CY28401
AC Electrical Specifications (continued)
Parameter
VLOW
VOX
Description
Condition
Min.
–150
250
–
Max.
–
Unit
mv
mv
mV
V
Voltage Low
Measured SE
Measured SE
Crossing Point Voltage at 0.7V Swing
Vcross Variation over all edges
Maximum Overshoot Voltage
Minimum Undershoot Voltage
Ring Back Voltage
550
'VOX
140
VOVS
–
VHIGH + 0.3
–0.3
N/A
VUDS
–
V
VRB
0.2
–
V
tPD(PLL)
Input to output skew in PLL mode
Measured at crossing point VOX
250
ps
ns
tPD(NONPLL) Input to output skew in Non–PLL mode Measured at crossing point VOX
2.5
6.5
M e a s u re m e n t
P o in t
T P C B
ꢀ ꢀ :
ꢀ ꢀ :
D IF T
ꢁ ꢂ ꢃꢂ :
ꢁ ꢂ ꢃꢂ :
2 p F
M e a s u re m e n t
P o in t
2 p F
T P C B
D IF C
IR E F
ꢁ ꢄ ꢅ :
T ra c e Im p e d a n c e M e a s u re d D iffe re n tia lly
Figure 8. Differential Clock Termination
Switching Waveforms
TRise (CLOCK)
VOH = 0.525V
VCROSS
VOL = 0.175V
TFall (CLOCK)
Figure 9. Single-Ended Measurement Points for TRise and TFall
Rev 1.0,November 21, 2006
Page 11 of 13
SPECTRALINEAR [ SPECTRALINEAR INC ]
