MK1726-01A
Low EMI Clock Generator
Pin Assignment
Spread Direction and Percentage
Select Table
S1
S0
Spread
Spread
Pin 3 Pin 4
Direction
Percentage
X1/ICLK
VSS
S1
8
7
6
5
1
2
3
4
X2
0
0
0
M
1
Center
Center
Center
Center
No Spread
Down
±1.4
±1.1
±0.6
±0.5
-
VDD
FRSEL
SSCLK
0
S0
M
M
M
1
0
M
1
-1.6
-2.0
-0.7
-3.0
8 pin (150 mil) SOIC/TSSOP
0
Down
1
M
1
Down
1
Down
FRSEL
(pin 6)
Input
Freq. Range
Multiplier
Output
Freq. Range
4.0 to 8.0 MHz
8.0 to 16.0MHz
16.0 to 32.0MHz
0
1
4.0 to 8.0 MHz
8.0 to 16.0MHz
16.0 to 32.0MHz
X1
X1
X1
M
0 = connect to GND
M = unconnected (floating)
1 = connect directly to VDD
Pin Descriptions
Pin
Pin
Pin Type
Pin Description
Number
Name
1
2
3
X1/ICLK
GND
S1
Input
Connect to a 4 to 32 MHz crystal or clock.
Power Connect to ground.
Input
Function select 1 input. Selects spread amount and direction per table above.
(default-internal mid-level).
4
S0
Input
Function select 0 input. Selects spread amount and direction per table above.
(default-internal mid-level).
5
6
7
8
SSCLK
FRSEL
VDD
Output Clock output with Spread spectrum
Input Function select for input frequency range. Default to mid level “M”.
Power Connect to +3.3 V.
XO Crystal connection to a 4 to 32 MHz crystal. Leave unconnected for clock
X2
MDS 1726-01A B
2
Revision 120303
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com