MC74AC352
MC74ACT352
Dual 4 Input Multiplexer
The MC74AC352/74ACT352 is a very high-speed dual 4-input multiplexer with
common Select inputs and individual Enable inputs for each section. It can select
two bits of data from four sources. The two buffered outputs present data in the
inverted (complementary) form. The MC74AC352/74ACT352 is the functional
equivalent of the MC74AC153/74ACT153 except with inverted outputs.
•
•
•
•
Inverted Version of the MC74AC153/74ACT153
Separate Enables for Each Multiplexer
Outputs Source/Sink 24 mA
′ACT352
Has TTL Compatible Inputs
DUAL 4-INPUT
MULTIPLEXER
VCC
16
Eb
15
S0
14
I3b
13
I2b
12
I1b
11
I0b
10
Zb
9
PIN NAMES
I0a–I3a
I0b–I3b
S0, S1
Ea
Eb
Za, Zb
Side A Data Inputs
Side B Data Inputs
Common Select Inputs
Side A Enable Input
Side B Enable Input
Multiplexer Outputs
N SUFFIX
CASE 648-08
PLASTIC
1
Ea
2
S1
3
I3a
4
I2a
5
I1a
6
I0a
7
Za
8
GND
D SUFFIX
CASE 751B-05
PLASTIC
TRUTH TABLE
Select Inputs
S0
X
L
L
H
H
L
L
H
H
S1
X
L
L
L
L
H
H
H
H
E
H
L
L
L
L
L
L
L
L
Inputs (a or b)
I0
X
L
H
X
X
X
X
X
X
I1
X
X
X
L
H
X
X
X
X
I2
X
X
X
X
X
L
H
X
X
I3
X
X
X
X
X
X
X
L
H
Output
Z
H
H
L
H
L
H
L
H
L
Ea I0a I1a I2a I3a I0b I1b I2b I3b Eb
LOGIC SYMBOL
S0
S1
Za
Zb
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
FACT DATA
5-1
MC74AC352 MC74ACT352
FUNCTIONAL DESCRIPTION
The MC74AC352/74ACT352 is a dual 4-input multiplexer.
It selects two bits of data from up to four sources under the
control of the common Select inputs (S0, S1). The two 4-input
multiplexer circuits have individual active LOW Enables (Ea,
Eb) which can be used to strobe the outputs independently.
When the Enables (Ea, Eb) are HIGH, the corresponding
outputs (Za, Zb) are forced HIGH.
The logic equations for the outputs are shown below:
Za = Ea
•
(I0a
•
S1
•
S0+I1a
•
S1
•
S0+
I2a
•
S1
•
S0+I3a
•
S1
•
S0)
Zb = Eb
•
(I0b
•
S1
•
S0+I1b
•
S1
•
S0+
I2b
•
S1
•
S0+I3b
•
S1
•
S0)
The MC74AC352/74ACT352 can be used to move data
from a group of registers to a common output bus. The
particular register from which the date came would be
determined by the state of the Select inputs. A less obvious
application is as a function generator. The MC74AC352/
74ACT352 can generate two functions of three variables. This
is useful for implementing highly irregular random logic.
LOGIC DIAGRAM
Ea I0a
I1a
I2a
I3a
S0
S0
I0b
I1b
I2b
I3b Eb
Za
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
Zb
FACT DATA
5-2
MC74AC352 MC74ACT352
MAXIMUM RATINGS*
Symbol
VCC
Vin
Vout
Iin
Iout
ICC
Tstg
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC VCC or GND Current per Output Pin
Storage Temperature
Value
–0.5 to +7.0
–0.5 to VCC +0.5
–0.5 to VCC +0.5
±20
±50
±50
–65 to +150
Unit
V
V
V
mA
mA
mA
°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
VCC
Vin, Vout
Supply Voltage
DC Input Voltage, Output Voltage (Ref. to GND)
VCC @ 3.0 V
tr, tf
Input Rise and Fall Time (Note 1)
′AC
Devices except Schmitt Inputs
VCC @ 4.5 V
VCC @ 5.5 V
tr, tf
TJ
TA
IOH
IOL
Input Rise and Fall Time (Note 2)
′ACT
Devices except Schmitt Inputs
Junction Temperature (PDIP)
Operating Ambient Temperature Range
Output Current — High
Output Current — Low
–40
25
VCC @ 4.5 V
VCC @ 5.5 V
Parameter
′AC
′ACT
Min
2.0
4.5
0
150
40
25
10
ns/V
8.0
140
85
–24
24
°C
°C
mA
mA
ns/V
Typ
5.0
5.0
Max
6.0
5.5
VCC
V
Unit
V
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.
