5-1
FACT DATA
Dual 4 Input Multiplexer
with 3 State Outputs
The MC74AC353/74ACT353 is a dual 4-input multiplexer with 3-state outputs.
It can select two bits of data from four sources using common Select inputs. The
outputs may be individually switched to a high impedance state with a HIGH on the
respective Output Enable (OE) inputs, allowing the outputs to interface directly with
bus-oriented systems.
Inverted Version of the MC74AC253/74ACT253
Multifunction Capability
Separate Enables for Each Multiplexer
Outputs Source/Sink 24 mA
ACT353 Has TTL Compatible Inputs
15
16
14
13
12
11
10
2
1
3
4
5
6
7
VCC
9
8
OEb
S0
I3b
I2b
I1b
I0b
Zb
OEa
S1
I3a
I2a
I1a
I0a
Za
GND
PIN NAMES
I0aI3a
Side A Data Inputs
I0bI3b
Side B Data Inputs
S0, S1
Common Select Inputs
OEa
Side A Enable Input
OEb
Side B Enable Input
Za, Zb
Multiplexer Outputs
TRUTH TABLE
Select
Inputs
Data Inputs
Output
Enable
Outputs
S0
S1
I0
I1
I2
I3
OE
Z
X
X
X
X
X
X
H
Z
L
L
L
X
X
X
L
H
L
L
H
X
X
X
L
L
H
L
X
L
X
X
L
H
H
L
X
H
X
X
L
L
L
H
X
X
L
X
L
H
L
H
X
X
H
X
L
L
H
H
X
X
X
L
L
H
H
H
X
X
X
H
L
L
Address inputs S0 and S1 are common to both sections.
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
MC74AC353
MC74ACT353
DUAL 4-INPUT
MULTIPLEXER WITH
3-STATE OUTPUTS
N SUFFIX
CASE 648-08
PLASTIC
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
S0
S1
OEa I0a I1a I2a I3a
Za
Zb
I0b I1b I2b I3b OEb
MC74AC353 MC74ACT353
5-2
FACT DATA
FUNCTIONAL DESCRIPTION
The MC74AC353/74ACT353 contains two identical
4-input multiplexers with 3-state outputs. They select two bits
from four sources selected by common Select inputs (S0, S1).
The 4-input multiplexers have individual Output Enable (OEa,
OEb) inputs which, when HIGH, force the outputs to a high
impedance (High Z) state. The logic equations for the outputs
are shown below:
Za = OEa
(I0a
S1
S0+I1a
S1
S0+
I2a
S1
S0+I3a
S1
S0)
Zb = OEb
(I0b
S1
S0+I1b
S1
S0+
I2b
S1
S0+I3b
S1
S0)
If the outputs of 3-state devices are tied together, all but one
device must be in the high impedance state to avoid high
currents that would exceed the maximum ratings. Designers
should ensure that Output Enable signals to 3-state devices
whose outputs are tied together are designed so that there is
no overlap.
OEb
I3b
I2b
I1b
I0b
S0
S1
I3a
I2a
Zb
Za
I1a
I0a
OEa
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
LOGIC DIAGRAM
MC74AC353 MC74ACT353
5-3
FACT DATA
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
DC Supply Voltage (Referenced to GND)
0.5 to +7.0
V
Vin
DC Input Voltage (Referenced to GND)
0.5 to VCC +0.5
V
Vout
DC Output Voltage (Referenced to GND)
0.5 to VCC +0.5
V
Iin
DC Input Current, per Pin
20
mA
Iout
DC Output Sink/Source Current, per Pin
50
mA
ICC
DC VCC or GND Current per Output Pin
50
mA
Tstg
Storage Temperature
65 to +150
C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
AC
2.0
5.0
6.0
V
VCC
Supply Voltage
ACT
4.5
5.0
5.5
V
Vin, Vout
DC Input Voltage, Output Voltage (Ref. to GND)
0
VCC
V
tr, tf
Input Rise and Fall Time (Note 1)
AC Devices except Schmitt Inputs
VCC @ 3.0 V
150
tr, tf
Input Rise and Fall Time (Note 1)
