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Renesas Electronics Components Datasheet

HD74LS138P Datasheet

3-Line-to-8-Line Decoders/Demultiplexers

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HD74LS138
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3-Line-to-8-Line Decoders / Demultiplexers
REJ03D0434–0300
Rev.3.00
Jul.13.2005
The HD74LS138 decodes one-of-eight line dependent on the conditions at the three binaly select inputs and the three
enable inputs. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when
expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one
inverter. An enable input can be used as a data input for demultiplexing applications.
Features
Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74LS138P
DILP-16 pin
PRDP0016AE-B
(DP-16FV)
P
HD74LS138FPEL SOP-16 pin (JEITA)
PRSP0016DH-B
FP
(FP-16DAV)
HD74LS138RPEL SOP-16 pin (JEDEC)
PRSP0016DG-A
(FP-16DNV)
RP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
-
EL (2,000 pcs/reel)
EL (2,500 pcs/reel)
Pin Arrangement
Select
Inputs
A1
B2
C3
G2A 4
Enable G2B 5
Inputs
G1 6
Outputs Y7 7
GND 8
A
B
Y0
C
Y1
G2A
Y2
G2B
Y3
G1
Y4
Y7
Y5
Y6
16 VCC
15 Y0
14 Y1
13 Y2
12 Y3 Outputs
11 Y4
10 Y5
9 Y6
(Top view)
Rev.3.00, Jul.13.2005, page 1 of 7


Renesas Electronics Components Datasheet

HD74LS138P Datasheet

3-Line-to-8-Line Decoders/Demultiplexers

No Preview Available !

HD74LS138
Function Table
Inputs
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Select
Outputs
G1
G2*
C
B
A
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
H
X
X
X
H
H
H
H
H
H
H
H
L
X
X
X
X
H
H
H
H
H
H
H
H
H
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
H
H
L
H
H
H
H
H
H
H
L
L
H
L
H
H
L
H
H
H
H
H
H
L
L
H
H
H
H
H
L
H
H
H
H
H
L
H
L
L
H
H
H
H
L
H
H
H
H
L
H
L
H
H
H
H
H
H
L
H
H
H
L
H
H
L
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H ; high level, L ; low level, X ; irrelevant
* ; G2 = G2A + G2B
Block Diagram
G1
Enable
Inputs G2A
G2B
A
Select
Inputs
B
C
Y0
Y1
Y2
Y3
Data
Outputs
Y4
Y5
Y6
Y7
Absolute Maximum Ratings
Item
Symbol
Ratings
Supply voltage
VCC
7
Input voltage
VIN
7
Power dissipation
PT
400
Storage temperature
Tstg
–65 to +150
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Symbol
VCC
IOH
IOL
Topr
Min
4.75
–20
Typ
5.00
25
Max
5.25
–400
8
75
Unit
V
V
mW
°C
Unit
V
µA
mA
°C
Rev.3.00, Jul.13.2005, page 2 of 7


Part Number HD74LS138P
Description 3-Line-to-8-Line Decoders/Demultiplexers
Maker Renesas Technology
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HD74LS138P Datasheet PDF






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