Datasheet

December 1990 11
Philips Semiconductors Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
=t
f
= 6 ns; C
L
= 50 pF
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
V
EE
(V)
OTHER+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
V
is
to V
os
6
4
12
8
15
10
18
12
ns 4.5
4.5
0
−4.5
R
L
= ∞;
C
L
= 50 pF
(see Fig.17)
t
PZH
/ t
PZL
turn “ON” time
E
1
to V
os
40
31
75
60
94
75
113
90
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.18)
t
PZH
/ t
PZL
turn “ON” time
E
2
to V
os
35
26
70
50
88
63
105
75
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.18)
t
PZH
/ t
PZL
turn “ON” time
LE to V
os
42
37
75
60
94
75
113
90
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.18)
t
PZH
/ t
PZL
turn “ON” time
S
n
to V
os
39
30
75
60
94
75
113
90
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.18)
t
PHZ
/ t
PLZ
turn “OFF” time
E
1
to V
os
27
20
55
40
69
50
83
60
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.18)
t
PHZ
/ t
PLZ
turn “OFF” time
E
2
to V
os
32
26
60
50
75
63
90
75
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.18)
t
PHZ
/ t
PLZ
turn “OFF” time
LE to V
os
33
30
60
55
75
69
90
83
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.18)
t
PHZ
/ t
PLZ
turn “OFF” time
S
n
to V
os
33
29
65
55
81
69
98
83
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.18)
t
su
set-up time
S
n
to LE
12
14
6
7
15
18
18
21
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.19)
t
h
hold time
S
n
to LE
5
5
−1
−2
5
5
5
5
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.19)
t
W
LE minimum
pulse width HIGH
25
25
13
13
31
31
38
38
ns 4.5
4.5
0
−4.5
R
L
=1 kΩ;
C
L
= 50 pF
(see Fig.19)