
IDT / ICS PCI EXPRESS/JITTER ATTENUATOR
5
ICS874002AG REV. A DECEMBER 6, 2006
ICS874002
PCI EXPRESS/JITTER ATTENUATOR
PARAMETER MEASUREMENT INFORMATION
OUTPUT SKEW
DIFFERENTIAL INPUT LEVEL
3.3V LVDS OUTPUT LOAD AC TEST CIRCUIT
CYCLE-TO-CYCLE JITTER
V
CMR
Cross Points
V
PP
GND
CLK,
FB_IN
nCLK,
nFB_IN
V
DD
t
PW
t
PERIOD
t
PW
t
PERIOD
odc =
x 100%
QA0, QA1
nQA0, nQA1
tcycle n
tcycle n+1
tjit(cc) = tcycle n – tcycle n+1
1000 Cycles
QA0, QA1
nQA0, nQA1
tcycle n
tcycle n+1
SCOPE
Qx
nQx
3.3V±5%
POWER SUPPLY
+–
Float GND
LVDS
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
OUTPUT RISE/FALL TIME
V
DD,
V
DDO
V
DDA
tsk(o)
nQx
nQy
Qx
Qy
t()
V
OH
V
OL
V
OH
V
OL
(where
t() is any random sample, and t() mean is the average
of the sampled cycles measured on controlled edges)
t() mean = Static Phase Offset
nCLK
FB_IN
CLK
nFB_IN