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參數(shù)資料
| 型號(hào)： | IN74LS157 |
| 廠商： | INTEGRAL JOINT STOCK COMPANY |
| 英文描述： | Quad 2-Input Data Selector/Multiplexer |
| 中文描述： | 四2輸入數(shù)據(jù)選擇器/復(fù)用器 |
| 文件頁數(shù)： | 2/3頁 |
| 文件大?。?/td> | 144K |
| 代理商： | IN74LS157 |
IN74LS157
2
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
V
CC
V
IN
V
OUT
Tstg
Supply Voltage
7.0
V
Input Voltage
7.0
V
Output Voltage
5.5
V
°
C
Storage Temperature Range
-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
Max
Unit
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
4.75
5.25
V
High Level Input Voltage
2.0
V
Low Level Input Voltage
0.8
V
High Level Output Current
-0.4
mA
Low Level Output Current
8.0
mA
°
C
Ambient Temperature Range
0
+70
DC ELECTRICAL CHARACTERISTICS
over full operating conditions
Guaranteed Limit
Min
Symbol
Parameter
Test Conditions
Max
Unit
V
IK
V
OH
V
OL
Input Clamp Voltage
V
CC
= min, I
IN
= -18 mA
V
CC
= min, I
OH
= -0.4 mA
V
CC
= min, I
OL
= 4 mA
V
CC
= min, I
OL
= 8 mA
V
CC
= max
-1.5
V
High Level Output Voltage
2.7
V
Low Level Output Voltage
0.4
V
0.5
I
IH
High Level Input Current
for pins 1,15
40
μ
A
V
IN
= 2.7 V
V
CC
= max
V
IN
= 7.0 V
V
CC
= max
V
IN
= 0.4 V
V
CC
= max, V
O
= 0 V
(Note 1)
A or B input
20
for pins 1,15
0.2
mA
A or B input
0.1
I
IL
Low Level Input Current
for pins 1,15
-0.8
mA
A or B input
-0.4
I
O
Output Short Circuit Current
-20
-100
mA
I
CC
Supply Current
V
CC
= max (Note 2)
16
mA
Note 1: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 2: I
CC
is measured with all outputs open, and 4.5 V applied to all inputs.
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