DATASHEET
SERIALLY PROGRAMMABLE CLOCK SOURCE
Description
The ICS307-01 and ICS307-02 are versatile serially
programmable clock sources which take up very little
board space. They can generate any frequency from 6
to 200 MHz and have a second configurable output.
The outputs can be reprogrammed on the fly and will
lock to a new frequency in 10 ms or less. Smooth
transitions (in which the clock duty cycle remains near
50%) are guaranteed if the output divider is not
changed.
The devices includes a PDTS pin which tri-states the
output clocks and powers down the entire chip.
The ICS307-02 features a default clock output at
start-up and is recommended for all new designs.
This product is intended for clock generation. It has low
output jitter (variation in the output period), but input to
output skew and jitter are not defined nor guaranteed.
For applications which require defined input to output
skew, use the ICS527-01.
ICS307-01/-02
Features
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Packaged in 16-pin (150 mil wide) SOIC
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ICS307M-02 and -02I available in Pb (lead) free
package
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Highly accurate frequency generation
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Serially programmable: user determines the output
frequency via a 3 wire interface
Industrial temperature version available
NOTE: EOL for non-green parts to occur on 5/13/10
per PDN U-09-01
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Eliminates need for custom quartz
Input crystal frequency of 5 - 27 MHz
Output clock frequencies up to 200 MHz
Power down tri-state mode
Very low jitter
Operating voltage of 3.3 V or 5 V
25 mA drive capability at TTL levels
Block Diagram
VDD
TTL
SCLK
DATA
STROBE
X1/ICLK
Crystal or
clock input
Crystal
Oscillator
X2
Shift
Register
9
2
3
2
7
R6:R7
Reference
Divider
V8:V0
C1:C0
S2:S0
F1:F0
VCO
Divider
CLK1
Phase Comparator,
Charge Pump, and
Loop Filter
VCO
Output
Divider
Function
Select
3
S2:S0
GND
3
F1:F0
PDTS
CLK2
Optional crystal capacitors
IDT™ / ICS™
SERIALLY PROGRAMMABLE CLOCK SOURCE
1
ICS307-01/-02 REV H 090209
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
