74AC139PC Fairchild Semiconductor, 74AC139PC Datasheet - Page 2

• Manufacturer Part Number: 74AC139PC
• Description: IC DECODER/DEMUX DUAL 1OF4 16DIP
• Manufacturer: Fairchild Semiconductor
• Series: 74ACr
• Type: Decoder/Demultiplexerr

Specifications of 74AC139PC

• Circuit: 1 x 2:4
• Independent Circuits: 2
• Current - Output High, Low: 24mA, 24mA
• Voltage Supply Source: Single Supply
• Voltage - Supply: 2 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Product: Decoders, Encoders, Multiplexers & Demultiplexers
• Logic Family: 74AC
• Number Of Lines (input / Output): 1.0 / 4.0
• Supply Voltage (max): 6 V
• Supply Voltage (min): 2 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: Through Hole
• Number Of Input Lines: 1.0
• Number Of Output Lines: 4.0
• Logical Function: Decoder/Demux
• Number Of Elements: 2
• Polarity: Inverting
• Number Of Inputs: 2
• Number Of Outputs: 4
• Output Type: Standard
• Propagation Delay Time: 13ns
• Package Type: PDIP
• High Level Output Current: -24mA
• Low Level Output Current: 24mA
• Operating Supply Voltage (typ): 2.5/3.3/5V
• Operating Supply Voltage (max): 6V
• Operating Supply Voltage (min): 2V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 16
• Quiescent Current: 4uA
• Technology: CMOS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 74AC139

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Logic Symbols
Truth Table
H
L
X
HIGH Voltage Level
LOW Voltage Level
E
H
Immaterial
L
L
L
L
Inputs
A
H
H
X
L
L
0
A
H
H
X
L
L
1
IEEE/IEC
O
H
H
H
H
L
0
O
H
H
H
H
L
Outputs
1
O
H
H
H
H
L
2
O
H
H
H
H
L
3
2
Functional Description
The AC/ACT139 is a high-speed dual 1-of-4 decoder/
demultiplexer. The device has two independent decoders,
each of which accepts two binary weighted inputs (A
and provides four mutually exclusive active-LOW outputs
(O
When E is HIGH all outputs are forced HIGH. The enable
can be used as the data input for a 4-output demultiplexer
application. Each half of the AC/ACT139 generates all four
minterms of two variables. These four minterms are useful
in some applications, replacing multiple gate functions as
shown in Figure 1, and thereby reducing the number of
packages required in a logic network.
Logic Diagram
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
0
–O
3
). Each decoder has an active-LOW enable (E).
FIGURE 1. Gate Functions (Each Half)
0
–A
1
)