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 (noninverted) form.
The MC74AC157/74ACT157 can also be used as a function
generator.
Features
• Outputs Source/Sink 24 mA
• ′ACT157 Has TTL Compatible Inputs
• Pb−Free Packages are Available*
16
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PDIP−16
N SUFFIX
CASE 648
1
V
CC
SI0aI
I
E
0cI1cZcI0dI1dZd
15161413121110
2134567
1aZaI0bI1bZb
9
8
GND
Figure 1. Pinout: 16−Lead Packages Conductors
(Top View)
TRUTH TABLE
InputsOutputs
ESI
HXXXL
LHXLL
LHXHH
LLLXL
LLHXH
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
I
0
1
Z
SOIC−16
16
1
16
1
16
1
D SUFFIX
CASE 751B
TSSOP−16
DT SUFFIX
CASE 948F
EIAJ−16
M SUFFIX
CASE 966
PIN NAMES
PIN
I0a−I
I1a−I
E
S
Za−Z
0d
1d
d
FUNCTION
Source 0 Data Inputs
Source 0 Data Inputs
Enable Input
Select Input
Outputs
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 3 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
Semiconductor Components Industries, LLC, 2005
January, 2005 − Rev. 6
1Publication Order Number:
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
MC74AC157/D
MC74AC157, MC74ACT157
EI0aI1aI0bI
S
Z
a
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:
I
0a
I
1a
I
0b
I
1b
I
0c
I0cI1cI0dI
1b
Z
Z
b
c
Z
a
Zb = E•(I
Z
c
Zd = E•(I
Z
d
= E•(I
= E•(I
1d
•S+I0a•S)
1a
•S+I0b•S)
1b
•S+I0c•S)
1c
•S+I0d•S)
1d
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
1c
I
0d
I
1d
ES
Z
a
NOTE: This diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
Z
b
Z
c
Figure 3. Logic Diagram
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2
Z
d
MC74AC157, MC74ACT157
r,f
AC Devices exce t Schmitt In uts
In ut Rise and Fall Time (Note 2)
MARKING DIAGRAMS
PDIP−16SOIC−16TSSOP−16EIAJ−16
MC74AC157N
AWLYYWW
AC157
AWLYWW
AC
157
74AC157
ALYW
ALYW
MC74ACT157N
AWLYYWW
ACT157
AWLYWW
ACT
157
74ACT157
ALYW
ALYW
A= Assembly Location
WL, L= Wafer Lot
YY, Y= Year
WW, W = Work Week
MAXIMUM RATINGS
SymbolParameterValueUnit
V
CC
V
IN
V
OUT
I
IN
I
OUT
I
CC
T
stg
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously . If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
DC Supply Voltage (Referenced to GND)−0.5 to +7.0V
DC Input Voltage (Referenced to GND)−0.5 to VCC +0.5V
DC Output Voltage (Referenced to GND)−0.5 to VCC +0.5V
DC Input Current, per Pin±20mA
DC Output Sink/Source Current, per Pin±50mA
DC VCC or GND Current per Output Pin±50mA
Storage Temperature−65 to +150°C
RECOMMENDED OPERATING CONDITIONS
SymbolParameterMinTypMaxUnit
V
CC
VIN, V
OUT
tr, t
f
tr, t
f
T
J
T
A
I
OH
I
OL
1. VIN from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. V
from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
IN
pp
Supply Voltage
′ACT4.55.05.5
DC Input Voltage, Output Voltage (Ref. to GND)0−V
CC
V
V
VCC @ 3.0 V−150−
′AC2.05.06.0
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
VCC @ 4.5 V−40−ns/V
VCC @ 5.5 V−25−
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
VCC @ 4.5 V−10−
VCC @ 5.5 V−8.0−
ns/V
Junction Temperature (PDIP)−−140°C
Operating Ambient Temperature Range−402585°C
Output Current − High−−−24mA
Output Current − Low−−24mA
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3
MC74AC157, MC74ACT157
ugee
auoee
ugee
V
auoee
V
auu
A
V
V
GND
†y
auQuesce
A
V
V
GND
oagaoeay
Pro agation Delay
Pro agation Delay
Pro agation Delay
Pro agation Delay
Pro agation Delay
DC CHARACTERISTICS
74AC74AC
V
CC
SymbolParameter
(V)
TA = +25°C
TypGuaranteed Limits
V
IH
Minimum High Level
Input Voltage
3.01.52.12.1V
4.52.253.153.15Vor VCC − 0.1 V
5.52.753.853.85
V
IL
Maximum Low Level
Input Voltage
3.01.50.90.9V
4.52.251.351.35Vor VCC − 0.1 V
5.52.751.651.65
V
OH
Minimum High Level
Output Voltage
3.02.992.92.9I
4.54.494.44.4V
5.55.495.45.4
3.0−2.562.46
4.5−3.863.76
5.5−4.864.76−24 mA
V
OL
Maximum Low Level
Output Voltage
3.00.0020.10.1I
4.50.0010.10.1V
5.50.0010.10.1
3.0−0.360.44
4.5−0.360.44
5.5−0.360.4424 mA
I
I
OLD
I
OHD
I
IN
CC
Maximum Input
Leakage Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5−±0.1±1.0
5.5−−75mAV
5.5−−−75mAV
5.5−8.080
*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.
