UHF RF IN2

VHI RF IN

VLO RF IN

RF GND

MIX OUT2

MIX OUT1

IF IN

VLO OSCB

VLO OSC C

VHI OSC B

VHI OSC C

UHF OSC B1

UHF OSC C1

UHF OSC C2

UHF OSC B2

OSC GND

•

High-Voltage Tuning Voltage Output

Four NPN-Type Band Switch Drivers

One Auxiliary Port/5-Level ADC

Crystal Oscillator Output

RF AGC OUT

RF AGC BUF

BS3

Programmable Reference Divider Ratio

(24/28/32/64/80/128)

VTU

IF GND

•

IF GCA Enable/Disable Control

Selectable digital IFOUT and Analog IFOUT

Standby Mode

BS2

AIF OUT

BS1

DIF OUT1

DIF OUT2

IF GCA CTRL

VCC

SDA

5-V Power Supply

SCL

44-Pin Thin Shrink Small-Outline Package

(TSSOP)

IF GCA IN1

IF GCA IN2

IF GCA GND

IF GCA OUT2

IF GCA OUT1

BUS GND

P5/ADC

XTAL OUT

XTAL2

APPLICATIONS

•

Digital TVs

Digital CATVs

Set-Top Boxes

XTAL1

DESCRIPTION

The SN761644 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. The SN761644 is available in a small-outline package.

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.

12 3 4 5 6 7...30

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