ABE0113 Datasheet, PDF (1/5 Pages) Abracon Corporation – Low EMI Spread Spectrum Multiplier Clock

ABE0113
Low EMI Spread Spectrum Multiplier Clock
FEATURES
• Spread Spectrum Clock Generator with selectable
multiplier ( 1x, 2x and 4x ).
• Output frequency ranges: 24MHz to 240MHz.
• Selectable Down Spread Modulation.
• TTL/CMOS compatible outputs.
• 3.3V Operating Voltage.
• Low short term jitter.
• Available in 8-Pin 150mil SOIC.
DESCRIPTION
The ABE0113 is a Spread Spectrum Clock Generator
designed for the purpose of reducing EMI in high-
speed digital systems. The selectable Down Spread
modulation magnitude (see table below) permits EMI
reduction without over-clocking the output. The
device operates over a very wide range of input
frequencies and provides 1x to 4x modulated clock
outputs.
PIN CONFIGURATION
FIN 1
S2^ 2
S1^ 3
S0^v 4
8
VD
D
7 S3^v
6 FOUT
5 GND
FIN = 24 ~ 120 Mhz
Note: v: 30kΩ Internal Pull down ^: 30kΩ Internal Pull up.
OUTPUT CLOCK (FOUT) SELECTION
S3
S2
S1
S0
FIN Range
(MHz)
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
24 - 60
24 - 60
24 - 60
24 - 60
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
24 - 60
24 - 60
24 - 60
24 - 60
24 - 60
24 - 60
1
0
1
0
1
0
1
1
24 - 60
24 - 60
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
60 - 120
60 - 120
60 - 120
60 - 120
FOUT
X1
X1
X1
X1
X2
X2
X2
X2
X2
X2
X4
X4
X1
X1
X1
X1
Spread Spectrum Modulation
Frequency
Magnitude
-1.5%
-2.0%
-2.5%
-3.0%
-0.5%
-1.0%
-1.5%
Fin / 1024
-2.0%
-2.5%
-3.0%
-0.5%
-1.0%
-0.5%
-1.0%
-1.5%
-2.0%
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: [phone] www.Abracon.com 03/21/05 Page 1