ICS840021I Datasheet, PDF (5/11 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS840021I
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
TYPICAL PHASE NOISE AT 125MHZ (3.3V OR 2.5V)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
100
Gigabit Ethernet Filter
125MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz (3.3V) = 0.48ps (typical)
1.875MHz to 20MHz (2.5V) = 0.50ps (typical)
Raw Phase Noise Data
Phase Noise Result by adding
Gigabit Ethernet Filter to raw data
1k
10k
100k
1M
10M
100M
OFFSET FREQUENCY (HZ)
840021AGI
www.icst.com/products/hiperclocks.html
5
REV. A MAY 19, 2005