AC Devices except Schmitt Inputs
VCC @ 4.5 V
40
ns/V
r, tf
AC Devices except Schmitt Inputs
VCC @ 5.5 V
25
tr, tf
Input Rise and Fall Time (Note 2)
ACT Devices except Schmitt Inputs
VCC @ 4.5 V
10
ns/V
tr, tf
Input Rise and Fall Time (Note 2)
ACT Devices except Schmitt Inputs
VCC @ 5.5 V
8.0
ns/V
TJ
Junction Temperature (PDIP)
140
C
TA
Operating Ambient Temperature Range
40
25
85
C
IOH
Output Current -- High
24
mA
IOL
Output Current -- Low
24
mA
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
MC74AC353 MC74ACT353
5-4
FACT DATA
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74AC
74AC
Unit
Conditions
Symbol
Parameter
VCC
(V)
TA = +25
C
TA =
40
C to +85
C
Unit
Conditions
Typ
Guaranteed Limits
VIH
Minimum High Level
Input Voltage
3.0
1.5
2.1
2.1
VOUT = 0.1 V
Input Voltage
4.5
2.25
3.15
3.15
V
or VCC 0.1 V
5.5
2.75
3.85
3.85
VIL
Maximum Low Level
Input Voltage
3.0
1.5
0.9
0.9
VOUT = 0.1 V
Input Voltage
4.5
2.25
1.35
1.35
V
or VCC 0.1 V
5.5
2.75
1.65
1.65
VOH
Minimum High Level
Output Voltage
3.0
2.99
2.9
2.9
IOUT = 50
A
Output Voltage
4.5
4.49
4.4
4.4
V
5.5
5.49
5.4
5.4
V
*VIN = VIL or VIH
3.0
2.56
2.46
V
12 mA
4.5
3.86
3.76
V
IOH
24 mA
5.5
4.86
4.76
24 mA
VOL
Maximum Low Level
Output Voltage
3.0
0.002
0.1
0.1
IOUT = 50
A
Output Voltage
4.5
0.001
0.1
0.1
V
5.5
0.001
0.1
0.1
V
*VIN = VIL or VIH
3.0
0.36
0.44
V
12 mA
4.5
0.36
0.44
V
IOL
24 mA
5.5
0.36
0.44
24 mA
IIN
Maximum Input
Leakage Current
5.5
0.1
1.0
A
VI = VCC, GND
Leakage Current
5.5
0.1
1.0
A
VI = VCC, GND
IOZ
Maximum
3-State
Current
VI (OE) = VIL, VIH
3-State
Current
5.5
0.5
5.0
A
VI = VCC, GND
Current
VO = VCC, GND
IOLD
Minimum Dynamic
Output Current
5.5
75
mA
VOLD = 1.65 V Max
IOHD
Output Current
5.5
75
mA
VOHD = 3.85 V Min
ICC
Maximum Quiescent
Supply Current
5.5
8.0
80
A
VIN = VCC or GND
Supply Current
5.5
8.0
80
A
VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
MC74AC353 MC74ACT353
5-5
FACT DATA
AC CHARACTERISTICS (For Figures and Waveforms -- See Section 3)
Symbol
Parameter
VCC*
(V)
74AC
74AC
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25
C
CL = 50 pF
TA = 40
C
to +85
C
CL = 50 pF
Unit
Fig.
No.
Min
Typ
Max
Min
Max
tPLH
Propagation Delay
3.3
3.0
15.5
2.0
17.5
ns
3-6
tPLH
Sn to Zn
5.0
3.0
11.0
2.0
12.5
ns
3-6
tPHL
Propagation Delay
3.3
3.0
16.0
2.0
18.0
ns
3-6
tPHL
Sn to Zn
5.0
3.0
11.5
2.0
13.0
ns
3-6
tPLH
Propagation Delay
3.3
2.0
14.5
1.0
17.0
ns
3-6
tPLH
In to Zn
5.0
2.0
10.0
1.0
11.5
ns
3-6
tPHL
Propagation Delay
3.3
2.0
13.0
1.0
15.0
ns
3-6
tPHL
In to Zn
5.0
2.0
9.5
1.0
11.0
ns
3-6
tPZH
Output Enable Time
3.3
1.0
8.0
0.5
8.5
ns
3-7
tPZH
Output Enable Time
5.0
1.0
6.0
0.5
6.5
ns
3-7
tPZL
Output Enable Time
3.3
1.0
8.0
0.5
9.0
ns
3-8
tPZL
Output Enable Time
5.0
1.0
6.0
0.5
7.0
ns
3-8
tPHZ
Output Disable Time
3.3
2.0
9.5
1.0
10.0
ns
3-7
tPHZ
Output Disable Time
5.0
2.0
8.0
1.0
8.5
ns
3-7
tPLZ
Output Disable Time
3.3
2.0
8.0
1.0
9.0
ns
3-8
tPLZ
Output Disable Time
5.0
2.0
7.0
1.0
7.5
ns
3-8
* Voltage Range 3.3 V is 3.3 V
0.3 V.
Voltage Range 5.0 V is 5.0 V
0.5 V.
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