參數(shù)資料
型號(hào)： 74245
廠商： Fairchild Semiconductor Corporation
英文描述： 3-STATE Octal Bus Transceiver
中文描述： 三態(tài)八路總線收發(fā)器
文件頁(yè)數(shù)： 2/6頁(yè)
文件大?。?/td> 66K
代理商： 74245
www.fairchildsemi.com
2
D
Absolute Maximum Ratings
(Note 1)
Note 1:
The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 2:
All typicals are at V
CC
=
5V, T
A
=
25
°
C.
Note 3:
Not more than one output should be shorted at a time, not to exceed one second duration
Supply Voltage
Input Voltage
DIR or G
A or B
Operating Free Air Temperature Range
Storage Temperature Range
7V
7V
5.5V
0
°
C to
+
70
°
C
65
°
C to
+
150
°
C
Symbol
Parameter
Min
4.75
2
Nom
5
Max
5.25
Units
V
V
V
mA
mA
°
C
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
0.8
15
24
70
0
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 2)
V
I
HYS
Input Clamp Voltage
Hysteresis (V
T
+
V
T
)
HIGH Level
Output Voltage
V
CC
=
Min, I
I
=
18 mA
V
CC
=
Min
V
CC
=
Min, V
IH
=
Min
V
IL
=
Max, I
OH
=
1 mA
V
CC
=
Min, V
IL
=
Min
V
IL
=
Max, I
OH
=
3 mA
V
CC
=
Min, V
IH
=
Min
V
IL
=
0.5V, I
OH
=
Max
V
CC
=
Min
V
IL
=
Max
V
IH
=
Min
V
CC
=
Max
V
IL
=
Max
V
IH
=
Min
1.5
V
V
0.2
0.4
V
OH
2.7
2.4
3.4
V
2
V
OL
LOW Level
Output Voltage
I
OL
=
12 mA
0.4
I
OL
=
Max
0.5
V
I
OZH
Off-State Output Current,
HIGH Level Voltage Applied
Off-State Output Current,
V
O
=
2.7V
20
μ
A
I
OZL
V
O
=
0.4V
200
μ
A
LOW Level Voltage Applied
Input Current at Maximum
I
I
V
CC
=
Max
A or B
V
I
=
5.5V
V
I
=
7V
0.1
mA
Input Voltage
HIGH Level Input Current
LOW Level Input Current
DIR or G
0.1
20
0.2
225
70
90
I
IH
I
IL
I
OS
I
CC
V
CC
=
Max, V
I
=
2.7V
V
CC
=
Max, V
I
=
0.4V
V
CC
=
Max (Note 3)
Outputs HIGH
Outputs LOW
μ
A
mA
Short Circuit Output Current
Supply Current
40
mA
V
CC
=
Max
48
62
mA
Outputs at Hi-Z
64
95
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