MC74AC373N [MOTOROLA]
OCTAL TRANSPARENT LATCH WITH 3-STATE OUTPUTS; 八路透明锁存器具有三态输出
| 型号： | MC74AC373N |
| 厂家： | 
MOTOROLA |
| 描述： | OCTAL TRANSPARENT LATCH WITH 3-STATE OUTPUTS |
| 文件： | 总8页 (文件大小：200K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
OCTAL TRANSPARENT
LATCH WITH
3-STATE OUTPUTS
The MC74AC373/74ACT373 consists of eight latches with 3-state outputs for bus
organized system applications. The flip-flops appear transparent to the data when
Latch Enable (LE) is HIGH. When LE is LOW, the data that meets the setup time is
latched. Data appears on the bus when the Output Enable (OE) is LOW. When OE
is HIGH, the bus output is in the high impedance state.
• Eight Latches in a Single Package
• 3-State Outputs for Bus Interfacing
• Outputs Source/Sink 24 mA
• ′ACT373 Has TTL Compatible Inputs
N SUFFIX
CASE 738-03
PLASTIC
V
O
D
D
O
O
D
D
O
4
LE
11
CC
7
7
6
6
5
5
4
20
19
18
17
16
15
14
12
13
DW SUFFIX
CASE 751D-04
PLASTIC
1
2
3
4
5
6
7
9
8
10
OE
O
D
D
O
O
D
D
O
3
GND
0
0
1
1
2
2
3
PIN NAMES
LOGIC SYMBOL
D –D
0
Data Inputs
Latch Enable Input
Output Enable Input
7
LE
OE
D
O
D
O
D
O
D
O
D
O
D
O
D
O
D
O
0
1
2
3
4
5
6
7
O –O
3-State Latch Outputs
LE
0
7
OE
0
1
2
3
4
5
6
7
TRUTH TABLE
Inputs
Outputs
OE
LE
D
O
n
n
H
L
L
L
X
H
H
L
X
Z
L
H
L
H
X
O
0
H = HIGH Voltage Level
L = LOW Voltage Level
Z = High Impedance
X = Immaterial
O
= Previous O before LOW-to-HIGH Transition of Clock
0
0
FACT DATA
5-1
MC74AC373 MC74ACT373
FUNCTIONAL DESCRIPTION
The MC74AC373/74ACT373 contains eight D-type latches
with 3-state standard outputs. When the Latch Enable (LE)
inputs a setup time preceding the HIGH-to-LOW transition of
LE. The 3-state standard outputs are controlled by the Output
Enable(OE)input. WhenOEisLOW, thestandardoutputsare
in the 2-state mode. When OE is HIGH, the standard outputs
areinthehighimpedancemodebutthisdoesnotinterferewith
entering new data into the latches.
input is HIGH, data on the D inputs enters the latches. In this
n
condition the latches are transparent, i.e., a latch output will
change state each time its D input changes. When LE is LOW,
the latches store the information that was present on the D
LOGIC DIAGRAM
D
D
D
D
D
D
D
6
D
7
0
1
2
3
4
5
D
D
D
D
D
D
D
D
O
O
O
O
O
O
O
O
G
G
G
G
G
G
G
G
LE
OE
O
O
O
O
O
O
O
6
O
7
0
1
2
3
4
5
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
MC74AC373 MC74ACT373
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
MC74AC373 MC74ACT373
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
MC74AC373 MC74ACT373
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 O
3.3
5.0
1.5
1.5
10
7.0
13.5
9.5
1.5
1.5
15
10.5
t
t
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
ns
ns
3-5
3-5
3-6
3-6
3-7
3-8
3-7
3-8
PLH
D
n
n
Propagation Delay
to O
3.3
5.0
1.5
1.5
9.5
7.0
13
9.5
1.5
1.5
14.5
10.5
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
D
n
n
Propagation Delay
LE to O
3.3
5.0
1.5
1.5
10
7.5
13.5
9.5
1.5
1.5
15
10.5
n
Propagation Delay
LE to O
3.3
5.0
1.5
1.5
9.5
7.0
12.5
9.5
1.5
1.5
14
10.5
n
3.3
5.0
1.5
1.5
9.0
7.0
11.5
8.5
1.0
1.0
13
9.5
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
3.3
5.0
1.5
1.5
8.5
6.5
11.5
8.5
1.0
1.0
13
9.5
3.3
5.0
1.5
1.5
10
8.0
12.5
11
1.0
1.0
14.5
12.5
3.3
5.0
1.5
1.5
8.0
6.5
11.5
8.5
1.0
1.0
12.5
10
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
74AC
74AC
T
= –40°C
A
T
C
= +25°C
= 50 pF
V
CC
(V)
*
Fig.
