SN761645 Datasheet PDF Download, etcTI





(PDF) SN761645 Datasheet Download

Part Number SN761645
Description DIGITAL TV TUNER IC
Manufacture etcTI
Total Page 29 Pages
PDF Download Download SN761645 Datasheet PDF

Features: SN761645 www.ti.com DIGITAL TV TUNER I C Check for Samples: SN761645 SLES262 – SEPTEMBER 2010 FEATURES 1 • Inte grated Mixer/Oscillator/PLL and IF GCA • VHF-L, VHF-H, UHF 3-Band Local Osci llator • RF AGC Detector Circuit • I2C Bus Protocol • Seven-Step Charge Pump Current • Four NPN Emitter-Follo wer Type Band Switch Drivers • One Au xiliary Port/5-Level ADC • Programmab le Reference Divider Ratio • Crystal Oscillator 4-MHz/16-MHz Support • Sel ectable Digital IFOUT and Analog IFOUT • Standby Mode • 5-V Power Supply 38-Pin TSSOP Package APPLICATIONS Digital TV • Digital CATV • Set-T op Box VLO OSC VHI OSC UHF OSC1 UHF OS C2 OSC GND CP VTU IF GND AIF OUT DIF OU T1 DIF OUT2 P5/ADC VCC IF GCA IN1 IF GC A IN2 IF GCA CTRL IF GCA GND IF GCA OUT 2 IF GCA OUT1 DBT PACKAGE (TOP VIEW) 1 38 2 37 3 36 4 35 5 34 6 33 7 32 8 31 9 30 10 29 11 28 12 27 13 26 14 25 15 2 4 16 23 17 22 18 21 19 20 BS4 UHF RFIN 1 UHF RFIN2 VHI RFIN VLO RFIN RF GND MIXOUT2 MIXOUT1 IFIN BUS GND RF AGC OUT BS3 BS2 BS1 SDA SCL .

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SN761645
www.ti.com
DIGITAL TV TUNER IC
Check for Samples: SN761645
SLES262 – SEPTEMBER 2010
FEATURES
1
• Integrated Mixer/Oscillator/PLL and IF GCA
• VHF-L, VHF-H, UHF 3-Band Local Oscillator
• RF AGC Detector Circuit
• I2C Bus Protocol
• Seven-Step Charge Pump Current
• Four NPN Emitter-Follower Type Band Switch
Drivers
• One Auxiliary Port/5-Level ADC
• Programmable Reference Divider Ratio
• Crystal Oscillator 4-MHz/16-MHz Support
• Selectable Digital IFOUT and Analog IFOUT
• Standby Mode
• 5-V Power Supply
• 38-Pin TSSOP Package
APPLICATIONS
• Digital TV
• Digital CATV
• Set-Top Box
VLO OSC
VHI OSC
UHF OSC1
UHF OSC2
OSC GND
CP
VTU
IF GND
AIF OUT
DIF OUT1
DIF OUT2
P5/ADC
VCC
IF GCA IN1
IF GCA IN2
IF GCA CTRL
IF GCA GND
IF GCA OUT2
IF GCA OUT1
DBT PACKAGE
(TOP VIEW)
1 38
2 37
3 36
4 35
5 34
6 33
7 32
8 31
9 30
10 29
11 28
12 27
13 26
14 25
15 24
16 23
17 22
18 21
19 20
BS4
UHF RFIN1
UHF RFIN2
VHI RFIN
VLO RFIN
RF GND
MIXOUT2
MIXOUT1
IFIN
BUS GND
RF AGC OUT
BS3
BS2
BS1
SDA
SCL
AS
XTAL2
XTAL1
DESCRIPTION
The SN761645 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, and is available in a small outline package.
ORDERING INFORMATION
For the most current package and ordering information, see the Package Option Addendum at the end of this
document, or see the TI web site at www.ti.com.
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
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 © 2010, Texas Instruments Incorporated

                    
                    






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