74VHC138N 查看數據表（PDF） - Fairchild Semiconductor

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74VHC138N

3-to-8 Decoder/Demultiplexer

Fairchild Semiconductor 

Truth Table

Inputs

Outputs

E1 E2 E3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7

HX X X X X HHHHHHHH

X HX X X X HHHHHHHH

XX L XXXHHHHHHHH

L

L

H

L

L

L

L

HH

H

H

H

H

H

L

L

H

H

L

L

H

L

H

H

H

H

H

H

L

L

H

L

H

L

HH

L

H

H

H

H

H

L

L

H

H

H

L

HHH

L

H

H

H

H

L

L

H

L

L

H

HHH

H

L

H

H

H

L

L

H

H

L

H

HHH

H

H

L

H

H

L

L

H

L

H

H

HHH

H

H

H

L

H

L

L

H

H

H

H

HHH

H

H

H

H

L

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

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