74F138SJX Fairchild Semiconductor, 74F138SJX Datasheet - Page 2

• 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

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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