PRELIMINARY INFORMATION
ICS1726-11
Low EMI Clock Generator
Pin Assignment
X1/ICLK
GND
S1
S0
1
2
3
4
8
7
6
5
X2
VDD
NC
SSCLK
Spread Direction and Percentage
Select Table
S1
Pin 3
S0
Pin 4
Spread
Direction
Spread
Percentage
8 pin (150 mil) SOIC
8-pin (173 mil) TSSOP
0
0
0
M
M
M
1
1
1
0
M
1
0
M
1
0
M
1
Center
Center
Center
Center
No Spread
Down
Down
Down
Down
±1.4
±1.1
±0.6
±0.5
-
-1.6
-2.0
-0.7
-3.0
0 = connect to GND
M = unconnected (floating)
1 = connect directly to VDD
Pin Descriptions
Pin
Number
Pin
Name
Pin Type
Pin Description
1
2
3
4
5
6
7
8
X1/ICLK
GND
S1
S0
SSCLK
NC
VDD
X2
Input
Power
Input
Input
Output
—
Power
XO
Connect to a 16 to 32 MHz crystal or clock.
Connect to ground.
Function select 1 input. Selects spread amount and direction per table above.
(default-internal mid-level).
Function select 0 input. Selects spread amount and direction per table above.
(default-internal mid-level).
Clock output with Spread spectrum.
No connect. Do not connect this pin to anything.
Connect to +3.3 V.
Crystal connection to a 16 to 32 MHz crystal. Leave unconnected for clock.
MDS 1726-11 A
Integrated Circuit Systems, Inc.
●
2
525 Race Street, San Jose, CA 95126
●
Revision 092905
tel (408) 297-1201
●
www.icst.com
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