NB3L202K
www.onsemi.com
12
TPeriod
High Duty Cycle% Low Duty Cycle%
Skew measurement point
0.000 V
Figure 15. Differential (CLOCK – CLOCK#) Measurement Points (Tperiod, Duty Cycle)
Crossing Point (mV)
V
high
Average (mV)
Equ 1: V
cross(rel)
Max = 0.550 − 0.5(0.7 − V
high avg
)
Equ 2: V
cross(rel)
Min = 0.250 + 0.5(V
high avg
− 0.7)
ForVhigh< 700mV
Use Equ.1
ForVhigh> 700mV
Use Equ.2
Figure 16. V
cross
Range Clarification (Note 40)
40.The picture above illustrates the effect of V
high
above and below 700 mV on the V
cross
range. The purpose of this is to prevent a 250 mV
V
cross
with an 850 mV V
high
. In addition, this prevents the case of a 550 mV V
cross
with a 660 mV V
high
. The actual specification for V
cross
is dependent upon the measured amplitude of V
high
.
V
cross(rel)
Max
V
cross(rel)
Min
550
500
450
400
350
300
250
200
625 650 675 700 725 750 775 800 825 850
