ꢀ ꢁꢂ ꢃꢄ ꢅ ꢂꢆ ꢇꢈ ꢉ ꢀ ꢁꢊ ꢃ ꢄꢅꢂ ꢆ ꢇ ꢈ
ꢋꢌ ꢍꢎ ꢏ ꢍ ꢎ ꢁꢈ ꢐꢑ ꢅꢒ ꢓꢁ ꢏꢔ ꢐꢀ
ꢕꢎ ꢏ ꢄ ꢖ ꢌꢀꢏꢈꢏ ꢔ ꢒꢓꢏ ꢗꢓ ꢏ ꢐꢔ ꢘ ꢎꢀ ꢏꢔ ꢐꢀ
SCLS039F − DECEMBER 1982 − REVISED SEPTEMBER 2003
PARAMETER MEASUREMENT INFORMATION
V
CC
PARAMETER
R
C
S1
S2
L
L
50 pF
or
150 pF
S1
S2
t
t
t
t
Open
Closed
PZH
PZL
PHZ
PLZ
Test
Point
t
1 kΩ
en
R
L
Closed
Open
Open
Closed
Open
From Output
Under Test
t
t
1 kΩ
50 pF
C
dis
pd
L
Closed
(see Note A)
50 pF
or
150 pF
or t
−−
Open
Open
t
LOAD CIRCUIT
V
CC
Reference
Input
50%
V
CC
0 V
High-Level
Pulse
50%
50%
50%
t
t
h
su
0 V
V
CC
t
Data
Input
w
90%
90%
50%
10%
50%
10%
V
CC
0 V
Low-Level
Pulse
50%
t
t
f
r
0 V
VOLTAGE WAVEFORMS
SETUP AND HOLD AND INPUT RISE AND FALL TIMES
VOLTAGE WAVEFORMS
PULSE DURATIONS
V
CC
Output
Input
V
CC
50%
50%
Control
(Low-Level
Enabling)
50%
50%
0 V
V
0 V
t
t
PLH
PHL
90%
t
t
PLZ
PZL
OH
In-Phase
Output
90%
≈V
CC
Output
Waveform 1
(See Note B)
≈V
CC
50%
50%
10%
50%
10%
V
OL
10%
t
t
f
r
V
OL
OH
t
t
PLH
PHL
90%
t
t
PZH
PHZ
V
V
OH
90%
Out-of-
Phase
Output
V
50%
10%
50%
10%
Output
Waveform 2
(See Note B)
90%
50%
OL
t
t
≈0 V
f
r
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
NOTES: A.
C includes probe and test-fixture capacitance.
L
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 = 50 Ω, t = 6 ns, t = 6 ns.
O
r
f
D. The outputs are measured one at a time with one input transition per measurement.
E.
F.
G.
t
t
t
and t
and t
and t
are the same as t
.
dis
PLZ
PZL
PLH
PHZ
PZH
PHL
are the same as t
.
en
are the same as t .
pd
Figure 1. Load Circuit and Voltage Waveforms
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
