ICS18001 Datasheet, PDF (2/7 Pages) Integrated Circuit Systems – Low EMI Clock Generator

ICS180-01
LOW EMI CLOCK GENERATOR
Pin Assignment
Spread Spectrum Select Table
X1/CLKIN 1
X2 2
GND 3
SS% 4
8 FS2
7 FS1
6 VDD
5 CLKOUT
8-pin (150 mil) SOIC
SS%
(Pin 4)
0
1
Spread
Direction
Down
Down
Spread
Percentage (%)
-1.25%
-3.75%
0 = connect to GND
1 = connect directly to VDD
Note: SS% pin has an internal pull-up resistor
Frequency Range Selection Table
FS2
(Pin 8)
0
0
1
1
FS1
(Pin 7)
0
1
0
1
Frequency Range Selection
(MHz)
8-10
10-15
15-18
18-28
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
Pin
Name
X1/CLKIN
X2
GND
SS%
CLKOUT
VDD
FS1
FS2
Pin Type
Pin Description
Input
Output
Power
Input
Output
Power
Input
Input
Crystal or Clock Input.
Crystal output. Float for a clock input.
Connect to ground.
Select pin for spread amount. See table above. Internal pull-up resistor.
Spread spectrum clock output per table above.
Connect to 3.3 V or 5 V.
Select pin for input frequency. See table above. Internal pull-up resistor.
Select pin for input frequency. See table above. Internal pull-up resistor.
MDS 180-01 B
2
Revision 050405
Integrated Circuit Systemsl 525 Race Street, San Jose, CA 95126 l tel [phone]l www.icst.com