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PDF HD74HC138 Data sheet ( Hoja de datos )

Número de pieza HD74HC138
Descripción 3-to-8-line Decoder/Demultiplexer
Fabricantes Hitachi Semiconductor　
Logotipo Hitachi Semiconductor Logotipo



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No Preview Available ! HD74HC138 Hoja de datos, Descripción, Manual

HD74HC138
3-to-8-line Decoder/Demultiplexer
Description
The HD74HC138 has 3 binary select inputs (A, B and C). If the device is enabled these inputs determine
which one of the eight normally high outputs will go low. Two active low and one active high enables (G1,
G2A and G2B) are provided to ease the cascading of decoders.
Features
• High Speed Operation: tpd (A, B, C to Y) = 16.5 ns typ (CL = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 V to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Inputs
Enable
Select
Outputs
G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
XX H X X X H H H H H H H H
XH X X X X H H H H H H H H
LX X X X X H H H H H H H H
HL L L L L L H H H H H H H
HL L L L H H L H H H H H H
HL L L H L H H L H H H H H
HL L L H H H H H L H H H H
HL L H L L H H H H L H H H
HL L H L H H H H H H L H H
HL L H H L H H H H H H L H
HL L H H H H H H H H H H L

1 page




HD74HC138 pdf
19.20
20.00 Max
16
9
1
1.3
1.11 Max
8
Unit: mm
7.62
2.54 ± 0.25
0.48 ± 0.10
0.25
+
–
0.13
0.05
0° – 15°
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
DP-16
Conforms
Conforms
1.07 g

5 Page










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