Datasheet
SCLS543A − SEPTEMBER 2002 − REVISED APRIL 2008
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
50%50%
10%10%
90% 90%
V
CC
0 V
t
r
t
f
Input
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
50%
50%50%
10%10%
90% 90%
V
CC
V
OH
V
OL
0 V
t
r
t
f
Input
In-Phase
Output
50%
t
PLH
t
PHL
50% 50%
10% 10%
90%90%
V
OH
V
OL
t
r
t
f
t
PHL
t
PLH
Out-of-Phase
Output
50%
10%
90%
V
CC
≈V
CC
V
OL
0 V
Output
Control
(Low-Level
Enabling)
Output
Waveform 1
(See Note B)
50%
t
PZL
t
PLZ
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
V
OH
≈0 V
50%
50%
t
PZH
t
PHZ
Output
Waveform 2
(See Note B)
≈ V
CC
Test
Point
From Output
Under Test
C
L
(see Note A)
R
L
V
CC
S1
S2
LOAD CIRCUIT
PARAMETER C
L
t
PZH
t
pd
or t
t
t
dis
t
en
t
PZL
t
PHZ
t
PLZ
1 kΩ
1 kΩ
50 pF
50 pF
Open Closed
R
L
S1
Closed Open
S2
Open Closed
Closed Open
50 pF
Open Open−−
NOTES: A. C
L
includes probe and test-fixture capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, Z
O
= 50 Ω, t
r
= 6 ns, t
f
= 6 ns.
D. The outputs are measured one at a time with one input transition per measurement.
E. t
PLZ
and t
PHZ
are the same as t
dis
.
F. t
PZL
and t
PZH
are the same as t
en
.
G. t
PLH
and t
PHL
are the same as t
pd
.
Figure 1. Load Circuit and Voltage Waveforms