TA =
−40°C to
+85°C
UnitConditions
= 0.1 V
OUT
= 0.1 V
OUT
= −50 A
OUT
*VIN = VIL or V
−12 mA
I
OH
OUT
−24 mA
= 50 A
*VIN = VIL or V
12 mA
I
OL
=
I
OLD
OHD
IN
24 mA
,
CC
= 1.65 V Max
= 3.85 V Min
=
or
CC
IH
IH
AC CHARACTERISTICS(For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
SymbolParameter
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
Propagation Delay
S to Z
n
Propagation Delay
S to Z
n
Propagation Delay
E to Z
n
Propagation Delay
En to Z
n
Propagation Delay
In to Z
n
Propagation Delay
In to Z
n
VCC*
(V)
3.31.57.011.51.513.0
5.01.55.59.01.510.0
3.31.56.511.01.512.0
5.01.55.08.51.09.5
3.31.57.011.51.513.0
5.01.55.59.01.510.0
3.31.56.511.01.512
5.01.55.59.01.09.5
3.31.55.08.51.09.0
5.01.54.06.51.07.0
3.31.55.08.01.09.0
5.01.54.06.51.07.0
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4
74AC74AC
TA = +25°C
C
= 50 pF
L
TA = −40°C
to +85°C
= 50 pF
C
L
MinTypMaxMinMax
Unit
ns3−6
ns3−6
ns3−6
ns3−6
ns3−5
ns3−5
Fig.
No.
MC74AC157, MC74ACT157
ugee
V
auoee
V
ugee
V
I
auoee
V
I
auu
A
V
V
GND
auQuesce
A
V
V
GND
Pro agation Delay
Pro agation Delay
Pro agation Delay
Pro agation Delay
Pro agation Delay
Pro agation Delay
DC CHARACTERISTICS
V
CC
Symbol Parameter
V
IH
Minimum High Level
Input Voltage
V
IL
Maximum Low Level
Input Voltage
V
OH
Minimum High Level
Output Voltage
(V)
4.51.52.02.0
5.51.52.02.0
4.51.50.80.8
5.51.50.80.8
4.54.494.44.4
5.55.495.45.4
4.5−3.863.76V
5.5−4.864.76
V
OL
Maximum Low Level
Output Voltage
4.50.0010.10.1
5.50.0010.10.1
4.5−0.360.44V
5.5−0.360.44
I
I
I
I
IN
CCT
OLD
OHD
I
CC
Maximum Input
Leakage Current
5.5−±0.1±1.0
Additional Max. ICC/Input5.50.6−1.5mAVI = VCC − 2.1 V
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5−−75mAV
5.5−−−75mAV
5.5−8.080
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
TA = +25°C
TypGuaranteed Limits
74ACT74ACT
TA =
−40°C to
+85°C
UnitConditions
V
= 0.1 V
OUT
or VCC − 0.1 V
V
= 0.1 V
OUT
or VCC − 0.1 V
I
= −50 A
OUT
*VIN = VIL or V
OH
I
OUT
−24 mA
−24 mA
= 50 A
*VIN = VIL or V
OL
I
OLD
OHD
IN
=
24 mA
24 mA
,
CC
= 1.65 V Max
= 3.85 V Min
=
or
CC
IH
IH
AC CHARACTERISTICS(For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74ACT74ACT
TA = −40°C
to +85°C
= 50 pF
C
L
Unit
SymbolParameter
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
Propagation Delay
S to Z
n
Propagation Delay
S to Z
n
Propagation Delay
En to Z
n
Propagation Delay
En to Z
n
Propagation Delay
In to Z
n
Propagation Delay
In to Z
n
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
VCC*
(V)
TA = +25°C
C
= 50 pF
L
MinTypMaxMinMax
5.02.0−9.01.510.0ns3−6
5.02.0−9.52.010.5ns3−6
5.01.5−101.511.5ns3−6
5.01.5−8.51.09.0ns3−6
5.01.5−7.01.08.5ns3−5
5.01.5−7.51.08.5ns3−5
Fig.
