MC74ACT157MELG [ONSEMI]
ACT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, LEAD FREE, EIAJ, SOIC-16;型号: | MC74ACT157MELG |
厂家: | ONSEMI |
描述: | ACT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, LEAD FREE, EIAJ, SOIC-16 复用器 输入元件 |
文件: | 总6页 (文件大小:169K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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 (noninverted) form.
The MC74AC157/74ACT157 can also be used as a function generator.
• Outputs Source/Sink 24 mA
• ′ACT157 Has TTL Compatible Inputs
V
E
I
I
Z
I
I
Z
d
CC
0c
14
1c
13
c
0d
11
1d
10
N SUFFIX
CASE 648-08
PLASTIC
16
15
12
9
PIN NAMES
I
I
E
S
–I
–I
1a 1d
Source 0 Data Inputs
Source 1 Data Inputs
Enable Input
0a 0d
1
2
3
4
5
6
7
8
D SUFFIX
CASE 751B-05
PLASTIC
Select Input
S
I
I
Z
I
I
Z
GND
Z –Z
Outputs
0a
1a
a
0b
1b
b
a
d
TRUTH TABLE
Inputs
LOGIC SYMBOL
Outputs
E
S
I
0
I
1
Z
H
L
L
L
L
X
H
H
L
X
X
X
L
X
L
H
X
X
L
L
H
L
E
I
I
I
I
I
I
I
I
0a 1a 0b 1b 0c 1c 0d 1d
S
Z
Z
Z
Z
d
a
b
c
L
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
FACT DATA
5-1
MC74AC157 MC74ACT157
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
logiclevelssuppliedtotheSelectinput.Thelogicequationsfor
the outputs are shown below:
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.
Z = E•(I
a
1a•S+I0a•S)
1b•S+I0b•S)
1c•S+I0c•S)
1d•S+I0d•S)
Z = E•(I
b
Z = E•(I
c
Z = E•(I
d
LOGIC DIAGRAM
I
I
I
I
I
I
I
I
1d
E
S
0a
1a
0b
1b
0c
1c
0d
Z
Z
Z
Z
d
a
b
c
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
MAXIMUM RATINGS*
Symbol
Parameter
Value
–0.5 to +7.0
Unit
V
V
V
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
CC
–0.5 to V
+0.5
+0.5
V
in
CC
CC
V
out
–0.5 to V
V
I
I
I
±20
mA
mA
mA
°C
in
DC Output Sink/Source Current, per Pin
±50
±50
out
CC
DC V
or GND Current per Output Pin
Storage Temperature
CC
T
stg
–65 to +150
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
FACT DATA
5-2
MC74AC157 MC74ACT157
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
2.0
4.5
0
Typ
5.0
5.0
Max
6.0
Unit
V
′AC
V
Supply Voltage
CC
′ACT
5.5
V , V
in out
DC Input Voltage, Output Voltage (Ref. to GND)
V
CC
V
V
CC
V
CC
V
CC
V
CC
V
CC
@ 3.0 V
@ 4.5 V
@ 5.5 V
@ 4.5 V
@ 5.5 V
150
40
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
ns/V
t , t
r f
25
10
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
t , t
r f
ns/V
8.0
T
Junction Temperature (PDIP)
Operating Ambient Temperature Range
Output Current — High
140
85
°C
°C
J
T
A
–40
25
I
–24
24
mA
mA
OH
OL
I
Output Current — Low
1. V from 30% to 70% V ; see individual Data Sheets for devices that differ from the typical input rise and fall times.
in
CC
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
DC CHARACTERISTICS
74AC
= +25°C
74AC
T
A
=
V
(V)
CC
Symbol
Parameter
Unit
Conditions
T
A
–40°C to +85°C
Typ
Guaranteed Limits
V
V
V
3.0
4.5
5.5
1.5
2.25
2.75
2.1
3.15
3.85
2.1
3.15
3.85
V
or V
= 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
– 0.1 V
CC
3.0
4.5
5.5
1.5
2.25
2.75
0.9
1.35
1.65
0.9
1.35
1.65
V
OUT
= 0.1 V
Maximum Low Level
Input Voltage
IL
or V
– 0.1 V
CC
3.0
4.5
5.5
2.99
4.49
5.49
2.9
4.4
5.4
2.9
4.4
5.4
I
= –50 µA
Minimum High Level
Output Voltage
OH
OUT
*V = V or V
IN IL IH
3.0
4.5
5.5
2.56
3.86
4.86
2.46
3.76
4.76
–12 mA
–24 mA
–24 mA
V
V
I
OH
V
OL
3.0
4.5
5.5
0.002
0.001
0.001
0.1
0.1
0.1
0.1
0.1
0.1
I = 50 µA
OUT
Maximum Low Level
Output Voltage
*V = V or V
IN IL
IH
3.0
4.5
5.5
0.36
0.36
0.36
0.44
0.44
0.44
12 mA
V
I
24 mA
24 mA
OL
I
IN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
V = V , GND
I
CC
I
I
I
5.5
5.5
75
mA
mA
V
V
= 1.65 V Max
†Minimum Dynamic
Output Current
OLD
OHD
CC
OLD
–75
= 3.85 V Min
OHD
Maximum Quiescent
Supply Current
5.5
8.0
80
µA
V
IN
= V or GND
CC
* 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 and I
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
.
IN CC
CC
FACT DATA
5-3
MC74AC157 MC74ACT157
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74AC
74AC
T
= –40°C
A
T
C
= +25°C
= 50 pF
V
(V)
*
Fig.
No.
