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參數(shù)資料
| 型號： | 74283 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 4-Bit Binary Adders with Fast Carry |
| 中文描述： | 4，具有快速進位二進制加法器 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 158K |
| 代理商： | 74283 |
Absolute Maximum Ratings
(Note)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM54LS and 54LS
DM74LS
b
55
§
C to
a
125
§
C
0
§
C to
a
70
§
C
b
65
§
C to
a
150
§
C
Storage Temperature Range
Note: The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.
Recommended Operating Conditions
Symbol
Parameter
DM54LS283
DM74LS283
Units
Min
Nom
Max
Min
Nom
Max
V
CC
Supply Voltage
4.5
5
5.5
4.75
5
5.25
V
V
IH
High Level Input Voltage
2
2
V
V
IL
Low Level Input Voltage
0.7
0.8
V
I
OH
High Level Output Current
b
0.4
b
0.4
mA
I
OL
Low Level Output Current
4
8
mA
T
A
Free Air Operating Temperature
b
55
125
0
70
§
C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
V
I
Input Clamp Voltage
V
CC
e
Min, I
I
e b
18 mA
b
1.5
V
V
OH
High Level Output
Voltage
V
CC
e
Min, I
OH
e
Max
V
IL
e
Max, V
IH
e
Min
DM54
2.5
3.4
V
DM74
2.7
3.4
V
OL
Low Level Output
Voltage
V
CC
e
Min, I
OL
e
Max
V
IL
e
Max, V
IH
e
Min
DM54
0.25
0.4
DM74
0.35
0.5
V
I
OL
e
4 mA, V
CC
e
Min
DM74
0.25
0.4
I
I
Input Current
@
Max
Input Voltage
V
CC
e
Max
V
I
e
7V
A, B
0.2
mA
C0
0.1
I
IH
High Level Input
Current
V
CC
e
Max
V
I
e
2.7V
A, B
40
m
A
C0
20
I
IL
Low Level Input
Current
V
CC
e
Max
V
I
e
0.4V
A, B
b
0.8
mA
C0
b
0.4
I
OS
Short Circuit
Output Current
V
CC
e
Max
(Note 2)
DM54
b
20
b
100
mA
DM74
b
20
b
100
I
CC1
Supply Current
V
CC
e
Max (Note 3)
19
34
mA
I
CC2
Note 1:
All typicals are at V
CC
e
5V, T
A
e
25
§
C.
Note 2:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
Supply Current
V
CC
e
Max (Note 4)
22
39
mA
Note 3:
I
CC1
is measured with all outputs open, all B inputs low and all other inputs at 4.5V, or all inputs at 4.5V.
Note 4:
I
CC2
is measured with all outputs open and all inputs grounded.
2
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