No.
A
L
Symbol
Parameter
to +85°C
= 50 pF
Unit
C
L
Typ
Guaranteed Minimum
Setup Time, HIGH or LOW
to LE
3.3
5.0
3.5
2.0
5.5
4.0
6.0
4.5
t
t
t
ns
ns
ns
3-9
3-9
3-6
s
D
n
Hold Time, HIGH or LOW
to LE
3.3
5.0
–3.0
–1.5
1.0
1.0
1.0
1.0
h
w
D
n
3.3
5.0
4.0
2.0
5.5
4.0
6.0
4.5
LE Pulse Width, HIGH
* 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
MC74AC373 MC74ACT373
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
MC74AC373 MC74ACT373
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 O
t
t
t
t
5.0
5.0
5.0
5.0
2.5
8.5
10
1.5
11.5
11.5
11.5
11.5
ns
ns
ns
ns
3-5
3-5
3-6
3-6
PLH
D
n
n
Propagation Delay
to O
2.0
2.5
2.0
8.0
8.5
8.0
10
11
10
1.5
2.0
1.5
PHL
PLH
PHL
D
n
n
Propagation Delay
LE to O
n
Propagation Delay
LE to O
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
2.5
1.5
8.0
7.5
9.0
7.5
9.5
9.0
11
1.5
1.5
2.5
1.0
10.5
10.5
12.5
10
ns
ns
ns
ns
3-7
3-8
3-7
3-8
PZH
PZL
PHZ
PLZ
8.5
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
74ACT
74ACT
= –40°C
T
A
T
C
= +25°C
= 50 pF
V
CC
(V)
*
Fig.
No.
A
Symbol
Parameter
to +85°C
= 50 pF
Unit
L
C
L
Typ
Guaranteed Minimum
Setup Time, HIGH or LOW
to LE
t
s
5.0
3.0
7.0
8.0
ns
3-9
D
n
Hold Time, HIGH or LOW
to LE
t
t
5.0
5.0
0
0
1.0
8.0
ns
ns
3-9
3-6
h
D
n
LE Pulse Width, HIGH
2.0
2.0
w
* 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
40
pF
pF
V
V
= 5.0 V
= 5.0 V
IN
CC
PD
CC
FACT DATA
5-7
MC74AC373 MC74ACT373
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
CASE 738–03
ISSUE E
–A–
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
20
1
11
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
B
10
L
C
INCHES
MILLIMETERS
DIM
A
B
C
D
MIN
MAX
1.070
0.260
0.180
0.022
MIN
25.66
6.10
3.81
0.39
MAX
27.17
6.60
4.57
0.55
1.010
0.240
0.150
0.015
–T–
SEATING
PLANE
K
E
0.050 BSC
1.27 BSC
M
0.050
0.070
1.27
1.77
F
G
J
K
L
N
E
0.100 BSC
2.54 BSC
0.008
0.110
0.015
0.140
0.21
2.80
0.38
3.55
G
F
J 20 PL
0.300 BSC
7.62 BSC
D 20 PL
0.25 (0.010)
M
M
0.25 (0.010)
T B
M
N
0
15
0
15
0.020
0.040
0.51
1.01
M
M
T
A
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751D–04
ISSUE E
NOTES:
–A–
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
20
11
4. MAXIMUM MOLD PROTRUSION 0.150
(0.006) PER SIDE.
10X P
–B–
5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
M
M
0.010 (0.25)
B
1
10
J
MILLIMETERS
INCHES
20X D
DIM
A
B
C
D
F
G
J
K
M
P
MIN
12.65
7.40
2.35
0.35
0.50
MAX
12.95
7.60
2.65
0.49
0.90
MIN
MAX
0.510
0.299
0.104
0.019
0.035
0.499
0.292
0.093
0.014
0.020
M
S
S
0.010 (0.25)
T
A
B
F
R X 45
1.27 BSC
0.050 BSC
0.25
0.10
0
10.05
0.25
0.32
0.25
7
10.55
0.75
0.010
0.004
0
0.395
0.010
0.012
0.009
7
0.415
0.029
C
SEATING
PLANE
–T–
R
M
18X G
K
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MC74AC373/D
◊
相关型号：
MC74AC374DWCR2
Bus Driver, AC Series, 1-Func, 8-Bit, True Output, CMOS, PDSO20, PLASTIC, SOIC-20
MOTOROLA
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