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Электронный компонент: 74HC4351U

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DATA SHEET
Product specification
File under Integrated Circuits, IC06
December 1990
INTEGRATED CIRCUITS
74HC/HCT4351
8-channel analog
multiplexer/demultiplexer with latch
For a complete data sheet, please also download:
The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
December 1990
2
Philips Semiconductors
Product specification
8-channel analog
multiplexer/demultiplexer with latch
74HC/HCT4351
FEATURES
Wide analog input voltage range:
5 V
Low "ON" resistance:
80
(typ.) at V
CC
-
V
EE
= 4.5 V
70
(typ.) at V
CC
-
V
EE
= 6.0 V
60
(typ.) at V
CC
-
V
EE
= 9.0 V
Logic level translation: to enable 5 V logic to
communicate with
5 V analog signals
Typical "break before make" built in
Address latches provided
Output capability: non-standard
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT4351 are high-speed Si-gate CMOS
devices. They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT4351 are 8-channel analog
multiplexers/demultiplexers with three select inputs (S
0
to
S
2
), two enable inputs (E
1
and E
2
), a latch enable input
(LE), eight independent inputs/outputs (Y
0
to Y
7
) and a
common input/output (Z).
With E
1
LOW and E
2
is HIGH, one of the eight switches is
selected (low impedance ON-state) by S
0
to S
2
. The data
at the select inputs may be latched by using the active
LOW latch enable input (LE). When LE is HIGH the latch
is transparent. When either of the two enable inputs,
E
1
(active LOW) and E
2
(active HIGH), is inactive, all 8
analog switches are turned off.
V
CC
and GND are the supply voltage pins for the digital
control inputs (S
0
to S
2
, LE, E
1
and E
2
). The V
CC
to GND
ranges are 2.0 to 10.0 V for HC and 4.5 to 5.5 V for HCT.
The analog inputs/outputs (Y
0
to Y
7
, and Z) can swing
between V
CC
as a positive limit and V
EE
as a negative
limit.
V
CC
-
V
EE
may not exceed 10.0 V.
For operation as a digital multiplexer/demultiplexer, V
EE
is
connected to GND (typically ground).
QUICK REFERENCE DATA
V
EE
= GND = 0 V; T
amb
= 25
C; t
r
= t
f
= 6 ns
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
t
PZH
/ t
PZL
turn "ON" time E
1
, E
2
or S
n
to V
os
C
L
= 15 pF; R
L
= 1 k
; V
CC
= 5 V
27
35
ns
t
PHZ
/ t
PLZ
turn "OFF" time E
1
, E
2
or S
n
to V
os
21
23
ns
C
I
input capacitance
3.5
3.5
pF
C
PD
power dissipation capacitance per switch
notes 1 and 2
25
25
pF
C
S
max. switch capacitance
independent (Y)
5
5
pF
common (Z)
25
25
pF
Notes
1. C
PD
is used to determine the dynamic power
dissipation (P
D
in
W):
P
D
= C
PD
V
CC
2
f
i
+
{(C
L
+ C
S
)
V
CC
2
f
o
}
where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
C
L
= output load capacitance in pF
C
S
= max. switch capacitance in pF
{(C
L
+ C
S
)
V
CC
2
f
o
} = sum of outputs
V
CC
= supply voltage in V
2. For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
-
1.5 V
ORDERING INFORMATION
See
"74HC/HCT/HCU/HCMOS Logic Package
Information"
.
December 1990
3
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
PIN DESCRIPTION
PIN NO.
SYMBOL
NAME AND FUNCTION
4
Z
common
3, 14
n.c.
not connected
7
E
1
enable input (active LOW)
8
E
2
enable input (active HIGH)
9
V
EE
negative supply voltage
10
GND
ground (0 V)
11
LE
latch enable input (active LOW)
15, 13, 12
S
0
to S
2
select inputs
17, 18, 19, 16, 1, 6, 2, 5
Y
0
to Y
7
independent inputs/outputs
20
V
CC
positive supply voltage
Fig.1 Pin configuration.
Fig.2
Fig.3 IEC logic symbol.
December 1990
4
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
FUNCTION TABLE
Notes
1. Last selected channel "ON".
2. Selected channels latched.
3. H = HIGH voltage level
L = LOW voltage level
X = don't care
= HIGH-to-LOW LE transition
APPLICATIONS
Analog multiplexing and demultiplexing
Digital multiplexing and demultiplexing
Signal gating
INPUTS
CHANNEL
ON
E
1
E
2
LE
S
2
S
1
S
0
H
X
X
L
X
X
X
X
X
X
X
X
none
none
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
L
L
H
H
L
H
L
H
Y
0
Y
1
Y
2
Y
3
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
H
L
H
L
H
Y
4
Y
5
Y
6
Y
7
L
X
H
X
L
X
X
X
X
X
X
(1)
(2)
Fig.4 Functional diagram.
Fig.5 Schematic diagram (one switch).
December 1990
5
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
Voltages are referenced to V
EE
= GND (ground = 0 V)
Note to ratings
1. To avoid drawing V
CC
current out of terminal Z, when switch current flows in terminals Y
n
, the voltage drop across
the bidirectional switch must not exceed 0.4 V. If the switch current flows into terminal Z, no V
CC
current will flow out
of terminals Y
n
. In this case there is no limit for the voltage drop across the switch, but the voltages at Y
n
and Z may
not exceed V
CC
or V
EE
.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
MIN. MAX.
UNIT
CONDITIONS
V
CC
DC supply voltage
-
0.5
+11.0
V
I
IK
DC digital input diode current
20
mA
for V
I
< -
0.5 V or V
I
>
V
CC
+ 0.5 V
I
SK
DC switch diode current
20
mA
for V
S
< -
0.5 V or V
S
>
V
CC
+ 0.5 V
I
S
DC switch current
25
mA
for
-
0.5 V
<
V
S
<
V
CC
+ 0.5 V
I
EE
DC V
EE
current
20
mA
I
CC;
I
GND
DC V
CC
or GND current
50
mA
T
stg
storage temperature range
-
65
+150
C
P
tot
power dissipation per package
for temperature range:
-
40 to +125
C
74HC/HCT
plastic DIL
750
mW
above +70
C: derate linearly with 12 mW/K
plastic mini-pack (SO)
500
mW
above +70
C: derate linearly with 8 mW/K
P
S
power dissipation per switch
100
mW
SYMBOL
PARAMETER
74HC
74HCT
UNIT
CONDITIONS
min.
typ. max. min. typ. max.
V
CC
DC supply voltage V
CC
-
GND
2.0
5.0
10.0
4.5
5.0
5.5
V
see Figs 6 and 7
V
CC
DC supply voltage V
CC
-
V
EE
2.0
5.0
10.0
2.0
5.0
10.0
V
see Figs 6 and 7
V
I
DC input voltage range
GND
V
CC
GND
V
CC
V
V
S
DC switch voltage range
V
EE
V
CC
V
EE
V
CC
V
T
amb
operating ambient temperature range
-
40
+85
-
40
+85
C
see DC and AC
CHARACTERISTICS
T
amb
operating ambient temperature range
-
40
+125
-
40
+125
C
t
r
, t
f
input rise and fall times
6.0
1000
500
400
250
6.0
500
ns
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
CC
= 10.0 V