Electrical characteristics, Switching characteristics – Diodes 74AHC138 User Manual
Page 5
74AHC138
Document number: DS35482 Rev. 2 - 2
5 of 10
June 2013
© Diodes Incorporated
Preliminary
74AHC138
Electrical Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Symbol Parameter Test
Conditions Vcc
T
A
= +25°C
-40°C to +85°C
-40°C to +125°C
Unit
Min Typ Max Min Max Min Max
V
IH
High-level Input
Voltage
2.0V
1.5
1.5
1.5
V
3.0V
2.1
2.1
2.1
5.5V
3.85
3.85
3.85
V
IL
Low-level input
voltage
2.0V
0.5
0.5
0.5
V
3.0V
0.9
0.9
0.9
5.5V
1.65
1.65
1.65
V
OH
High Level
Output Voltage
I
OH
= -50 μA
2.0V
1.9 2.0
1.9
1.9
V
I
OH
= -50 μA
3.0V 2.9
3.0
2.9
2.9
I
OH
= -50 μA
4.5V 4.4
4.5
4.4
4.4
I
OH
= -4 mA
3.0V
2.58
2.48
2.40
I
OH
= -8 mA
4.5V 3.94
3.80
3.70
V
OL
Low-level Output
Voltage
I
OL
= 50 μA
2.0V
0.1
0.1
0.1
V
I
OL
= 50 μA
3.0V
0.1
0.1
0.1
I
OL
= 50 μA
4.5V
0.1
0.1
0.1
I
OL
= 4 mA
3.0V
0.36
0.44
0.55
I
OL
= 8 mA
4.5V
0.36
0.44
0.55
I
I
Input Current
V
I
=GND or 5.5 V
5.5V
0.1
± 1
± 2
μA
I
CC
Supply Current
V
I
= GND or V
CC
I
O
=0 A
5.5V
4.0
40
80
μA
C
i
Input
Capacitance
V
i
= V
CC
or GND
5.5V
4.0 10
10
10 pF
Switching Characteristics
Symbol
Parameter
Test
Conditions
Vcc
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
=15 pF
3.0
V
to
3.6V 0.5 4.4 8.0 0.5 9.5 0.5 11.5
ns
4.5
V
to
5.5
V 0.5 3.0 5.5 0.5 6.5 0.5 7.0
Figure 2
C
L
=50pF
3.0 V to 3.6V
0.5
6.2
11.5
0.5
13.0
0.5
14.5
4.5
V
to
5.5
V 0.5 4.3 7.5 0.5 8.5 0.5 9.5
Propagation
Delay E3 to Yn
Figure 2
C
L
=15 pF
3.0
V
to
3.6V 0.5 4.7 8.0 0.5 9.5 0.5 11.5
ns
4.5
V
to
5.5
V 0.5 3.3 5.1 0.5 6.0 0.5 7.5
Figure 2
C
L
=50pF
3.0 V to 3.6V
0.5
6.8
11.5
0.5
13.0
0.5
14.5
4.5
V
to
5.5
V 0.5 4.7 7.1 0.5 8.0 0.5 9.0
Propagation
Delay En to Yn
Figure 2
C
L
=15 pF
3.0 V to 3.6V
0.5
6.7
9.7
0.5
11.5
0.5
12.5
ns
4.5
V
to
5.5
V 0.5 4.8 6.8 0.5 8.0 0.5 8.5
Figure 2
C
L
=50pF
3.0 V to 3.6V
0.5
9.6
13.2
0.5
15.0
0.5
16.5
4.5 V to 5.5 V
0.5
6.8
8.8
0.5
10.0
0.5
11.0