SN761644 Datasheet PDF Download, etcTI





(PDF) SN761644 Datasheet Download

Part Number SN761644
Description DIGITAL TV TUNER IC
Manufacture etcTI
Total Page 30 Pages
PDF Download Download SN761644 Datasheet PDF

Features: SN761644 www.ti.com DIGITAL TV TUNER I C Check for Samples: SN761644 SLES252 – NOVEMBER 2009 FEATURES 1 • Integ rated Mixer/Oscillator/PLL and IF GCA Mirror Pin Package of SN761640 • V HF-L, VHF-H, UHF 3-Band Local Oscillato r • RF AGC Detector Circuit • I2C B us Protocol Bidirectional Data Transmis sion • High-Voltage Tuning Voltage Ou tput • Four NPN-Type Band Switch Driv ers • One Auxiliary Port/5-Level ADC • Crystal Oscillator Output • Progr ammable Reference Divider Ratio (24/28/ 32/64/80/128) • IF GCA Enable/Disable Control • Selectable digital IFOUT a nd Analog IFOUT • Standby Mode • 5- V Power Supply • 44-Pin Thin Shrink S mall-Outline Package (TSSOP) APPLICATIO NS • Digital TVs • Digital CATVs Set-Top Boxes DBT PACKAGE (TOP VIEW) BS4 UHF RF IN1 UHF RF IN2 VHI RF IN V LO RF IN RF GND MIX OUT2 MIX OUT1 IF IN RF AGC OUT RF AGC BUF BS3 BS2 BS1 SDA SCL AS BUS GND P5/ADC XTAL OUT XTAL2 XT AL1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 44 VLO OSCB 43 VLO OSC C 42 VHI OSC B .

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SN761644
www.ti.com
DIGITAL TV TUNER IC
Check for Samples: SN761644
SLES252 – NOVEMBER 2009
FEATURES
1
• Integrated Mixer/Oscillator/PLL and IF GCA
• Mirror Pin Package of SN761640
• VHF-L, VHF-H, UHF 3-Band Local Oscillator
• RF AGC Detector Circuit
• 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
(24/28/32/64/80/128)
• IF GCA Enable/Disable Control
• Selectable digital IFOUT and Analog IFOUT
• 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)
BS4
UHF RF IN1
UHF RF IN2
VHI RF IN
VLO RF IN
RF GND
MIX OUT2
MIX OUT1
IF IN
RF AGC OUT
RF AGC BUF
BS3
BS2
BS1
SDA
SCL
AS
BUS GND
P5/ADC
XTAL OUT
XTAL2
XTAL1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44 VLO OSCB
43 VLO OSC C
42 VHI OSC B
41 VHI OSC C
40 UHF OSC B1
39 UHF OSC C1
38 UHF OSC C2
37 UHF OSC B2
36 OSC GND
35 CP
34 VTU
33 IF GND
32 AIF OUT
31 DIF OUT1
30 DIF OUT2
29 IF GCA CTRL
28 VCC
27 IF GCA IN1
26 IF GCA IN2
25 IF GCA GND
24 IF GCA OUT2
23 IF GCA OUT1
DESCRIPTION
The SN761644 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 SN761644 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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