SCLS078E – DECEMBER 1982 – REVISED OCTOBER 2010
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PARAMETER MEASURMENT INFORMATION
From Output
Under Test
Test
Point
C
L
= 50 pF
(see Note A)
In-Phase
Output
V
CC
50%
10%
t
f
0V
Out-of-Phase
Output
Input
V
CC
50%
50%
0V
t
PLH
50%
10%
t
PHL
90%
50%
10%
t
f
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
90%
t
r
t
PLH
50%
10%
90%
t
r
V
OH
V
OL
t
PHL
90%
V
OH
50%
10%
t
f
V
OL
LOAD CIRCUIT
Input
50%
10%
90%
90%
t
r
VOLTAGE WAVEFORMS
INPUT RISE AND FALL TIMES
NOTES: A. C
L
includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR
≤
1 MHz, Z
O
= 50 , t
r
= 6 ns, t
f
= 6 ns.
C. The outputs are measured one at a time with one input transition per measurement.
D. t
PLH
and t
PHL
are the same as t
pd
.
Figure 1. Load Circuit and Voltage Waveforms
4
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