MC74AC157, MC74ACT157
Quad 2-Input Multiplexer
The MC74AC157/74ACT157 is a high−speed quad 2−input
multiplexer. Four bits of data from two sources can be selected using
the common Select and Enable inputs. The four outputs present the
selected data in the true (non−inverted) form.
The MC74AC157/74ACT157 can also be used as a function
generator.
Features
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MARKING
DIAGRAMS
16
16
1
SOIC−16
D SUFFIX
CASE 751B
1
16
16
1
TSSOP−16
DT SUFFIX
CASE 948F
1
xxx
= AC or ACT
A
= Assembly Location
WL or L = Wafer Lot
Y
= Year
WW or W = Work Week
G or
G
= Pb−Free Package
(Note: Microdot may be in either location)
xxx
157
ALYWG
G
xxx157G
AWLYWW
•
Outputs Source/Sink 24 mA
•
′
ACT157 Has TTL Compatible Inputs
•
These are Pb−Free Devices
V
CC
16
E
15
I
0c
14
I
1c
13
Z
c
12
I
0d
11
I
1d
10
Z
d
9
1
S
2
I
0a
3
I
1a
4
Z
a
5
I
0b
6
I
1b
7
Z
b
8
GND
Figure 1. Pinout: 16−Lead Packages Conductors
(Top View)
PIN NAMES
TRUTH TABLE
Inputs
E
H
L
L
L
L
S
X
H
H
L
L
I
0
X
X
X
L
H
I
1
X
L
H
X
X
Outputs
Z
L
L
H
L
H
PIN
I
0a
−I
0d
I
1a
−I
1d
E
S
Z
a
−Z
d
FUNCTION
Source 0 Data Inputs
Source 0 Data Inputs
Enable Input
Select Input
Outputs
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
©
Semiconductor Components Industries, LLC, 2015
1
January, 2015 − Rev. 8
Publication Order Number:
MC74AC157/D
MC74AC157, MC74ACT157
E I
0a
I
1a
I
0b
I
1b
I
0c
I
1c
I
0d
I
1d
S
Z
a
Z
b
Z
c
Z
d
Figure 2. Logic Symbol
FUNCTIONAL DESCRIPTION
The MC74AC157/74ACT157 is a quad 2−input
multiplexer. It selects four bits of data from two sources
under the control of a common Select input (S). The Enable
input (E) is active−LOW. When E is HIGH, all of the outputs
(Z) are forced LOW regardless of all other inputs. The
MC74AC157/74ACT157 is the logic implementation of a
4−pole, 2−position switch where the position of the switch
is determined by the logic levels supplied to the Select input.
The logic equations for the outputs are shown below:
Z
a
= E
•
(I
1a
•
S+I
0a
•
S)
Z
b
= E
•
(I
1b
•
S+I
0b
•
S)
Z
c
= E
•
(I
1c
•
S+I
0c
•
S)
Z
d
= E
•
(I
1d
•
S+I
0d
•
S)
A common use of the MC74AC157/74ACT157 is the
moving of data from two groups of registers to four common
output busses. The particular register from which the data
comes is determined by the state of the Select input. A less
obvious use is as a function generator. The
MC74AC157/74ACT157 can generate any four of the
sixteen different functions of two variables with one
variable common. This is useful for implementing gating
functions.
I
0a
I
1a
I
0b
I
1b
I
0c
I
1c
I
0d
I
1d
E
S
Z
a
NOTE:
Z
b
Z
c
Z
d
This diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
Figure 3. Logic Diagram
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2
MC74AC157, MC74ACT157
MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
T
L
T
J
q
JA
P
D
MSL
F
R
V
ESD
DC Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Sink/Source Current
DC Supply Current per Output Pin
DC Ground Current per Output Pin
Storage Temperature Range
Lead temperature, 1 mm from Case for 10 Seconds
Junction temperature under Bias
Thermal Resistance (Note 2)
Power Dissipation in Still Air at 65°C (Note 3)
Moisture Sensitivity
Flammability Rating
ESD Withstand Voltage
Oxygen Index: 30% − 35%
Human Body Model (Note 4)
Machine Model (Note 5)
Charged Device Model (Note 6)
Above V
CC
and Below GND at 85°C (Note 7)
SOIC
TSSOP
SOIC
TSSOP
(Note 1)
Parameter
Value
*0.5
to
)7.0
*0.5 v
V
I
v
V
CC
)0.5
*0.5 v
V
O
v
V
CC
)0.5
$20
$50
$50
$50
$50
*65
to
)150
260
)150
69.1
103.8
500
500
Level 1
UL 94 V−0 @ 0.125 in
> 2000
> 200
> 1000
$100
V
Unit
V
V
V
mA
mA
mA
mA
mA
°C
°C
°C
°C/W
mW
I
Latch−Up
Latch−Up Performance
mA
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. I
O
absolute maximum rating must be observed.
2. The package thermal impedance is calculated in accordance with JESD51−7.
3. 500 mW at 65°C; derate to 300 mW by 10 mW/ from 65°C to 85°C.
