74HCT138 Datasheet, PDF (5/10 Pages) Diodes Incorporated – 3 TO 8 LINE DECODER DEMULTIPLEXER

74HCT138
Electrical Characteristics (@T_A = +25°C, unless otherwise specified.)
Symbol Parameter Test Conditions
TA = 25°C
Vcc
Min Typ Max
VIH
High-level
Input Voltage ^
4.5V to 5.5V 2.0 1.6 
VIL
Low-level
input voltage ^
4.5V to 5.5V  1.2 0.8
High Level
VOH Output
Voltage
IOH = -20 μA
IOH = -4 mA
4.5V
4.5V
4.4 4.5 
3.98 ^4.32 
Low-level
VOL Output
Voltage
IOL = 20 μA
IOL = 4 mA
4.5V
4.5V

0 0.1
 0.15 _0.26
II
Input Current
VI =GND to
5.5 V
5.5V

 ±0.1
ICC
Supply
Current
VI = GND or VCC
IO=0
5.5V

Test Per PINS

Pin
An
Additional
∆ICC Supply
Current
VI =
PIN En

Vcc -2.1 V
4.5V to 5.5V
Other
VI = Vcc PIN E3

or GND
IO=0
Ci
Input
Capacitance
Vi = VCC or GND
5.5V

 8.0
150 540
125 450
100 360
4 10
-40°C to 85°C
Min
Max
2.0


0.8
4.4

3.85


0.1

0.33

±1

80

675

563

450

10
-40°C to 125°C
Unit
Min
Max
2.0

V

0.8
V
4.4

3.7

V

0.1
V

0.4

± 1 μA

160 μA

735
μA

613

490 μA

10
pF
Switching Characteristics
Symbol /
Parameter
t_PLH,
t_PLH
Propagation
Delay
t_TLH,
t_THL
Transition
Time
Pins
Test
Conditions
An to Yn
Figure 2
E3 to Yn
Figure 2
En to Yn
Figure 2
Yn
Figure 2
Vcc
4.5V
5.0V
4.5V
5.0V
4.5V
5.0V
4.5 V
T_A=25°C
Min Typ. Max

20
35

17


18
40

19


19
40

19

-40°C to 85°C -40°C to 125°C
Unit
Min Max Min Max

35

45





40

45
ns





40

45





7
15

15

110
ns
74HCT138
Document number: DS35489 Rev. 3 - 2
5 of 10
www.diodes.com
June 2013
© Diodes Incorporated