MC74VHC138 Datasheet, PDF (2/8 Pages) Motorola, Inc – 3-to-8 Line Decoder

MC74VHC138
PIN ASSIGNMENT
A0 1
A1 ²
A2 ³
E1 4
E2 ⁵
E3 ⁶
Y7 ⁷
GND 8
16 _VCC
15 _Y0
14 Y1
13 Y2
12 Y3
11 _Y4
10 _Y5
9 Y6
FUNCTION TABLE
Inputs
Outputs
E3 E2 E1 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X X H XXX H HHHHHHH
X H X XXX H HHHHHHH
L X X XXX H HHHHHHH
H L L LLL LHHHHHHH
H L L LLHH L HHHHHH
H L L LHL HH L HHHHH
H L L LHH H H H L H H H H
H L L HLL HHHH L HHH
H L L HLHHHHHH L HH
H L L HHL H H H H H H L H
H L L HHH H H H H H H H L
H = high level (steady state); L = low level (steady state);
X = don’t care
A0 ¹
SELECT
INPUTS
A1
2
A2 ³
ENABLE ^{E3 6}
INPUTS _E2 ⁵
E1 ⁴
LOGIC DIAGRAM
15 _Y0
14 _Y1
13 _Y2
12 _Y3
11 _Y4
10
Y5
9 _Y6
7
Y7
ACTIVE--LOW
OUTPUTS
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