ICS341 Integrated Circuit System, ICS341 Datasheet

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ICS341

Manufacturer Part Number
ICS341
Description
Field Programmable SS Clock Synthesizerthe ICS341 is a Low Cost, Single-output, Fieldprogrammable Clock Synthesizer. The ICS341 CANgenerate an Output Frequency From 250 KHZ to 200MHz And May Employ Spread Spectrum Techniques Toreduce System Electro-m
Manufacturer
Integrated Circuit System
Datasheet

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MDS 341 E
Description
The ICS341 is a low cost, single-output, field
programmable clock synthesizer. The ICS341 can
generate an output frequency from 250 kHz to 200
MHz and may employ Spread Spectrum techniques to
reduce system electro-magnetic interference (EMI).
Using ICS’ VersaClock
and output, the ICS341 contains a One-Time
Programmable (OTP) ROM to allow field
programmability. Programming features include 4
selectable configuration registers.
The device employs Phase-Locked Loop (PLL)
techniques to run from a standard fundamental mode,
inexpensive crystal, or clock. It can replace multiple
crystals and oscillators, saving board space and cost.
The device also has a power-down feature that
tri-states the clock outputs and turns off the PLLs when
the PDTS pin is taken low.
The ICS341 is also available in factory programmed
custom versions for high-volume applications.
Block Diagram
Integrated Circuit Systems, Inc.
External capacitors are
required with a crystal input.
Crystal or
clock input
X2
X1/ICLK
S1:0
software to configure the PLL
2
OTP ROM
Oscillator
with PLL
Divider
Values
Crystal
525 Race Street, San Jose, CA 95126
Field Programmable SS Clock Synthesizer
PLL Clock Synthesis,
Spred Spectrum and
Control Circuitry
1
GND
VDD
Features
8-pin SOIC package
Highly accurate frequency generation
Output clock frequencies up to 200 MHz
Four ROM locations for frequency and spread
selection
Spread spectrum capability for lower system EMI
Input crystal frequency from 5 to 27 MHz
Input clock frequency from 2 to 50 MHz
Operating voltage of 3.3 V
Advanced, low-power CMOS process
For two output clocks, use the ICS342. For three
output clocks, see the ICS343. For more than three
outputs, see the ICS345 or ICS348.
Available in Pb (lead) free packaging
M/N Multiplier PLL: M = 1...2048, N = 1...1024
Center or Down Spread up to 4% total
Selectable 32 kHz or 120 kHz modulation
PDTS (output and PLL)
tel (408) 297-1201
CLK
ICS341
www.icst.com
Revision 052704

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ICS341 Summary of contents

Page 1

... The device also has a power-down feature that tri-states the clock outputs and turns off the PLLs when the PDTS pin is taken low. The ICS341 is also available in factory programmed custom versions for high-volume applications. Block Diagram OTP ROM ...

Page 2

... The nominal impedance of the clock output is 20Ω. Decoupling Capacitor As with any high-performance mixed-signal IC, the ICS341 must be isolated from system power supply noise to perform optimally. A decoupling capacitor of 0.01µF must be connected between VDD and the PCB ground plane. Crystal Load Capacitors ...

Page 3

... ICS341 Configuration Capabilities The architecture of the ICS341 allows the user to easily configure the device to a wide range of output frequencies, for a given input reference frequency. The frequency multiplier PLL provides a high degree of precision ...

Page 4

... Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS341. These ratings, which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied ...

Page 5

... VDD/2-1 VDD-0.4 2.4 0.4 ±70 20 250 250 525 4 Min. Typ. Max. Units 0.25 200 49- +200 Revision 052704 www.icst.com ● tel (408) 297-1201 ● ICS341 Units Ω kΩ kΩ kΩ pF MHz MHz MHz ...

Page 6

... Still air JA θ 1 m/s air flow JA θ 3 m/s air flow JA θ 525 Race Street, San Jose, CA 95126 Field Programmable SS Clock Synthesizer Min. Typ. Max. Units 150 140 120 40 Revision 052704 www.icst.com ● tel (408) 297-1201 ● ICS341 °C/W °C/W °C/W °C/W ...

Page 7

... ICS341MIP ICS341MIP ICS341MLF ICS341MLF “LF” denotes Pb (lead) free package. While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use ...

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