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1.0 Features
• On-chip tunable voltage-controlled crystal oscillator
circuitry (VCXO) allows precise system frequency
tuning (pull range typically 300ppm)
• Uses inexpensive fundamental-mode crystals
• Integrated phase-locked loops (PLL) multiply VCXO
frequency to the higher system frequencies needed
• 3.3V or 5V supply voltage available
• Small circuit board footprint (8-pin 0.150″ SOIC)
• Custom frequency selections available - contact your
local AMI Sales Representative for more information
2.0 Description
The FS6205 is a monolithic CMOS clock generator IC
designed to minimize cost and component count in digital
video/audio systems.
An on-chip voltage-controlled crystal oscillator (VCXO)
permits the reference frequency (or output frequency) to
be tuned to match other frequencies present in the sys-
tem.
Phase-locked loops are used to generate precise output /
reference frequency ratios. See Table 1 for information
on the frequency ratios programmed into each version of
the FS6205.
Figure 1: Pin Configuration
XIN 1
VDD 2
XTUNE 3
VSS 4
8 XOUT
7 MS
6 FS
5 CLK
8-pin (0.150″) SOIC
Table 1: Version Information
DEVICE
VDD
FREF
FS
MS
(nom) (MHz)
0
0
13.500
0
1
FS6205-01 3.3
1
0
13.5135
1
1
NOTE: Contact AMI for custom versions
CLK
(MHz)
27.000
(REF * 2)
74.175824175…
(REF * 500 / 91)
27.027
(REF * 2)
74.580835443…
(REF * 436 / 79)
Figure 2: Block Diagram
XIN
XOUT
XTUNE
VCXO
FS
MS
PLL A
PLL B
MUX
CLK
FS6205
American Microsystems, Inc. reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.
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