May 2008
rev 0.1
Device - Device Skew
PCS3P625Z05B/C
PCS3P625Z09B/C
V
DD
/2
CLKOUT, Device 1
V
DD
/2
CLKOUT, Device 2
t7
Input-Output Skew
Test Circuit
+3.3V
Input
Timing-Safe™
Output
0.1uF
+3.3V
T
SKEW
-
T
SKEW
+
V
DD
0.1uF
One clock cycle
N=1
when spread spectrum is ON
For example,
T
SKEW
= ± 0.125 for an
Input clock12MHz, translates in to
(1/12MHz) * 0.125=10.41nS
V
DD
OUTPUT
CLKOUT
LOAD
GND
T
SKEW
represents input-output skew
A Typical example of Timing-Safe™ waveform
Input
Input
CLKOUT with SSOFF
Timing-Safe™ CLKOUT
High Frequency Timing-Safe™ Peak EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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