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參數(shù)資料
| 型號(hào)： | 74LS194A |
| 廠(chǎng)商： | National Semiconductor Corporation |
| 英文描述： | 4-Bit Bidirectional Universal Shift Register |
| 中文描述： | 4位雙向通用移位寄存器 |
| 文件頁(yè)數(shù)： | 2/8頁(yè) |
| 文件大?。?/td> | 166K |
| 代理商： | 74LS194A |
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
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
54LS194A
DM74LS194A
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
f
CLK
Clock Frequency (Note 1)
30
0
0
25
MHz
Clock Frequency (Note 2)
22
0
20
t
W
Pulse Width
(Note 3)
Clock
17
20
ns
Clear
12
20
t
SU
Setup Time
(Note 3)
Mode
25
30
ns
Data
16
20
t
H
Hold Time (Note 3)
0
0
ns
t
REL
Clear Release Time (Note 3)
18
25
ns
§
C
T
A
Note 1:
C
L
e
15 pF, 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.
Note 3:
T
A
e
25
§
C and V
CC
e
5V.
Free Air Operating Temperature
b
55
125
0
70
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 4)
V
I
Input Clamp Voltage
V
CC
e
Min, I
I
e b
18 mA
V
CC
e
Min, I
OH
e
Max
V
IL
e
Max, V
IH
e
Min
V
CC
e
Min, I
OL
e
Max
V
IL
e
Max, V
IH
e
Min
b
1.5
V
V
OH
High Level Output
Voltage
54LS
2.5
V
DM74
2.7
3.4
V
OL
Low Level Output
Voltage
54LS
0.4
DM74
0.35
0.5
V
I
OL
e
4 mA, V
CC
e
Min
V
CC
e
Max, V
I
e
7V
0.4
I
I
Input Current
@
Max
Input Voltage
0.1
mA
I
IH
High Level Input Current
V
CC
e
Max, V
I
e
2.7V
V
CC
e
Max, V
I
e
0.4V
V
CC
e
Max
(Note 5)
20
m
A
I
IL
Low Level Input Current
b
0.4
mA
I
OS
Short Circuit
Output Current
54LS
b
20
b
100
mA
DM74
b
20
b
100
I
CC
Note 4:
All typicals are at V
CC
e
5V, T
A
e
25
§
C.
Note 5:
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 6)
15
23
mA
Note 6:
With all outputs open, inputs A through D grounded, and 4.5V applied to S0, S1, CLEAR, and the serial inputs, I
CC
is tested with momentary ground, then
4.5V applied to CLOCK.
2
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|---|---|
| 74LS194ADC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| 74LS194PC | 制造商:Texas Instruments 功能描述: |
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