SN761645 Datasheet, PDF (1/29 Pages) Texas Instruments – DIGITAL TV TUNER IC

SN761645
www.ti.com
DIGITAL TV TUNER IC
Check for Samples: SN761645
SLES262 – SEPTEMBER 2010
FEATURES
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• Integrated Mixer/Oscillator/PLL and IF GCA
• VHF-L, VHF-H, UHF 3-Band Local Oscillator
• RF AGC Detector Circuit
• I2C Bus Protocol
• Seven-Step Charge Pump Current
• Four NPN Emitter-Follower Type Band Switch
Drivers
• 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
• 5-V Power Supply
• 38-Pin TSSOP Package
APPLICATIONS
• Digital TV
• Digital CATV
• Set-Top Box
VLO OSC
VHI OSC
UHF OSC1
UHF OSC2
OSC GND
CP
VTU
IF GND
AIF OUT
DIF OUT1
DIF OUT2
P5/ADC
VCC
IF GCA IN1
IF GCA IN2
IF GCA CTRL
IF GCA GND
IF GCA OUT2
IF GCA OUT1
DBT PACKAGE
(TOP VIEW)
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BS4
UHF RFIN1
UHF RFIN2
VHI RFIN
VLO RFIN
RF GND
MIXOUT2
MIXOUT1
IFIN
BUS GND
RF AGC OUT
BS3
BS2
BS1
SDA
SCL
AS
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.
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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.
Copyright © 2010, Texas Instruments Incorporated