ABE0101/02/04/06
Low EMI Spread Spectrum Multiplier Clock
FEATURES
PIN CONFIGURATION
•
Spread Spectrum Clock Generator with selectable
multiplier from 1x to 6x outputs.
Output frequency ranges: 10MHz to 180MHz.
Accepts input from crystal or reference clock.
Selectable Center, Down or Asymmetric Spread
Modulation.
Selectable Modulation rate.
TTL/CMOS compatible outputs.
3.3V Operating Voltage.
XIN/FIN
XOUT/SD*^
SC0^
VDD
1
2
3
4
8
7
6
5
•
•
•
SC2^
FOUT
GND
•
•
•
•
•
SC1^
Low short term jitter.
Available in 8-Pin 150mil SOIC.
XIN/FIN = 10 ~ 30 MHz
Note: ^: Internal pull-up resistor (120kΩ for SD, 30 kΩ for
SC0-SC2).
DESCRIPTION
*: The value of SD is latched upon power-up. The
internal pull-up resistor results in a default high value
when no pull-down resistor is connected to this pin
(recommended external pull-down resistor of 27 kΩ).
The ABE0101/02/04/06 are Spread Spectrum Clock
Generators designed for the purpose of reducing EMI
in high-speed digital systems. Any output frequency
from 10 to 180MHz can be selected by programming
6 multiplier modes. The device is designed to operate
from a crystal or reference clock input and provides
1x to 6x modulated clock outputs.
OUTPUT CLOCK (FOUT) SELECTION
SST Modulation
FOUT FOUT FOUT FOUT
SD SC2 SC1 SC0
(01)
(02)
(04)
(06)
Magnitude
0.50%
Freq.
Type
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
1
1
1
1
0
0
0
0
1
1
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
X1
X1
X1
X1
X1
X1
X1
X1
X1
X1
X1
X1
X1
X1
X2
X2
X2
X2
X2
X2
X2
X2
X2
X2
X2
X2
X2
X2
X4
X4
X4
X4
X4
X4
X4
X4
X4
X4
X4
X4
X4
X4
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
C
C
D
C
A
C
A
C
A
C
A
C
A
±0.25%
±0.5%
1.00%
-1.0%
±0.75%
1.50%
2.00%
2.50%
3.00%
+0.25% ~ -1.25%
±1.0%
+0.5% ~ -1.5%
±1.25%
Fin / 512
+0.75% ~ -1.75%
±1.5%
+1.0% ~ -2.0%
±1.75%
3.50%
OFF
+1.25% ~ -2.25%
Notes: C: Center Spread. A: Asymmetric Spread. D: Down Spread.
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 1