MK1707 Datasheet, PDF (1/6 Pages) Integrated Circuit Systems – Low EMI Clock Generator

MK1707
Low EMI Clock Generator
Description
The MK1707 generates a low EMI output clock from a
clock input. The part is designed to dither the LCD
interface clock for flat panel graphics controllers. The
device uses ICS’ proprietary mix of analog and digital
Phase Locked Loop (PLL) technology to spread the
frequency spectrum of the output, thereby reducing the
frequency amplitude peaks by several dB.
The MK1707 offers both centered and down spread
from a high speed clock input. Refer to the
MK1714-01/02 for a crystal input and the widest
selection of input frequencies and multipliers.
ICS offers many other clocks for computers and
computer peripherals. Consult us when you need to
remove crystals and oscillators from your board.
Features
• Packaged in 8-pin SOIC
• Available in Pb-free package
• Industrial temperature range available
• Provides a spread spectrum output clock
• Supports ATI’s flat panel controllers
• Guaranteed to +85°C operation
• Accepts a clock input, provides same frequency
dithered output
• Good for all VGA modes from 80 to 167 MHz
• Peak reduction by 7dB - 14dB typical on 3rd - 19th
odd harmonics
• Low EMI feature can be disabled
• Includes Power-down
• Operating voltage of 3.3 V or 5 V
• Advanced, low-power CMOS process
Block Diagram
VDD
2
S1:0
Spread Direction
Low EMI Enable
ICLK
Input
Buffer
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
Clock Out
GND
MDS 1707 G
1
Revision 032204
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel [phone] ● www.icst.com