Switching characteristics, Operating characteristics, Parameter measurement information – Diodes 74AHCT138 User Manual
Page 5
74AHCT138
Document number: DS35483 Rev. 2 - 2
5 of 9
June 2013
© Diodes Incorporated
74AHCT138
Switching Characteristics
Symbol
Parameter
Test Conditions
V
CC
T
A
= +25°C
-40°C to +85°C
-40°C to +125°C
Unit
Min Typ Max Min
Max Min Max
t
PD
Propagation Delay
An to Yn
Figure 2 C
L
=15pF
4.5V to 5.5V
0.5
4.4
10.4
1.0
12.0
1.0
13.0
ns
Figure 2 C
L
= 50pF
4.5V to 5.5V
0.5
6.2
11.4
1.0
13.0
1.0
14.5
Propagation Delay
E3 to Yn
Figure 2 C
L
= 15pF
4.5V to 5.5V
0.5
4.3
9.1
1.0
10.5
1.0
11.5
ns
Figure 2 C
L
= 50pF
4.5V to 5.5V
0.5
6.2
10.1
1.0
11.5
1.0
13.0
Propagation Delay
En to Yn
Figure 2 C
L
= 15pF
4.5V to 5.5V
0.5
4.3
9.6
1.0
11.0
1.0
12.0
ns
Figure 2 C
L
= 50pF
4.5V to 5.5V
0.5
6.2
10.6
1.0
12.0
1.0
13.5
Operating Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Parameter
Test
Conditions
V
CC
= 5V
Unit
Typ
C
pd
Power dissipation
capacitance
f = 1 MHz all outputs switching-no load
23
pF
Parameter Measurement Information
V
CC
Inputs
V
M
C
L
V
I
t
r
/t
f
Input Output
4.5V to 5.5V
3.0 V
3ns
1.5 V
V
CC
/2
15pF, 50pF
Voltage Waveform
Pulse Duration
Voltage Waveform
Propagation Delay Times
Inverting and Non Inverting Outputs
Notes: A. Includes test lead and test apparatus capacitance.
B. All pulses are supplied at pulse repetition rate
≤ 10 MHz.
C. Inputs are measured separately one transition per measurement.
D. t
PLH
and t
PHL
are the same as t
PD
.