Datasheet

2
Functional Diagram
’HC4351, CD74HCT4351
TG
TG
TG
TG
TG
TG
TG
4
A
COMMON
OUT/IN
BINARY
TO
1 OF 8
DECODER
WITH
ENABLE
15
13
12
8E2
S2
S1
S0
LOGIC
LEVEL
CONVERSION
20
V
CC
TG
LATCHES
7E1
11LE
171819161625
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
CHANNEL IN/OUT
10 9
GND V
EE
TRUTH TABLE
’HC4351, CD74HCT4351
INPUT STATES (NOTE 1)
“ON”
SWITCHES
LE = HE1 E2 S2 S1 S0
LHLLL A
0
LHLLH A
1
LHLHL A
2
LHLHH A
3
LHHLL A
4
LHHLH A
5
LHHHL A
6
LHHHH A
7
H L X X X None
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
NOTE:
1. When LE is low S0-S2 data are latched and switches cannot
change state.
FIGURE 1. DETAIL OF ONE HC/HCT4351 SWITCH
An
IN/OUT
P
A COMMON
IN/OUT
P
N
N
N
N
V
CC
V
CC
V
EE
FROM
SELECT
LOGIC
CD54HC4351, CD74HC4351, CD74HCT4351, CD74HC4352