Specifications

E PENTIUM® PRO PROCESSOR AT 150, 166, 180, and 200 MHz
41
It is expected that the larger the overshoot α, the
smaller the amount of time, τ, needed to maintain
setup time to within +0.05 ns of the nominal value.
For a given value of α, it is likely that τ will be the
longest for the slowest input edge rate of 0.3 V/ns.
Furthermore, there may be some dependence
between τ and lower starting voltages than V
REF –
0.2 V (for Lo-to-Hi transitions) for the reason
described later in Section 4.2.3.2. Minimum Set-up
and Hold Times.
V
REF
+ 0.2
V
REF
− 0.2
Time
V
REF
Clock
1.5 V Clk Ref
V
start
δ
φ
τ
0
.
8
V
/
n
s
0
.
3
V
/
n
s
ρ
α
10 ps rise/fall Edges
T
su
+0.05ns
Figure 24. Standard Input Lo-to-Hi Waveform for Characterizing Receiver Ringback Tolerance