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MC74AC139D View Datasheet(PDF) - Motorola => Freescale

Part Name
Description
View to exact match
MC74AC139D
Motorola
Motorola => Freescale Motorola
MC74AC139D Datasheet PDF : 6 Pages
1 2 3 4 5 6
MC74AC139 MC74ACT139
LOGIC DIAGRAM
Ea
A0a A1a
Eb
A0b A1b
00a
01a
02a
03a
00b
01b
02b
03b
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
FUNCTIONAL DESCRIPTION
The MC74AC139/74ACT139 is a high-speed dual 1-of-4
decoder/demultiplexer. The device has two independent
decoders, each of which accepts two binary weighted inputs
(A0–A1) and provides four mutually exclusive active-LOW
outputs (O0–O3). Each decoder has an active-LOW enable
(E). 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 MC74AC139/74ACT139
generates all four minterms of two variables. These four
minterms are useful in some applications, replacing multiple
gate functions as shown in Figure a, and thereby reducing the
number of packages required in a logic network.
E
E
A0
O0 A0
O0
A1
A1
E
E
A0
O1
A0
O1
A1
A1
E
E
A0
O2 A0
O2
A1
A1
E
E
A0
O3 A0
O3
A1
A1
Figure a: Gate Functions (each half)
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
Vin
Vout
Iin
Iout
ICC
Tstg
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC VCC or GND Current per Output Pin
Storage Temperature
–0.5 to +7.0
V
–0.5 to VCC +0.5
V
–0.5 to VCC +0.5
V
±20
mA
±50
mA
±50
mA
–65 to +150
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
FACT DATA
5-2
 

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