SN761646 Datasheet PDF Download, etcTI





(PDF) SN761646 Datasheet Download

Part Number SN761646
Description DIGITAL TV TUNER IC
Manufacture etcTI
Total Page 26 Pages
PDF Download Download SN761646 Datasheet PDF

Features: SN761646 www.ti.com DIGITAL TV TUNER I C Check for Samples: SN761646 SLES251 – NOVEMBER 2009 FEATURES 1 • Integ rated Mixer/Oscillator/PLL and IF GCA VHF-H, UHF 2-Band Local Oscillator I2C Bus Protocol (Fixed Address) • 30-V Tuning Voltage Output • Two Gen eral Purpose Ports • Selectable Wide/ Narrow Band RF AGC Detector • Crystal Oscillator 4 MHz/8 MHz/16 MHz Support • Programmable Reference Divider Rati o (24/28/48/56/64/96/128) • IF GCA En able/Disable Control • Standby Mode 5-V Power Supply • 32-Pin Quad Fla tpack No Lead (QFN) Package APPLICATION S • Digital TVs • Digital CATVs • Set-Top Boxes XTAL2 XTAL1 IFGCA CTRL IFGCA OUT1 IFGCA OUT2 IFGCA GND IFGCA I N2 IFGCA IN1 RHB PACKAGE (TOP VIEW) V HI RFIN UHF RFIN2 UHF RFIN1 GPP2 VHI OS C B VHI OSC C UHF OSC B1 UHF OSC C1 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 DE.

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SN761646
www.ti.com
DIGITAL TV TUNER IC
Check for Samples: SN761646
SLES251 – NOVEMBER 2009
FEATURES
1
• 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.
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.
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

                    
                    






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