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參數(shù)資料
| 型號(hào)： | 74157 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Quad 2-Line to 1-Line Data Selectors/Multiplexers |
| 中文描述： | 四2線1線數(shù)據(jù)選擇器/多路復(fù)用器 |
| 文件頁(yè)數(shù)： | 2/6頁(yè) |
| 文件大小： | 118K |
| 代理商： | 74157 |
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
5.5V
Operating Free Air Temperature Range
DM54 and 54
DM74
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
DM54157
DM74157
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
0.8
0.8
V
I
OH
High Level Output Current
b
0.8
b
0.8
mA
I
OL
Low Level Output Current
16
16
mA
§
C
T
A
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 1)
V
I
Input Clamp Voltage
V
CC
e
Min, I
I
e b
12 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
IH
e
Min, V
IL
e
Max
V
CC
e
Max, V
I
e
5.5V
b
1.5
V
V
OH
High Level Output
Voltage
2.4
3.4
V
V
OL
Low Level Output
Voltage
0.4
V
I
I
Input Current
@
Max
Input Voltage
1
mA
I
IH
High Level Input Current
V
CC
e
Max, V
I
e
2.4V
V
CC
e
Max, V
I
e
0.4V
V
CC
e
Max
(Note 2)
40
m
A
I
IL
Low Level Input Current
b
1.6
mA
I
OS
Short Circuit
Output Current
DM54
b
20
b
55
mA
DM74
b
18
b
55
I
CC
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.
Supply Current
V
CC
e
Max (Note 3)
30
48
mA
Note 3:
I
CC
is measured with 4.5V applied to all inputs and all outputs open.
2
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| 74157 WAF | 制造商:Texas Instruments 功能描述: |
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| 74158 | 功能描述:BIT POWER PHILLIPS #0 2.00" 制造商:wiha 系列:- 零件狀態(tài):在售 工具類型:刀頭，電動(dòng) 尖頭 - 類型:十字 尖頭 - 尺寸:#0 驅(qū)動(dòng)器大小:1/4" 長(zhǎng)度 - 總:2.00"（50.8mm） 特性:防撞擊 數(shù)量:2 重量:- 標(biāo)準(zhǔn)包裝:1 |
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