SN761668 Datasheet PDF Download, etcTI





(PDF) SN761668 Datasheet Download

Part Number SN761668
Description DIGITAL TV TUNER IC
Manufacture etcTI
Total Page 25 Pages
PDF Download Download SN761668 Datasheet PDF

Features: SN761668 www.ti.com ................... ....................................... ....................................... ....................................... ............. SLES199E – JANUARY 2007 – REVISED APRIL 2008 DIGITAL TV TUNE R IC FEATURES 1 • Integrated Mixer/O scillator/PLL and IF GCA • VHF-L, VHF -H, UHF 3-Band Local Oscillator • RF AGC Detector Circuit • External 4-Pin IF Filter Between Mixer Output and IF Amplifier Input • I2C Bus Protocol Bi directional Data Transmission • High- Voltage Tuning Voltage Output • Four NPN-Type Band-Switch Drivers • One Au xiliary Port/5-Level ADC • Crystal Os cillator Output • Programmable Refere nce Divider Ratio (24/28/50/64/80/128) • Low Distortion IF Gain Controlled A mplifier • Standby Mode • 5-V Power Supply • 44-Pin Thin Shrink Small-Ou tline Package (TSSOP) APPLICATIONS • Digital TVs • Digital CATVs • Set-T op Boxes DBT PACKAGE (TOP VIEW) VLO O SC B VLO OSC C VHI OSC B VHI OSC C OSC GND UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B2 IF GND IF OUT1.

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SN761668
www.ti.com ..................................................................................................................................................... SLES199E – JANUARY 2007 – REVISED APRIL 2008
DIGITAL TV TUNER IC
FEATURES
1
Integrated Mixer/Oscillator/PLL and IF GCA
VHF-L, VHF-H, UHF 3-Band Local Oscillator
RF AGC Detector Circuit
External 4-Pin IF Filter Between Mixer Output
and IF Amplifier Input
I2C Bus Protocol Bidirectional Data
Transmission
High-Voltage Tuning Voltage Output
Four NPN-Type Band-Switch Drivers
One Auxiliary Port/5-Level ADC
Crystal Oscillator Output
Programmable Reference Divider Ratio
(24/28/50/64/80/128)
Low Distortion IF Gain Controlled Amplifier
Standby Mode
5-V Power Supply
44-Pin Thin Shrink Small-Outline Package
(TSSOP)
APPLICATIONS
Digital TVs
Digital CATVs
Set-Top Boxes
DBT PACKAGE
(TOP VIEW)
VLO OSC B
VLO OSC C
VHI OSC B
VHI OSC C
OSC GND
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
IF GND
IF OUT1
IF OUT2
CP
VTU
V
CC
IF GCA IN1
IF GCA IN2
IF GCA CTRL
IF GCA GND
IF GCA OUT2
IF GCA OUT1
P5/ADC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44 BS4
43 UHF RF IN1
42 UHF RF IN2
41 VHI RF IN
40 VLO RF IN
39 RF GND
38 MIXOUT2
37 MIXOUT1
36 IF IN2
35 IF IN1
34 RF AGC OUT
33 RF AGC FIL
32 BS3
31 BS2
30 BS1
29 SDA
28 SCL
27 AS
26 BUS GND
25 XTAL OUT
24 XTAL2
23 XTAL1
DESCRIPTION
The SN761668 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 SN761668 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 © 2007–2008, Texas Instruments Incorporated

                    
                    






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