HCF4532B_04 Datasheet, PDF (6/13 Pages) STMicroelectronics – 8-BIT PRIORITY ENCODER

HCF4532B
Figure 5: 0 To 9 Keyboard Encoder
Table 7: Truth Table
INPUTS
OUTPUTS
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 GS Q3’ Q2’ Q1’ Q0
H
X
X
X
X
X
X
X
X
X
L
H
L
L
H
L
H
X
X
X
X
X
X
X
X
L
H
L
L
L
L
L
H
X
X
X
X
X
X
X
H
L
H
H
H
L
L
L
H
X
X
X
X
X
X
H
L
H
H
L
L
L
L
L
H
X
X
X
X
X
H
L
H
L
H
L
L
L
L
L
H
X
X
X
X
H
L
H
L
L
L
L
L
L
L
L
H
X
X
X
H
L
L
H
H
L
L
L
L
L
L
L
H
X
X
H
L
L
H
L
L
L
L
L
L
L
L
L
H
X
H
L
L
L
H
L
L
L
L
L
L
L
L
L
H
H
L
L
L
L
X : Don’t Care
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