鈥?/div>
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.
PIN CONFIGURATION
FIN
S2^
S1^
S0
v
1
8
VDD
S3^
FOUT
GND
ABE0121
2
3
4
7
6
5
FIN = 24 ~ 200 Mhz
Note:
v: 30k鈩?Internal Pull down. ^: 30k鈩?Internal Pull up.
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.
SST BY-PASS SELECTOR
S3
0
1
Spread Spectrum Mode
OFF
ON (See below) Default
Note:
S3 has an internal Pull Up. Default=鈥?鈥?/div>
MODULATION MAGNITUDE SELECTION
S2
0
0
0
0
1
1
1
1
S1
0
0
1
1
0
0
1
1
S0
0
1
0
1
0
1
0
1
FIN Range
(MHz)
24
24
24
24
24
24
24
24
-
-
-
-
-
-
-
-
200
200
200
200
200
200
200
200
Spread Spectrum Modulation
FOUT
X1
X1
X1
X1
X1
X1
X1
X1
Frequency
Magnitude
鹵0.75%
鹵1.00%
鹵1.25%
鹵0.125%
鹵0.25%
鹵0.50%
鹵0.375%
鹵0.625%
Fin / 1024
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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