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PDF IN74HC139A Data sheet ( Hoja de datos )

Número de pieza IN74HC139A
Descripción Dual 1-of-4 Decoder/Demultiplexer High-Performance Silicon-Gate CMOS
Fabricantes ETC 
Logotipo ETC Logotipo



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TECHNICAL DATA
Dual 1-of-4 Decoder/Demultiplexer
High-Performance Silicon-Gate CMOS
IN74HC139A
The IN74HC139A is identical in pinout to the LS/ALS139. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
This device consists of two independent 1-of-4 decoders, each of
which decodes a two-bit Address to one-of-four active-low outputs.
Active-low Selects are provided to facilitate the demultiplexing and
cascading functions. The demultiplexing function is accomplished by
using the Address inputs to select the desired device output, and
utilizing the Select as a data input.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0 µA
High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION
IN74HC139AN Plastic
IN74HC139AD SOIC
TA = -55° to 125° C for all packages
LOGIC DIAGRAM
PIN ASSIGNMENT
PIN 16 =VCC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
Select A1 A0 Y0 Y1 Y2 Y3
H X X HH H H
L L L LH H H
L L HHL H H
L H L HH L H
L H H HH H L
X = don’t care
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IN74HC139A pdf
IN74HC139A
Figure 3. Test Circuit
EXPANDED LOGIC DIAGRAM
(1/2 of Device)
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