MK1704S Integrated Circuit System, MK1704S Datasheet

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MK1704S

Manufacturer Part Number
MK1704S
Description
Manufacturer
Integrated Circuit System
Datasheet

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MDS 1704A C
Description
The MK1704A is an upgraded version of the MK1704
and is recommended for all new designs. It offers more
reduction in the frequency amplitude peaks and will
support frequencies up to 140 MHz.
The MK1704A generates a low EMI output clock from a
clock input. The part is designed to dither the LCD
interface clock or other clocks for flat panel graphics
controllers. The MK1704A uses ICS’ proprietary
mixture of analog and digital Phase Locked Loop (PLL)
technology to synthesize the frequency. It also uses
ICS’ patented technique to spread the frequency
spectrum of the output, thereby reducing the frequency
amplitude peaks by several dB.
ICS offers many other clocks for computers and
computer peripherals. Consult ICS when you need to
remove crystals and oscillators from your board.
Block Diagram
Integrated Circuit Systems, Inc.
Low EMI Enable
or Clock
Crystal
X2
X1
S1:0
2
525 Race Street, San Jose, CA 95126
Oscillator
Crystal
1
and Spread
PLL Clock
Synthesis
Spectrum
Circuitry
GND
VDD
Features
8 pin SOIC package
Provides a spread spectrum output clock
Supports leading flat panel controllers
Accepts a clock input, provides same frequency
dithered output
Optimized for higher resolutions that require up to
140 MHz, as well as 40 MHz (SVGA) and 65 MHz
(XVGA) clocks
Peak reduction by 7 dB - 14 dB typical on 3rd - 19th
odd harmonics
Low EMI feature can be disabled
Operating voltage of 3.3V or 5V
Advanced, low power CMOS process
See the MK1714-01 for a multiplier with low EMI
which can operate from a crystal
Low EMI Clock Generator
tel (408) 295-9800
MK1704A
CLK
www.icst.com
Revision 031003

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MK1704S Summary of contents

Page 1

... Block Diagram 2 S1:0 Low EMI Enable X1 Crystal or Clock X2 MDS 1704A C Integrated Circuit Systems, Inc. Features • 8 pin SOIC package • Provides a spread spectrum output clock • Supports leading flat panel controllers • Accepts a clock input, provides same frequency dithered output • ...

Page 2

... A decoupling capacitor of 0.01µF must be connected between VDD and GND on pins 2 and 3. PCB Layout Recommendations For optimum device performance and lowest output phase noise, the following guidelines should be observed. MDS 1704A C Integrated Circuit Systems, Inc. Output Clock Selection Table Input Min. S0 ...

Page 3

... Parameter Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) MDS 1704A C Integrated Circuit Systems, Inc. away from the MK1704A. This includes signal traces just underneath the device layers adjacent to the ground plane layer used by the device. Another solution is to leave LEE unconnected to anything but a 0 ...

Page 4

... Output Clock Frequency Variation from Mean EMI Peak Frequency Reduction Note 1: Measured with 15pF load Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case MDS 1704A C Integrated Circuit Systems, Inc. Symbol Conditions VDD IDD No load, 3.3V No load Clock input IH ...

Page 5

... MK1704ATR MK1704A 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. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications ...

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