4. Tested to EIA/JESD22−A114−A.
5. Tested to EIA/JESD22−A115−A.
6. Tested to JESD22−C101−A.
7. Tested to EIA/JESD78.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IN
, V
OUT
Supply Voltage
DC Input Voltage, Output Voltage (Ref. to GND)
V
CC
@ 3.0 V
t
r
, t
f
Input Rise and Fall Time (Note 1)
′AC
Devices except Schmitt Inputs
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
V
CC
@ 4.5 V
V
CC
@ 5.5 V
t
r
, t
f
T
J
T
A
I
OH
I
OL
V
CC
@ 4.5 V
V
CC
@ 5.5 V
Parameter
′AC
′ACT
Min
2.0
4.5
0
−
−
−
−
−
−
−40
−
−
Typ
5.0
5.0
−
150
40
25
10
8.0
−
25
−
−
Max
6.0
5.5
V
CC
−
−
−
−
−
140
85
−24
24
ns/V
°C
°C
mA
mA
ns/V
V
V
Unit
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
1. V
IN
from 30% to 70% V
CC
; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. V
IN
from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
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3
MC74AC157, MC74ACT157
DC CHARACTERISTICS
74AC
Symbol
Parameter
V
CC
(V)
T
A
= +25°C
Typ
V
IH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output 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
V
OL
Maximum Low Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
I
IN
I
OLD
I
OHD
I
CC
Maximum Input
Leakage Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
5.5
5.5
1.5
2.25
2.75
1.5
2.25
2.75
2.99
4.49
5.49
−
−
−
0.002
0.001
0.001
−
−
−
−
−
−
−
74AC
T
A
=
−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
−
−
8.0
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
V
OUT
= 0.1 V
or V
CC
− 0.1 V
V
OUT
= 0.1 V
or V
CC
− 0.1 V
I
OUT
= −50
mA
V
*V
IN
= V
IL
or V
IH
−12 mA
I
OH
−24 mA
−24 mA
I
OUT
= 50
mA
V
*V
IN
= V
IL
or V
IH
12 mA
I
OL
24 mA
24 mA
V
I
= V
CC
, GND
V
OLD
= 1.65 V Max
V
OHD
= 3.85 V Min
V
IN
= V
CC
or GND
V
IL
V
V
OH
V
V
mA
mA
mA
mA
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
NOTE: I
IN
and I
CC
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
CC
.
AC CHARACTERISTICS
(For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74AC
Symbol
Parameter
V
CC
*
(V)
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation Delay
S to Z
n
Propagation Delay
S to Z
n
Propagation Delay
E to Z
n
Propagation Delay
E
n
to Z
n
Propagation Delay
I
n
to Z
n
Propagation Delay
I
n
to Z
n
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
T
A
= +25°C
C
L
= 50 pF
Typ
7.0
5.5
6.5
5.0
7.0
5.5
6.5
5.5
5.0
4.0
5.0
4.0
Max
11.5
9.0
11.0
8.5
11.5
9.0
11.0
9.0
8.5
6.5
8.0
6.5
74AC
T
A
= −40°C
to +85°C
C
L
= 50 pF
Min
1.5
1.5
1.5
1.0
1.5
1.5
1.5
1.0
1.0
1.0
1.0
1.0
Max
13.0
10.0
12.0
9.5
13.0
10.0
12
9.5
9.0
7.0
9.0
7.0
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.
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MC74AC157, MC74ACT157
DC CHARACTERISTICS
74ACT
Symbol
Parameter
V
CC
(V)
T
A
= +25°C
Typ
V
IH
V
IL
V
OH
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
V
OL
Maximum Low Level
Output Voltage
4.5
5.5
4.5
5.5
I
IN
DI
CCT
I
OLD
I
OHD
I
CC
Maximum Input
Leakage Current
Additional Max. I
CC
/Input
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
5.5
5.5
5.5
1.5
1.5
1.5
1.5
4.49
5.49
−
−
0.001
0.001
−
−
−
0.6
−
−
−
74ACT
T
A
=
−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
−
−
−
8.0
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
V
OUT
= 0.1 V
or V
CC
− 0.1 V
V
OUT
= 0.1 V
or V
CC
− 0.1 V
I
OUT
= −50
mA
*V
IN
= V
IL
or V
IH
−24 mA
I
OH
−24 mA
I
OUT
= 50
mA
*V
IN
= V
IL
or V
IH
24 mA
I
OL
24 mA
V
I
= V
CC
, GND
V
I
= V
CC
− 2.1 V
V
OLD
= 1.65 V Max
V
OHD
= 3.85 V Min
V
IN
= V
CC
or GND
V
V
V
mA
mA
mA
mA
mA
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
AC CHARACTERISTICS
(For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74ACT
Symbol
Parameter
V
CC
*
(V)
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation Delay
S to Z
n
Propagation Delay
S to Z
n
Propagation Delay
E
n
to Z
n
Propagation Delay
E
n
to Z
n
Propagation Delay
I
n
to Z
n
Propagation Delay
I
n
to Z
n
5.0
5.0
5.0
5.0
5.0
5.0
2.0
2.0
1.5
1.5
1.5
1.5
T
A
= +25°C
C
L
= 50 pF
Typ
−
−
−
−
−
−
Max
9.0
9.5
10
8.5
7.0
7.5
74ACT
T
A
= −40°C
to +85°C
C
L
= 50 pF
Min
1.5
2.0
1.5
1.0
1.0
1.0
Max
10.0
10.5
11.5
9.0
8.5
8.5
ns
ns
ns
ns
ns
ns
3−6
3−6
3−6
3−6
3−5
3−5
Unit
Fig.
No.
*Voltage Range 5.0 V is 5.0 V
±0.5
V.
CAPACITANCE
Symbol
C
IN
C
PD
Input Capacitance
Power Dissipation Capacitance
Parameter
Value − Typ
4.5
50
Unit
pF
pF
Test Conditions
V
CC
= 5.0 V
V
CC
= 5.0 V
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