No.
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5
MC74AC157, MC74ACT157
†
CAPACITANCE
SymbolParameter
C
IN
C
PD
Input Capacitance4.5pFVCC = 5.0 V
Power Dissipation Capacitance50pFVCC = 5.0 V
ORDERING INFORMATION
Device Order NumberPackageShipping
MC74AC157NPDIP−1625 Units / Rail
MC74AC157NGPDIP−16
MC74ACT157NPDIP−1625 Units / Rail
MC74AC157DSOIC−1648 Units / Rail
MC74ACT157DSOIC−1648 Units / Rail
MC74ACT157DGSOIC−16
MC74AC157DTTSSOP−16*96 Units / Rail
MC74ACT157DTTSSOP−16*96 Units / Rail
MC74AC157DTR2TSSOP−16*2500 Tape & Reel
MC74ACT157DTR2TSSOP−16*2500 Tape & Reel
MC74AC157MEIAJ−1650 Units / Rail
MC74ACT157MEIAJ−1650 Units / Rail
MC74AC157MELEIAJ−162000 Tape & Reel
MC74ACT157MELEIAJ−162000 Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*This package is inherently Pb−Free.
(Pb−Free)
(Pb−Free)
(Pb−Free)
(Pb−Free)
Value
Typ
UnitTest Conditions
25 Units / Rail
48 Units / Rail
2500 Tape & Reel
2500 Tape & Reel
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6
MC74AC157, MC74ACT157
PACKAGE DIMENSIONS
PDIP−16
N SUFFIX
CASE 648−08
ISSUE T
−A−
916
B
18
F
C
S
−T−
H
G
D
16 PL
0.25 (0.010)T
K
M
A
SEATING
PLANE
J
M
CASE 751B−05
L
SOIC−16
D SUFFIX
ISSUE J
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS
WHEN FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE
MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
DIM MINMAXMIN MAX
A 0.740 0.770 18.80 19.55
B 0.250 0.2706.356.85
C 0.145 0.1753.694.44
D 0.015 0.0210.390.53
F 0.0400.701.021.77
M
G0.100 BSC2.54 BSC
H0.050 BSC1.27 BSC
J 0.008 0.0150.210.38
K 0.110 0.1302.803.30
L 0.295 0.3057.507.74
M0 10 0 10
S 0.020 0.0400.511.01
MILLIMETERSINCHES
−T−
−A−
169
−B−
18
G
K
C
SEATING
PLANE
D
16 PL
0.25 (0.010)A
M
S
B
T
S
8 PLP
0.25 (0.010)B
M
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
M
S
X 45
R
F
J
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A DOES NOT INCLUDE MOLD FLASH.
PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED
0.25 (0.010) PER SIDE.
5. DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.
6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7. DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE −W−.
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
FLASH OR PROTRUSIONS AND ARE MEASURED
AT THE PARTING LINE. MOLD FLASH OR
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
4. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
5. THE LEAD WIDTH DIMENSION (b) DOES NOT
INCLUDE DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER
RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSIONS AND ADJACENT LEAD
TO BE 0.46 ( 0.018).
MILLIMETERS
DIM MINMAXMIN MAX
−−−2.05−−− 0.081
A
A
0.050.20 0.002 0.008
1
0.350.50 0.014 0.020
b
0.180.27 0.007 0.011
c
9.90 10.50 0.390 0.413
D
5.105.45 0.201 0.215
E
1.27 BSC0.050 BSC
e
H
7.408.20 0.291 0.323
E
0.500.85 0.020 0.033
L
L
1.101.50 0.043 0.059
E
0
M
Q
0.700.90 0.028 0.035
1
−−−0.78−−− 0.031
Z
INCHES
10
10
0
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9
MC74AC157, MC74ACT157
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
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Order Literature: http://www.onsemi.com/litorder
For additional information, please contact your
local Sales Representative.
MC74AC157/D
10
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