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參數(shù)資料
| 型號(hào)： | 74LS |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | Decade and Binary Counters |
| 中文描述： | 十年和二進(jìn)制計(jì)數(shù)器 |
| 文件頁(yè)數(shù)： | 4/10頁(yè) |
| 文件大?。?/td> | 146K |
| 代理商： | 74LS |
Recommended Operating Conditions
Symbol
Parameter
DM74LS93
Units
Min
Nom
Max
V
CC
Supply Voltage
4.75
5
5.25
V
V
IH
High Level Input Voltage
2
V
V
IL
Low Level Input Voltage
0.8
V
I
OH
High Level Output Current
b
0.4
mA
I
OL
Low Level Output Current
8
mA
f
CLK
Clock Frequency (Note 1)
A to Q
A
0
32
B to Q
B
0
16
MHz
f
CLK
Clock Frequency (Note 2)
A to Q
A
0
20
B to Q
B
0
10
t
W
Pulse Width (Note 1)
A
15
B
30
ns
Reset
15
t
W
Pulse Width (Note 2)
A
25
B
50
ns
Reset
25
t
REL
Reset Release Time (Note 1)
25
ns
t
REL
Reset Release Time (Note 2)
35
ns
T
A
Free Air Operating Temperature
0
70
§
C
Note 1:
C
L
e
15 pF, R
L
e
2 k
X
, T
A
e
25
§
C and V
CC
e
5V.
Note 2:
C
L
e
50 pF, R
L
e
2 k
X
, T
A
e
25
§
C and V
CC
e
5V.
’LS93 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
2.7
3.4
V
V
OL
Low Level Output
Voltage
V
CC
e
Min, I
OL
e
Max
V
IL
e
Max, V
IH
e
Min
(Note 4)
0.35
0.5
V
I
OL
e
4 mA, V
CC
e
Min
0.25
0.4
I
I
Input Current
@
Max
Input Voltage
V
CC
e
Max, V
I
e
7V
Reset
0.1
V
CC
e
Max
V
I
e
5.5V
A
0.2
mA
B
0.4
I
IH
High Level Input
Current
V
CC
e
Max
V
I
e
2.7V
Reset
20
A
40
m
A
B
80
4
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