Datasheet

2
Functional Diagrams
TRUTH TABLE
SELECT INPUTS
(Note 1) DATA INPUTS
OUTPUT
ENABLE OUTPUT
S1 S0 I
0
I
1
I
2
I
3
OE Y
XXXXXXHZ
LLLXXXLL
LLHXXXLH
LHXLXXLL
LHXHXXLH
HLXXLXLL
HLXXHXLH
HHXXXLLL
HHXXXHLH
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care, Z = High Impedance (Off).
NOTE:
1. Select inputs S1 and S0 are common to both sections.
2OE 2I
3
2I
2
2I
1
2I
0
S
0
S
1
1I
0
1I
1
1I
2
1I
3
1OE
15 13 12 11 10 14 2 6 5 4 3 1
2OE
2OE
1OE
1OE
PN PN
2OE 2OE
9
2Y
1OE
1OE
7
1Y
16
8
V
CC
GND
CD74HC253, CD74HCT253