A
L
CC
Symbol
Parameter
to +85°C
C
Unit
= 50 pF
L
Min
Typ
Max
Min
Max
3.3
5.0
1.5
1.5
7.0
5.5
11.5
9.0
1.5
1.5
13.0
10.0
Propagation Delay
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
3-6
3-6
3-6
3-6
3-5
3-5
PLH
S to Z
n
3.3
5.0
1.5
1.5
6.5
5.0
11.0
8.5
1.5
1.0
12.0
9.5
Propagation Delay
S to Z
n
PHL
PLH
PHL
PLH
PHL
3.3
5.0
1.5
1.5
7.0
5.5
11.5
9.0
1.5
1.5
13.0
10.0
Propagation Delay
E to Z
n
3.3
5.0
1.5
1.5
6.5
5.5
11.0
9.0
1.5
1.0
12
9.5
Propagation Delay
E
n
to Z
n
3.3
5.0
1.5
1.5
5.0
4.0
8.5
6.5
1.0
1.0
9.0
7.0
Propagation Delay
to Z
I
n
n
3.3
5.0
1.5
1.5
5.0
4.0
8.0
6.5
1.0
1.0
9.0
7.0
Propagation Delay
to Z
I
n
n
* 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
= +25°C
74ACT
T
A
=
V
(V)
CC
Symbol
Parameter
Unit
Conditions
T
A
–40°C to +85°C
Typ
Guaranteed Limits
V
V
V
4.5
5.5
1.5
1.5
2.0
2.0
2.0
2.0
V
or V
= 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
– 0.1 V
CC
4.5
5.5
1.5
1.5
0.8
0.8
0.8
0.8
V
OUT
= 0.1 V
Maximum Low Level
Input Voltage
IL
or V
– 0.1 V
CC
4.5
5.5
4.49
5.49
4.4
5.4
4.4
5.4
I
= –50 µA
Minimum High Level
Output Voltage
OH
OUT
*V = V or V
IN IL IH
4.5
5.5
3.86
4.86
3.76
4.76
V
V
V
–24 mA
–24 mA
I
OH
V
OL
4.5
5.5
0.001
0.001
0.1
0.1
0.1
0.1
I = 50 µA
OUT
Maximum Low Level
Output Voltage
*V = V or V
IN IL
IH
4.5
5.5
0.36
0.36
0.44
0.44
24 mA
24 mA
I
OL
I
IN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
V = V , GND
I
CC
∆I
Additional Max. I /Input
CC
5.5
5.5
5.5
0.6
1.5
75
mA
mA
mA
V = V
I
– 2.1 V
CCT
CC
I
V
= 1.65 V Max
= 3.85 V Min
OHD
†Minimum Dynamic
Output Current
OLD
OLD
I
–75
V
V
OHD
CC
I
Maximum Quiescent
Supply Current
5.5
8.0
80
µA
= V or GND
CC
IN
* 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
5-4
MC74AC157 MC74ACT157
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74ACT
74ACT
= –40°C
T
A
T
C
= +25°C
= 50 pF
V
(V)
*
Fig.
No.
A
CC
Symbol
Parameter
to +85°C
Unit
L
C
= 50 pF
L
Min
Typ
Max
Min
Max
Propagation Delay
S to Z
t
t
t
t
t
t
5.0
5.0
5.0
5.0
5.0
5.0
2.0
9.0
1.5
10.0
10.5
11.5
9.0
ns
ns
ns
ns
ns
ns
3-6
3-6
3-6
3-6
3-5
3-5
PLH
n
Propagation Delay
S to Z
2.0
1.5
1.5
1.5
1.5
9.5
10
2.0
1.5
1.0
1.0
1.0
PHL
PLH
PHL
PLH
PHL
n
Propagation Delay
to Z
E
n
n
Propagation Delay
to Z
8.5
7.0
7.5
E
n
n
Propagation Delay
to Z
8.5
I
n
n
Propagation Delay
to Z
8.5
I
n
n
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol
Value
Typ
Parameter
Unit
Test Conditions
C
C
Input Capacitance
Power Dissipation Capacitance
4.5
50
pF
pF
V
V
= 5.0 V
= 5.0 V
IN
CC
PD
CC
FACT DATA
5-5
MC74AC157 MC74ACT157
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
NOTES:
CASE 648–08
ISSUE R
–A–
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
16
1
9
8
B
S
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
INCHES
MILLIMETERS
DIM
A
B
C
D
F
MIN
MAX
0.770
0.270
0.175
0.021
0.70
MIN
18.80
6.35
3.69
0.39
1.02
MAX
19.55
6.85
4.44
0.53
1.77
F
0.740
0.250
0.145
0.015
0.040
C
L
SEATING
PLANE
–T–
G
H
J
K
L
0.100 BSC
0.050 BSC
2.54 BSC
1.27 BSC
K
M
0.008
0.015
0.130
0.305
10
0.21
0.38
3.30
7.74
10
H
J
0.110
0.295
0
2.80
7.50
0
G
D 16 PL
M
S
0.020
0.040
0.51
1.01
M
M
0.25 (0.010)
T
A
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
–A–
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
16
1
9
8
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
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.
–B–
P 8 PL
M
S
0.25 (0.010)
B
G
MILLIMETERS
INCHES
DIM
A
B
C
D
MIN
9.80
3.80
1.35
0.35
0.40
MAX
10.00
4.00
1.75
0.49
1.25
MIN
MAX
0.393
0.157
0.068
0.019
0.049
F
0.386
0.150
0.054
0.014
0.016
R X 45
K
C
F
G
J
K
M
P
R
1.27 BSC
0.050 BSC
–T–
SEATING
PLANE
0.19
0.10
0
0.25
0.25
7
0.008
0.004
0
0.009
0.009
7
J
M
D
16 PL
5.80
0.25
6.20
0.50
0.229
0.010
0.244
0.019
M
S
S
0.25 (0.010)
T
B
A
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