SN761640 Datasheet, PDF (1/30 Pages) Texas Instruments – DIGITAL TV TUNER IC

SN761640
www.ti.com .............................................................................................................................................................................................. SLES237 – OCTOBER 2008
DIGITAL TV TUNER IC
FEATURES
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• Integrated Mixer/Oscillator/PLL and IF GCA
• 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)
VLO OSC B 1
VLO OSC C ²
VHI OSC B ³
VHI OSC C ⁴
UHF OSC B1 ⁵
UHF OSC C1 ⁶
UHF OSC C2 ⁷
UHF OSC B2 ⁸
OSC GND ⁹
CP ¹⁰
VTU ¹¹
IF GND ¹²
AIF OUT ¹³
DIF OUT1 14
DIF OUT2 15
IFGCA CTRL ¹⁶
VCC 17
IF GCA IN1 18
IF GCA IN2 19
IF GCA GND 20
IF GCA OUT2 21
IF GCA OUT1 22
44 BS4
43 UHF RF IN1
42 UHF RF IN2
41 VHI RF IN
40 VLO RF IN
39 RF GND
38 MIX OUT2
37 MIX OUT1
36 IF IN
35 RF AGC OUT
34 RF AGC BUF
33 BS3
32 BS2
31 BS1
30 SDA
29 SCL
28 AS
27 BUS GND
26 P5/ADC
25 XTAL OUT
24 XTAL2
23 XTAL1
DESCRIPTION
The SN761640 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 SN761640 is available in a small-outline package.
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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 © 2008, Texas Instruments Incorporated