74F138SJX Fairchild Semiconductor, 74F138SJX Datasheet - Page 2
![DECODER/DEMUX 1-OF-8 16SOP](/photos/6/56/65606/16-sop_pkg_sml.jpg)
74F138SJX
Manufacturer Part Number
74F138SJX
Description
DECODER/DEMUX 1-OF-8 16SOP
Manufacturer
Fairchild Semiconductor
Series
74Fr
Type
Decoder/Demultiplexerr
Specifications of 74F138SJX
Circuit
1 x 3:8
Independent Circuits
1
Current - Output High, Low
1mA, 20mA
Voltage Supply Source
Single Supply
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (5.3mm Width), 16-SO, 16-SOEIIJ
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
74F138SJX
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
www.fairchildsemi.com
Unit Loading/Fan Out
Truth Table
H
L
X
Functional Description
The
accepts three binary weighted inputs (A
when enabled, provides eight mutually exclusive active
LOW outputs (O
inputs, two active LOW (E
All outputs will be HIGH unless E
is HIGH. This multiple enable function allows easy parallel
LOW Voltage Level
HIGH Voltage Level
Immaterial
F138
A
E
E
O
0
1
3
0
E
H
X
X
–A
, E
L
L
L
L
L
L
L
L
–O
1
Pin Names
2
2
7
high-speed
0
E
X
H
X
L
L
L
L
L
L
L
L
–O
2
7
). The F138 features three Enable
E
X
X
H
H
H
H
H
H
H
H
L
1,
3
Inputs
Address Inputs
Enable Inputs (Active LOW)
Enable Input (Active HIGH)
Outputs (Active LOW)
1-of-8
E
2
) and one active HIGH (E
A
1
X
X
X
H
H
H
H
L
L
L
L
0
and E
decoder/demultiplexer
FIGURE 1. Expansion to 1-of-32 Decoding
2
A
X
X
X
H
H
H
H
L
L
L
L
are LOW and E
1
0,
A
Description
1,
A
X
X
X
H
H
H
H
L
L
L
L
A
2
2
) and,
O
3
H
H
H
H
H
H
H
H
H
H
L
).
3
0
2
expansion of the device to a 1-of-32 (5 lines to 32 lines)
decoder with just four F138 devices and one inverter (See
Figure 1). The F138 can be used as an 8-output demulti-
plexer by using one of the active LOW Enable inputs as the
data input and the other Enable inputs as strobes. The
Enable inputs which are not used must be permanently tied
to their appropriate active HIGH or active LOW state.
O
H
H
H
H
H
H
H
H
H
H
L
1
O
H
H
H
H
H
H
H
H
H
H
L
2
O
HIGH/LOW
Outputs
H
H
H
H
H
H
H
H
H
H
L
3
50/33.3
1.0/1.0
1.0/1.0
1.0/1.0
U.L.
O
H
H
H
H
H
H
H
H
H
H
L
4
O
H
H
H
H
H
H
H
H
H
H
L
5
Output I
20 A/ 0.6 mA
20 A/ 0.6 mA
20 A/ 0.6 mA
Input I
1 mA/20 mA
O
H
H
H
H
H
H
H
H
H
H
L
6
IH
OH
/I
/I
IL
O
OL
H
H
H
H
H
H
H
H
H
H
L
7