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SN761644DBTR Datasheet(PDF) 1 Page - Texas Instruments

Part # SN761644DBTR
Description  DIGITAL TV TUNER IC
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

SN761644DBTR Datasheet(HTML) 1 Page - Texas Instruments

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UHF OSC B2
UHF OSC C2
IF GCA IN1
IF GCA CTRL
DIF OUT2
CP
VTU
DIF OUT1
AIF OUT
VHI OSC C
UHF OSC C1
VLO OSCB
IF GND
VHI OSC B
VLO OSC C
UHF OSC B1
OSC GND
IF GCA GND
IF GCA OUT2
IF GCA OUT1
IF GCA IN2
VCC
BS4
UHF RF IN1
VHI RF IN
IF IN
UHF RF IN2
VLO RF IN
RF GND
MIX OUT2
MIX OUT1
BS3
RF AGC BUF
AS
SCL
RF AGC OUT
BUS GND
BS1
SDA
P5/ADC
XTAL OUT
XTAL2
XTAL1
BS2
SN761644
www.ti.com
SLES252 – NOVEMBER 2009
DIGITAL TV TUNER IC
Check for Samples: SN761644
1
FEATURES
DBT PACKAGE
Integrated Mixer/Oscillator/PLL and IF GCA
(TOP VIEW)
Mirror Pin Package of SN761640
VHF-L, VHF-H, UHF 3-Band Local Oscillator
RF AGC Detector Circuit
I2C Bus Protocol
Bidirectional Data Transmission
High-Voltage Tuning Voltage Output
Four NPN-Type Band Switch Drivers
One Auxiliary Port/5-Level ADC
Crystal Oscillator Output
Programmable Reference Divider Ratio
(24/28/32/64/80/128)
IF GCA Enable/Disable Control
Selectable digital IFOUT and Analog IFOUT
Standby Mode
5-V Power Supply
44-Pin Thin Shrink Small-Outline Package
(TSSOP)
APPLICATIONS
Digital TVs
Digital CATVs
Set-Top Boxes
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.
1
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 © 2009, 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.


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