SN761642 Datasheet, PDF (1/25 Pages) Texas Instruments – DIGITAL TV TUNER IC

SN761642
www.ti.com................................................................................................................................................................................................. SLES249 – AUGUST 2009
DIGITAL TV TUNER IC
FEATURES
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• 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 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
DIF OUT1 ¹³
DIF OUT2 ¹⁴
AIF OUT ¹⁵
P5/ADC ¹⁶
VCC ¹⁷
XTAL1 ¹⁸
XTAL2 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.
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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 © 2009, Texas Instruments Incorporated