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FS6128-07 Datasheet

  • FS6128-07

  • PLL Clock Generator IC with VCXO

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  • 7頁

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FS6128-07
AMERICAN MICROSYSTEMS, INC.
PLL Clock Generator IC with VCXO
August 2000
1.0
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Features
2.0
Description
Matches MK3727 center frequency characteristics
Phase-locked loop (PLL) device synthesizes output
clock frequency from crystal oscillator or external ref-
erence clock
On-chip tunable voltage-controlled crystal oscillator
(VCXO) allows precise system frequency tuning
3.3V supply voltage
Very low phase noise PLL
Use with 鈥減ullable鈥?14pF crystals 鈥?no external pad-
ding capacitors required
Small circuit board footprint (8-pin 0.150鈥?SOIC)
Custom frequency selections available - contact your
local AMI Sales Representative for more information
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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The FS6128 is a monolithic CMOS clock generator IC
designed to minimize cost and component count in digital
video/audio systems.
At the core of the FS6128 is circuitry that implements a
voltage-controlled crystal oscillator (VCXO) when an ex-
ternal resonator (nominally 13.5MHz) is attached. The
VCXO allows device frequencies to be precisely adjusted
for use in systems that have frequency matching re-
quirements, such as digital satellite receivers.
A high-resolution phase-locked loop generates an output
clock (CLK) through a post-divider. The CLK frequency is
ratiometrically derived from the VCXO frequency. The
locking of the CLK frequency to other system reference
frequencies can eliminate unpredictable artifacts in video
systems and reduce electromagnetic interference (EMI)
due to frequency harmonic stacking.
Figure 1: Pin Configuration
XIN
VDD
XTUNE
VSS
1
2
3
4
8
7
6
5
Table 1: Crystal / Output Frequencies
XOUT
VSS
VDD
CLK
DEVICE
FS6128-07
f
XIN
(MHz)
13.500
CLK (MHz)
27.000
8-pin (0.150鈥? SOIC
Figure 2: Block Diagram
FS6128-07
NOTE: Contact AMI for custom PLL frequencies
XIN
VCXO
XOUT
XTUNE
PLL
DIVIDER
CLK
FS6128-07
American Microsystems, Inc. reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.
ISO9001
8.8.00

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