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Si8440/1/2
Rev. 0.3
7
Timing Characteristics
Maximum Data Rate
0
—
100
Mbps
Minimum Pulse Width
Propagation Delay
1
—
5
—
ns
t
PHL
,t
PLH
PWD
—
7.5
—
ns
Pulse Width Distortion
|t
PLH
-
t
PHL
|
1
Propagation Delay Skew
2
Channel-Channel Skew
3
—
1
—
ns
t
PSK
—
8
—
ns
t
PSKCD/OD
—
1
—
ns
Output Rise Time
C1 = 15 pF
—
2
—
ns
Output Fall Time
C1 = 15 pF
—
2
—
ns
Common Mode Transient
Immunity at Logic Low Output
4
Common Mode Transient
Immunity at Logic High Output
4
Enable to Data Valid
CM
L
25
30
—
kV/μs
CM
H
25
30
—
kV/μs
t
en1
t
en2
t
SU
—
5
—
ns
Enable to Data Tri-State
Start-up Time
5
—
5
—
ns
—
3
—
μs
Notes:
1.
t
PHL
propagation delay is measured from the 50% level of the falling edge of the V
Ix
signal to the 50% level of the falling
edge of the V
Ox
signal. t
PLH
propagation delay is measured from the 50% level of the rising edge of the V
Ix
signal to the
50% level of the rising edge of the V
Ox
signal.
2.
t
PSK
is the magnitude of the worst-case difference in t
PHL
or t
PLH
that is measured between units at the same operating
temperature, supply voltages, and output load within the recommended operating conditions.
3.
Codirectional channel-to-channel matching is the absolute value of the difference in propagation delays between any
two channels with inputs on the same side of the isolation barrier. Opposing-directional channel-to-channel matching is
the absolute value of the difference in propagation delays between any two channels with inputs on opposing sides of
the isolation barrier.
4.
CM
H
is the maximum common-mode voltage slew rate that can be sustained while maintaining V
O
> 0.8 V
DD2
. CM
L
is
the maximum common-mode voltage slew rate that can be sustained while maintaining V
O
< 0.8 V. The common-mode
voltage slew rates apply to both rising and falling common-mode voltage edges. The transient magnitude is the range
over which the common mode is slewed.
5.
Start-up time is the time period from the application of power to valid data at the output.
Table 2. Electrical Characteristics (Continued)
(V
DD1
= 3.3 V, V
DD2
= 3.3 V, T
A
= –40 to 125 C°)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit