SN761644 Datasheet, PDF (1/30 Pages) Texas Instruments – DIGITAL TV TUNER IC

SN761644
www.ti.com
DIGITAL TV TUNER IC
Check for Samples: SN761644
SLES252 – NOVEMBER 2009
FEATURES
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• 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 1
UHF RF IN1 2
UHF RF IN2 3
VHI RF IN 4
VLO RF IN 5
RF GND 6
MIX OUT2 7
MIX OUT1 8
IF IN 9
RF AGC OUT 10
RF AGC BUF 11
BS3 12
BS2 13
BS1 14
SDA 15
SCL 16
AS 17
BUS GND 18
P5/ADC 19
XTAL OUT 20
XTAL2 21
XTAL1 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.
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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