CD54HC4351 Datasheet, PDF (2/20 Pages) Texas Instruments – High-Speed CMOS Logic Analog Multiplexers/Demultiplexers with Latch

CD54HC4351, CD74HC4351, CD74HCT4351, CD74HC4352
Functional Diagram
S0 15
’HC4351, CD74HCT4351
V_CC
20
CHANNEL IN/OUT
A₇ A₆ A₅ A₄ A₃ A₂ A₁ A₀
5 2 6 1 16 19 18 17
TG
TG
S1 13
LATCHES
TG
S2 12
LE 11
LOGIC
LEVEL
CONVERSION
BINARY
TO
1 OF 8
DECODER
WITH
ENABLE
TG
A
4 COMMON
OUT/IN
TG
TG
E1 7
TG
TG
E2 8
10
9
GND
V_EE
TRUTH TABLE
’HC4351, CD74HCT4351
INPUT STATES
(NOTE 1)
“ON”
SWITCHES
E1
E2
S2
S1
S0
LE = H
L
H
L
L
L
L
H
L
L
H
L
H
L
H
L
L
H
L
H
H
L
H
H
L
L
L
H
H
L
H
L
H
H
H
L
L
H
H
H
H
H
L
X
X
X
A₀
A₁
A₂
A₃
A₄
A₅
A₆
A₇
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.
FROM
SELECT
LOGIC
An
IN/OUT
P
V_CC
N
N
N
P
V_CC
N
V_EE
FIGURE 1. DETAIL OF ONE HC/HCT4351 SWITCH
2