FACT DATA
5-3
MC74AC352 MC74ACT352
DC CHARACTERISTICS
74AC
Symbol
Parameter
VCC
(V)
TA = +25°C
Typ
VIH
Minimum High Level
Input Voltage
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
VOL
Maximum Low Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
IIN
IOLD
IOHD
ICC
Maximum Input
Leakage Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
5.5
5.5
8.0
0.002
0.001
0.001
1.5
2.25
2.75
1.5
2.25
2.75
2.99
4.49
5.49
74AC
TA =
–40°C to +85°C
Unit
Conditions
Guaranteed Limits
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±0.1
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.46
3.76
4.76
0.1
0.1
0.1
0.44
0.44
0.44
±1.0
75
–75
80
V
VOUT = 0.1 V
or VCC – 0.1 V
VOUT = 0.1 V
or VCC – 0.1 V
IOUT = –50
µA
V
*VIN = VIL or VIH
–12 mA
IOH
–24 mA
–24 mA
IOUT = 50
µA
V
*VIN = VIL or VIH
12 mA
IOL
24 mA
24 mA
VI = VCC, GND
VOLD = 1.65 V Max
VOHD = 3.85 V Min
VIN = VCC or GND
VIL
Maximum Low Level
Input Voltage
V
VOH
Minimum High Level
Output Voltage
V
V
µA
mA
mA
µA
* 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.
FACT DATA
5-4
MC74AC352 MC74ACT352
AC CHARACTERISTICS
(For Figures and Waveforms — See Section 3)
74AC
Symbol
Parameter
VCC*
(V)
Min
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Propagation Delay
Sn to Zn
Propagation Delay
Sn to Zn
Propagation Delay
En to Zn
Propagation Delay
En to Zn
Propagation Delay
In to Zn
Propagation Delay
In to Zn
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
TA = +25°C
CL = 50 pF
Typ
8.5
6.5
8.0
6.0
6.0
4.5
5.5
4.0
7.0
5.0
7.0
5.0
Max
15.0
11.0
14.5
11.0
13.5
9.5
11.0
8.0
12.5
9.0
11.5
8.5
74AC
TA = –40°C
to +85°C
CL = 50 pF
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Max
17.5
12.5
16.5
12.0
16.0
11.0
12.5
9.0
14.5
10.5
13.0
10.0
ns
ns
ns
ns
ns
ns
3-6
3-6
3-6
3-6
3-5
3-5
Unit
Fig.
No.
* Voltage Range 3.3 V is 3.3 V
±0.3
V.
Voltage Range 5.0 V is 5.0 V
±0.5
V.
DC CHARACTERISTICS
74ACT
Symbol
Parameter
VCC
(V)
TA = +25°C
Typ
VIH
VIL
VOH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
VOL
Maximum Low Level
Output Voltage
4.5
5.5
4.5
5.5
IIN
∆I
CCT
IOLD
IOHD
ICC
Maximum Input
Leakage Current
Additional Max. ICC/Input
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
5.5
5.5
5.5
8.0
0.6
0.001
0.001
1.5
1.5
1.5
1.5
4.49
5.49
74ACT
TA =
–40°C to +85°C
Unit
Conditions
Guaranteed Limits
2.0
2.0
0.8
0.8
4.4
5.4
3.86
4.86
0.1
0.1
0.36
0.36
±0.1
2.0
2.0
0.8
0.8
4.4
5.4
3.76
4.76
0.1
0.1
0.44
0.44
±1.0
1.5
75
–75
80
V
V
V
VOUT = 0.1 V
or VCC – 0.1 V
VOUT = 0.1 V
or VCC – 0.1 V
IOUT = –50
µA
*VIN = VIL or VIH
–24 mA
IOH
–24 mA
IOUT = 50
µA
*VIN = VIL or VIH
24 mA
IOL
24 mA
VI = VCC, GND
VI = VCC – 2.1 V
VOLD = 1.65 V Max
VOHD = 3.85 V Min
VIN = VCC or GND
V
V
V
µA
mA
mA
mA
µA
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
FACT DATA
5-5
京公网安备 11010802033920号
EEWORLD
