74VHC139 STMicroelectronics, 74VHC139 Datasheet - Page 2

• Manufacturer Part Number: 74VHC139
• Description: DUAL 2 TO 4 DECODER/DEMULTIPLEXER
• Manufacturer: STMicroelectronics

74VHC138
INPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X:Don’t Care
LOGIC DIAGRAM
Thislogic diagram has notbe used to estimate propagation delays
2/8
G2B
H
X
X
L
L
L
L
L
L
L
L
ENABL E
G2A
X
H
X
L
L
L
L
L
L
L
L
G 1
H
H
H
H
H
H
H
H
L
X
X
INPUT S
C
X
X
X
H
H
H
H
L
L
L
L
SELECT
B
X
X
X
H
H
H
H
L
L
L
L
A
X
X
X
H
H
H
H
L
L
L
L
Y0
H
H
H
H
H
H
H
H
H
H
L
PIN DESCRIPTION
Y1
H
H
H
H
H
H
H
H
H
H
L
15, 14, 13,
12, 11, 10,
PIN No
1, 2, 3
4, 5
9, 7
16
6
8
Y2
H
H
H
H
H
H
H
H
H
H
L
SYMBOL
G2A, G2B
Y0 to Y7
OUTPUTS
A, B, C
Y3
H
H
H
H
H
H
H
H
H
H
L
GND
V
G1
CC
Y4
H
H
H
H
H
H
H
H
H
H
L
Address Inputs
Enable Inputs
Enable Input
Outputs
Ground (0V)
Positive Supply Voltage
NAME AND FUNCT ION
Y5
H
H
H
H
H
H
H
H
H
H
L
Y6
H
H
H
H
H
H
H
H
H
H
L
Y7
H
H
H
H
H
H
H
H
H
H
L