SN761667
DIGITAL TV TUNER IC
www.ti.com
SLES200–JANUARY 2007
FEATURES
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Integrated Mixer/Oscillator/PLL and IF GCA
QFN PACKAGE
(TOP VIEW)
VHF-L, VHF-H, UHF Three-Band Local
Oscillator
•
•
RF AGC Detector Circuit
I2C Bus Protocol Bidirectional Data
Transmission
40 39 38 37 36 35 34 33 32 31
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•
•
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High-Voltage Tuning Voltage Output
Four NPN-Type Band-Switch Drivers
One Auxiliary Port/5-Level ADC
Crystal Oscillator Output
1
2
3
4
5
6
7
8
9
10
30
29
28
27
26
25
24
23
22
21
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
IF GND
RF GND
MIXOUT1
MIXOUT2
RF AGC OUT
RF AGC FIL
BS3
Programmable Reference Divider Ratio
(24/28/50/64/80/128)
IF OUT1
IF OUT2
BS2
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•
•
•
Low Distortion IF Gain Controlled Amplifier
Standby Mode
CP
BS1
VTU
SDA
VCC
SCL
5-V Power Supply
11 12 13 14 15 16 17 18 19 20
40-Pin Quad Flatpack No-Lead (QFN) Package
APPLICATIONS
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•
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Digital TV
Digital CATV
Set-Top Box
DESCRIPTION
The SN761667 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 SN761667 is available in a small QFN 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.
Copyright © 2007, 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.