SN761646 Datasheet, PDF (1/26 Pages) Texas Instruments – DIGITAL TV TUNER IC

SN761646
www.ti.com
DIGITAL TV TUNER IC
Check for Samples: SN761646
SLES251 – NOVEMBER 2009
FEATURES
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• Integrated Mixer/Oscillator/PLL and IF GCA
• VHF-H, UHF 2-Band Local Oscillator
• I²C Bus Protocol (Fixed Address)
• 30-V Tuning Voltage Output
• Two General Purpose Ports
• Selectable Wide/Narrow Band RF AGC
Detector
• Crystal Oscillator 4 MHz/8 MHz/16 MHz
Support
• Programmable Reference Divider Ratio
(24/28/48/56/64/96/128)
• IF GCA Enable/Disable Control
• Standby Mode
• 5-V Power Supply
• 32-Pin Quad Flatpack No Lead (QFN) Package
APPLICATIONS
• Digital TVs
• Digital CATVs
• Set-Top Boxes
RHB PACKAGE
(TOP VIEW)
32 31 30 29 28 27 26 25
UHF OSC C2 1
24 RF GND
UHF OSC B2 2
23 MIXOUT2
OSC GND 3
22 MIXOUT1
CP 4
21 IF IN
VTU 5
20 RFAGC OUT
IF GND 6
19 SDA
IF OUT 7
18 SCL
VCC 8
17 GPP1
9 10 11 12 13 14 15 16
DESCRIPTION
The SN761646 is a low-phase-noise synthesized tuner IC designed for digital TV tuning systems. The circuit
consists of a PLL synthesizer, two-band local oscillator and mixer, RF AGC detector circuit and IF gain controlled
amplifier, and is available in a small outline package.
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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 © 2009, Texas Instruments Incorporated