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ABE0121 Datasheet, PDF (1/4 Pages) Abracon Corporation – Low EMI Spread Spectrum Multiplier Clock | |||
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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: 30k⦠Internal Pull down. ^: 30k⦠Internal 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=â1â
MODULATION MAGNITUDE SELECTION
S2
S1
S0
FIN Range
(MHz)
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
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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