SN761678B Datasheet PDF Download, etcTI





(PDF) SN761678B Datasheet Download

Part Number SN761678B
Description TV TUNER IC
Manufacture etcTI
Total Page 21 Pages
PDF Download Download SN761678B Datasheet PDF

Features: www.ti.com FEATURES • Single-Chip Mixe r/Oscillator and Phase-Locked Loop (PLL ) Synthesizer • Three-Band Local Osci llator • I2C Bus Protocol (Bidirectio nal Data Transmission) • 30-V Tuning Voltage Output • Four NPN-Type Band-S witch Drivers • Programmable Referenc e Divider Ratio (512, 640, or 1024) • External 4-Pin Intermediate Frequency (IF) Filter Between Mixer Output and IF Amplifier Input • 5-V Power Supply 30-Pin Thin Shrink Small-Outline Pac kage (TSSOP) APPLICATIONS • TVs • V CR/DVD Recorders • Set-Top Boxes SN7 61678B TV TUNER IC SLES185 – JUNE 200 6 DBT PACKAGE (TOP VIEW) VHI OSC C VH I OSC B OSC GND VLO OSC C VLO OSC B UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B 2 IF GND VCC IF OUT CP VTU XTAL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 30 UHF R F IN 29 VHF RF IN 28 BS4 27 RF GND 26 M IX OUT2 25 MIX OUT1 24 IF IN2 23 IF IN1 22 BS2 21 BS1 20 BS3 19 ADC 18 AS 17 S DA 16 SCL P0038-01 DESCRIPTION The SN 761678B is a synthesized tuner IC designed for TV tuning systems. The circuit consists of.

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www.ti.com
FEATURES
Single-Chip Mixer/Oscillator and
Phase-Locked Loop (PLL) Synthesizer
Three-Band Local Oscillator
I2C Bus Protocol (Bidirectional Data
Transmission)
30-V Tuning Voltage Output
Four NPN-Type Band-Switch Drivers
Programmable Reference Divider Ratio
(512, 640, or 1024)
External 4-Pin Intermediate Frequency (IF)
Filter Between Mixer Output and IF Amplifier
Input
5-V Power Supply
30-Pin Thin Shrink Small-Outline Package
(TSSOP)
APPLICATIONS
TVs
VCR/DVD Recorders
Set-Top Boxes
SN761678B
TV TUNER IC
SLES185 – JUNE 2006
DBT PACKAGE
(TOP VIEW)
VHI OSC C
VHI OSC B
OSC GND
VLO OSC C
VLO OSC B
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
IF GND
VCC
IF OUT
CP
VTU
XTAL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30 UHF RF IN
29 VHF RF IN
28 BS4
27 RF GND
26 MIX OUT2
25 MIX OUT1
24 IF IN2
23 IF IN1
22 BS2
21 BS1
20 BS3
19 ADC
18 AS
17 SDA
16 SCL
P0038-01
DESCRIPTION
The SN761678B is a synthesized tuner IC designed for TV tuning systems. The circuit consists of a
phase-locked loop (PLL) synthesizer, three-band local oscillator and mixer, 30-V output tuning amplifier, and four
NPN band-switch drivers. The device is available in a small-outline package. A 15-bit programmable counter and
reference divider are controlled by I2C bus protocol. Tuning step frequency is selectable by this reference divider
ratio for a crystal oscillator.
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This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
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 © 2006, Texas Instruments Incorporated

                    
                    






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