SN761678_14 Datasheet, PDF (1/21 Pages) Texas Instruments – TV/VCR TUNER

SN761678
TV/VCR TUNER
D Single Chip Mixer/Oscillator and
Synthesizer
D 3-Band Local Oscillator
D I²C Bus Protocol
D Bidirectional Data Transmission
D 30-V Tuning Voltage Output
SLES104 − DECEMBER 2003
D 4-Channel NPN-Type Bandswitch Drivers
D Programmable Reference Divider Ratio
(512, 640, or 1024)
D 5-V Power Supply
D 30-Pin TSSOP Package
DBT PACKAGE
(TOP VIEW)
VHI OSC C
1
VHI OSC B
2
OSC GND
3
VLO OSC C
4
VLO OSC B
5
UHF OSC B1
6
UHF OSC C1
7
UHF OSC C2
8
UHF OSC B2
9
IF GND
10
VCC
11
IF OUT
12
CP
13
VTU
14
XTAL
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
description
The SN761678 is a single-chip, synthesized tuner IC designed for TV/VCR tuning systems. The circuit consists
of a PLL synthesizer, 3-band local oscillators and mixer, 30-V output tuning amplifier, four NPN band switch
drivers, and is available in a small package outline. Fifteen-bit programmable counter and reference divider is
controlled by I²C bus protocol. Tuning step frequency is selectable by this reference divider ratio for a 4-MHz
XTAL oscillator.
NOTE: The products, their specifications, service and other information appearing in this
publication are subjected to change by Texas Instruments without notice.
This device has limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during
storage or handling to prevent electrostatic damage to the MOS gates.
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 2003, Texas Instruments Incorporated
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