MC74LCX138_05 Datasheet, PDF (2/8 Pages) ON Semiconductor – Low-Voltage CMOS 3-to-8 Decoder/Demultiplexer With 5 V−Tolerant Inputs

V_CC O0 O1 O2 O3 O4 O5 O6
16 15 14 13 12 11 10 9
MC74LCX138
A2 A1
A0
3
2
1
E1 E2 E3
456
1 2 3 4 5 6 78
A0 A1 A2 E1 E2 E3 O7 GND
Figure 1. Pinout: 16−Lead (Top View)
PIN NAMES
Pins
A0−A2
E1−E2
E3
O0−O7
Function
Address Inputs
Enable Inputs
Enable Input
Outputs
7
9
1
1
12
13
1
1
O7
O6
O50
O41
O3
O2
O14
O05
Figure 2. Logic Diagram
TRUTH TABLE
Inputs
Outputs
E1
E2
E3
A0
A1
A2
O0
O1
O2
O3
O4
O5
O6
O7
H
X
X
X
X
X
H
H
H
H
H
H
H
H
X
H
X
X
X
X
H
H
H
H
H
H
H
H
X
X
L
X
X
X
H
H
H
H
H
H
H
H
L
L
H
L
L
L
L
H
H
H
H
H
H
H
L
L
H
H
L
L
H
L
H
H
H
H
H
H
L
L
H
L
H
L
H
H
L
H
H
H
H
H
L
L
H
H
H
L
H
H
H
L
H
H
H
H
L
L
H
L
L
H
H
H
H
H
L
H
H
H
L
L
H
H
L
H
H
H
H
H
H
L
H
H
L
L
H
L
H
H
H
H
H
H
H
H
L
H
L
L
H
H
H
H
H
H
H
H
H
H
H
L
H = High Voltage Level
L = Low Voltage Level
X = High or Low Voltage Level and Transitions are Acceptable
For I_CC reasons, DO NOT FLOAT Inputs
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