MC74AC253 [ONSEMI]
DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS; 双路4输入多路复用器与3态输出
| 型号： | MC74AC253 |
| 厂家： | 
ONSEMI |
| 描述： | DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS |
| 文件： | 总8页 (文件大小：183K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DUAL 4-INPUT
MULTIPLEXER WITH
3-STATE OUTPUTS
The MC74AC253/74ACT253 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.
• Multifunctional Capability
• Noninverting 3-State Outputs
• Outputs Source/Sink 24 mA
• ′ACT253 Has TTL Compatible Inputs
N SUFFIX
CASE 648-08
PLASTIC
V
OE
S
I
I
I
I
Z
b
CC
b
0
3b
13
2b
12
1b
11
0b
10
16
15
14
9
PIN NAMES
I
I
–I
–I
0b 3b
Side A Data Inputs
Side B Data Inputs
Common Select Inputs
Side A Output Enable Input
Side B Output Enable Input
3-State Outputs
0a 3a
D SUFFIX
CASE 751B-05
PLASTIC
S , S
OE
OE
0
1
a
b
1
2
3
4
5
6
7
8
Z
Z
OE
S
1
I
I
I
I
0a
Z
a
GND
a,
b
a
3a
2a
1a
TRUTH TABLE
Select
Inputs
Output
Enable
Data Inputs
Outputs
LOGIC SYMBOL
S
0
S
1
I
0
I
1
I
2
I
3
OE
Z
X
L
L
H
H
L
L
H
H
X
L
L
L
L
H
H
H
H
X
L
X
X
X
L
H
X
X
X
X
X
X
X
X
X
L
H
X
X
X
X
X
X
X
X
X
L
H
L
L
L
L
L
L
L
L
Z
L
H
L
H
L
H
L
OE
0
I
I
I
I
I
I
I
I
OE
a
0a 1a 2a 3a 0b 1b 2b 3b b
S
S
H
X
X
X
X
X
X
1
Z
Z
b
a
H
H
Address inputs S and S are common to both sections.
0
1
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
FACT DATA
5-1
MC74AC253 MC74ACT253
FUNCTIONAL DESCRIPTION
The MC74AC253/74ACT253 contains two identical
4-input multiplexers with 3-state outputs. They select two bits
Iftheoutputsof3-statedevicesaretiedtogether, allbutone
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.
from four sources selected by common Select inputs (S , S ).
0
1
The 4-input multiplexers have individual Output Enable (OE ,
a
OE ) inputs which, when HIGH, force the outputs to a high
b
impedance (High Z) state. This device is the logic
implementation of a 2-pole, 4-position switch, where the
positionoftheswitchisdeterminedbythelogiclevelssupplied
to the two select inputs. The logic equations for the outputs are
shown:
Z = OE
a
a•(I0a•S1•S0+I1a•S1•S +
2a•S1•S0+I3a•S1•S )
Z = OE
0
I
0
b
b•(I0b•S1•S0+I1b•S1•S +
0
I
2b•S1•S0+I3b•S1•S )
0
LOGIC DIAGRAM
OE
I
I
I
I
S
S
I
I
I
I
OE
a
b
3b
2b
1b
0b
0
1
3a
2a
1a
0a
Z
Z
a
b
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
FACT DATA
5-2
MC74AC253 MC74ACT253
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
V
V
V
DC Supply Voltage (Referenced to GND)
–0.5 to +7.0
CC
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
–0.5 to V
+0.5
V
in
CC
V
out
–0.5 to V
+0.5
V
CC
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.
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
I
–24
24
mA
mA
OH
Output Current — Low
OL
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
FACT DATA
5-3
MC74AC253 MC74ACT253
DC CHARACTERISTICS
Symbol
74AC
= +25°C
74AC
T
A
=
V
(V)
CC
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
= 0.1 V
– 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
or V
CC
= 0.1 V
OUT
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
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
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
I
24 mA
24 mA
OL
I
IN
Maximum Input
Leakage Current
5.5
5.5
±0.1
±0.5
±1.0
±5.0
µA
µA
V = V , GND
CC
I
I
V (OE) = V , V
IL IH
Maximum
3-State
Current
OZ
I
V = V , GND
I
CC
= V , GND
CC
V
O
I
I
I
5.5
5.5
75
mA
mA
V
= 1.65 V Max
†Minimum Dynamic
Output Current
OLD
OHD
CC
OLD
OHD
–75
V
V
= 3.85 V Min
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.
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
5-4
MC74AC253 MC74ACT253
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
Propagation Delay
to Z
3.3
5.0
2.0
2.0
15.5
11.0
2.0
1.5
17.5
12.5
t
t
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
ns
ns
3-6
3-6
3-5
3-5
3-7
3-8
3-7
3-8
PLH
S
n
n
Propagation Delay
to Z
3.3
5.0
2.5
2.0
16.0
11.5
2.0
1.5
18.0
13.0
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
S
n
n
Propagation Delay
to Z
3.3
5.0
1.5
1.5
14.5
10.0
1.5
1.5
17.0
11.5
I
n
n
Propagation Delay
to Z
3.3
5.0
2.0
1.5
13.0
9.5
1.5
1.5
15.0
11.0
I
n
n
3.3
5.0
1.5
1.5
8.0
6.0
1.0
1.0
8.5
6.5
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
3.3
5.0
1.5
1.5
8.0
6.0
1.0
1.0
9.0
7.0
3.3
5.0
2.0
2.0
9.5
8.0
1.5
1.5
10.0
8.5
3.3
5.0
1.5
1.5
8.0
7.0
1.0
1.0
9.0
7.5
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
FACT DATA
5-5
MC74AC253 MC74ACT253
DC CHARACTERISTICS
Symbol
74ACT
= +25°C
74ACT
T
A
=
V
(V)
CC
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
= 0.1 V
– 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
or V
CC
= 0.1 V
OUT
4.5
5.5
1.5
1.5
0.8
0.8
0.8
0.8
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
5.5
±0.1
±1.0
µA
V = V , GND
I
CC
∆I
CCT
Additional Max. I /Input
CC
0.6
1.5
mA
V = V
– 2.1 V
I
CC
I
V (OE) = V , V
IL IH
Maximum
3-State
Current
OZ
I
5.5
±0.5
±5.0
µA
V = V , GND
I
CC
= V , GND
CC
V
O
I
I
I
5.5
5.5
75
mA
mA
V
= 1.65 V Max
†Minimum Dynamic
Output Current
OLD
OLD
OHD
–75
V
V
= 3.85 V Min
OHD
CC
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
5-6
MC74AC253 MC74ACT253
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
to Z
t
t
t
t
5.0
5.0
5.0
5.0
2.0
11.5
2.0
13.0
14.5
11.0
12.5
ns
ns
ns
ns
3-6
3-6
3-5
3-5
PLH
S
n
n
Propagation Delay
to Z
3.0
2.5
3.5
13.0
10.0
11.0
2.5
2.0
3.0
PHL
PLH
PHL
S
n
n
Propagation Delay
to Z
I
n
n
Propagation Delay
to Z
I
n
n
t
t
t
t
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
5.0
5.0
5.0
5.0
2.0
2.0
3.0
2.5
7.5
8.0
9.5
7.5
1.5
1.5
2.5
2.0
8.5
9.0
ns
ns
ns
ns
3-7
3-8
3-7
3-8
PZH
PZL
PHZ
PLZ
10.0
8.5
* 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
5-7
MC74AC253 MC74ACT253
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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MC74AC253/D
◊
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