SN761642 Datasheet PDF Download, etcTI





(PDF) SN761642 Datasheet Download

Part Number SN761642
Description DIGITAL TV TUNER IC
Manufacture etcTI
Total Page 25 Pages
PDF Download Download SN761642 Datasheet PDF

Features: SN761642 www.ti.com.................... ....................................... ....................................... ....................................... ....................................... ................. SLES249 – AUGUST 20 09 DIGITAL TV TUNER IC FEATURES 1 • Integrated Mixer/Oscillator/PLL • VHF -L, VHF-H, UHF 3-Band Local Oscillator • RF AGC Detector Circuit • I2C Bus Protocol Bidirectional Data Transmissi on • High-Voltage Tuning Voltage Outp ut • Four NPN-Type Band Switch Driver s • One Auxiliary Port/5-Level ADC Crystal Oscillator Output • Program mable Reference Divider Ratio (24/28/32 /64/80/128) • Selectable Digital IFOU T and Analog IFOUT • Standby Mode • 5-V Power Supply • 38-Pin Thin Shrin k Small-Outline Package (TSSOP) APPLICA TIONS • Digital TVs • Digital CATVs • Set-Top Boxes DBT PACKAGE (TOP VI EW) VLO OSC B VLO OSC C VHI OSC B VHI OSC C UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B2 OSC GND CP VTU IF GND DIF OUT1 DIF OUT2 AIF OUT P5/ADC VCC XTAL1 XTAL2 1 2 3 4 5 6 7 .

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SN761642
www.ti.com................................................................................................................................................................................................. SLES249 – AUGUST 2009
DIGITAL TV TUNER IC
FEATURES
1
Integrated Mixer/Oscillator/PLL
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)
Selectable Digital IFOUT and Analog IFOUT
Standby Mode
5-V Power Supply
38-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
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
OSC GND
CP
VTU
IF GND
DIF OUT1
DIF OUT2
AIF OUT
P5/ADC
VCC
XTAL1
XTAL2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
38 BS4
37 UHF RF IN1
36 UHF RF IN2
35 VHI RF IN
34 VLO RF IN
33 RF GND
32 MIX OUT2
31 MIX OUT1
30 IF IN
29 RF AGC OUT
28 RF AGC BUF
27 BS3
26 BS2
25 BS1
24 SDA
23 SCL
22 AS
21 BUS GND
20 XTAL OUT
DESCRIPTION
The SN761642 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, and RF AGC detector circuit. The SN761642
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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