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Abracon Corporation - (ABE0101 - ABE0106) Low EMI Spread Spectrum Multiplier Clock

Numéro de référence ABE0104
Description (ABE0101 - ABE0106) Low EMI Spread Spectrum Multiplier Clock
Fabricant Abracon Corporation 
Logo Abracon Corporation 





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ABE0101/02/04/06
Low EMI Spread Spectrum Multiplier Clock
FEATURES
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.
Low short term jitter.
Available in 8-Pin 150mil SOIC.
DESCRIPTION
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
PIN CONFIGURATION
XIN/FIN
XOUT/SD*^
SC0^
SC1^
1
2
3
4
8 VDD
7 SC2^
6 FOUT
5 GND
XIN/FIN = 10 ~ 30 MHz
Note: ^: Internal pull-up resistor (120kfor SD, 30 kfor
SC0-SC2).
*: 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 k).
SD
SC2 SC1
SC0
FOUT
(01)
FOUT
(02)
FOUT
(04)
1 0 0 0 X1 X2 X4
1 0 0 1 X1 X2 X4
0 0 0 1 X1 X2 X4
1 0 1 0 X1 X2 X4
0 0 1 0 X1 X2 X4
1 0 1 1 X1 X2 X4
0 0 1 1 X1 X2 X4
1 1 0 0 X1 X2 X4
0 1 0 0 X1 X2 X4
1 1 0 1 X1 X2 X4
0 1 0 1 X1 X2 X4
1 1 1 0 X1 X2 X4
0 1 1 0 X1 X2 X4
1 1 1 1 X1 X2 X4
Notes: C: Center Spread. A: Asymmetric Spread. D: Down Spread.
FOUT
(06)
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
X6
Magnitude
0.50%
1.00%
1.50%
2.00%
2.50%
3.00%
3.50%
OFF
SST Modulation
Freq.
Type
C ±0.25%
C ±0.5%
D -1.0%
C ±0.75%
A +0.25% ~ -1.25%
C ±1.0%
Fin / 512 A
C
+0.5% ~ -1.5%
±1.25%
A +0.75% ~ -1.75%
C ±1.5%
A +1.0% ~ -2.0%
C ±1.75%
A +1.25% ~ -2.25%
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 1

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