Datasheet

2
Functional Diagram
TRUTH TABLE
SELECT INPUTS DATA INPUTS
ENABLE
INPUTS OUTPUT
S1 S0 nI
0
nI
1
nI
2
nI
3
nOE nY
XXXXXXHZ
LLLXXXLL
LLHXXXLH
LHXLXXLL
LHXHXXLH
HLXXLXLL
HLXXHXLH
HHXXXLLL
HHXXXHLH
Select inputs S1 and S0 are common to both sections. H = High level, L = Low inputs, X = Don’t care, Z = High imped-
ance.
GND = 8
V
CC
= 16
1I
2
4
3
1I
3
1I
1
5
1I
0
6
1
14
2
2I
2
12
13
2I
3
2I
1
11
2I
0
10
15
1OE
S0
S1
2OE
SEL/MUX
SEL/MUX
9
7
1Y
2Y
CD74AC253, CD54/74ACT253