MC74LCX541
2.7 V
Dn
1.5 V
1.5 V
0V
t
PLH
1.5 V
t
PHL
V
OH
On
1.5 V
V
OL
WAVEFORM 1 - PROPAGATION DELAYS
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns
2.7 V
OEn
1.5 V
0V
t
PZH
1.5 V
≈
0V
t
PZL
t
PLZ
≈
3.0 V
t
PHZ
V
CC
V
OH
- 0.3 V
On
On
1.5 V
V
OL
+ 0.3 V
GND
WAVEFORM 2 - OUTPUT ENABLE AND DISABLE TIMES
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns
Figure 3. AC Waveforms
V
CC
6V
OPEN
GND
PULSE
GENERATOR
R
T
R
1
DUT
C
L
R
L
Test
t
PLH
, t
PHL
t
PZL
, t
PLZ
Open Collector/Drain t
PLH
and t
PHL
t
PZH
, t
PHZ
Switch
Open
6V
6V
GND
C
L
= 50 pF or equivalent (Includes jig and probe capacitance)
R
L
= R
1
= 500
W
or equivalent
R
T
= Z
OUT
of pulse generator (typically 50
W)
Figure 4. Test Circuit
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