Datasheet

2
Functional Diagram
TRUTH TABLE
INPUTS OUTPUT
SELECT
OUTPUT
CONTROL OE Y YS2 S1 S0
XXX H ZZ
LLL L I
0
I
0
LLH L I
1
I
1
LHL L I
2
I
2
LHH L I
3
I
3
HLL L I
4
I
4
HLH L I
5
I
5
HHL L I
6
I
6
HHH L I
7
I
7
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care, Z = High Impedance
(Off), I
0
, I
1
...I
7
= the level of the respective input.
5
6
Y
Y
4
3
2
1
14
12
13
15
I
0
I
7
I
6
I
5
I
4
I
3
I
2
I
1
11
S
0
10
S
1
9
S
2
7
OE
CHANNEL
INPUTS
DATA
SELECT
OUTPUTS
CD54HC251, CD74HC251, CD54HCT251, CD74HCT251