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SN761646

Texas Instruments
Part Number SN761646
Manufacturer Texas Instruments
Description DIGITAL TV TUNER IC
Published Sep 4, 2019
Detailed Description SN761646 www.ti.com DIGITAL TV TUNER IC Check for Samples: SN761646 SLES251 – NOVEMBER 2009 FEATURES 1 • Integrated ...
Datasheet PDF File SN761646 PDF File

SN761646
SN761646

Overview
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 XTAL2 XTAL1 IFGCA CTRL IFGCA OUT1 IFGCA OUT2 IFGCA GND IFGCA IN2 IFGCA IN1 RHB PACKAGE (TOP VIEW) VHI RFIN UHF RFIN2 UHF RFIN1 GPP2 VHI OSC 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 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 SN761646 SLES251 – NOVEMBER 2009 FUNCTIONAL BLOCK DIAGRAM www.
ti.
com IF IN MIX OUT1 MIX OUT2 UHF OSC B2 UHF OSC C2 UHF OSC C1 UHF OSC B1 VHI OSC C VHI OSC B OSC GND VHF-H OSC UHF OSC IF AMP I...


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