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Abracon Corporation - Low EMI Spread Spectrum Multiplier Clock

Numéro de référence ABE0121
Description Low EMI Spread Spectrum Multiplier Clock
Fabricant Abracon Corporation 
Logo Abracon Corporation 





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ABE0121 fiche technique
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ABE0121
Low EMI Spread Spectrum Multiplier Clock
FEATURES
Spread Spectrum Clock Generator with selectable
SST mode.
Output frequency ranges: 24MHz to 200MHz.
Selectable Center Spread Modulation.
TTL/CMOS compatible outputs.
3.3V Operating Voltage.
Low short-term jitter.
Available in 8-Pin 150mil SOIC.
DESCRIPTION
The ABE0121 is a Spread Spectrum Clock Generator
designed for the purpose of reducing EMI in high-
speed digital systems, with selectable Center Spread
modulation magnitude (see table below). The device
operates over a very wide range of input frequencies
and provides a 1x modulated clock output.
PIN CONFIGURATION
FIN 1
S2^ 2
S1^ 3
S0v 4
8 VDD
7 S3^
6 FOUT
5 GND
FIN = 24 ~ 200 Mhz
Note: v: 30kInternal Pull down. ^: 30kInternal Pull up.
SST BY-PASS SELECTOR
S3 Spread Spectrum Mode
0 OFF
1 ON (See below) Default
Note: S3 has an internal Pull Up. Default=”1”
MODULATION MAGNITUDE SELECTION
S2
S1
S0
FIN Range
(MHz)
000
001
010
011
100
101
110
111
24 - 200
24 - 200
24 - 200
24 - 200
24 - 200
24 - 200
24 - 200
24 - 200
FOUT
X1
X1
X1
X1
X1
X1
X1
X1
Spread Spectrum Modulation
Frequency
Fin / 1024
Magnitude
±0.75%
±1.00%
±1.25%
±0.125%
±0.25%
±0.50%
±0.375%
±0.625%
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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