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54HC245 PDF预览

54HC245

更新时间: 2024-09-17 06:29:55
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 总线收发器
页数 文件大小 规格书
7页 179K
描述
Octal Bus Transceiver

54HC245 数据手册

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MC74VHC245  
MAXIMUM RATINGS*  
Symbol  
Parameter  
Value  
Unit  
V
This device contains protection  
circuitry to guard against damage  
due to high static voltages or electric  
fields. However, precautions must  
be taken to avoid applications of any  
voltage higher than maximum rated  
voltages to this high–impedance cir-  
V
DC Supply Voltage  
DC Input Voltage  
– 0.5 to + 7.0  
– 0.5 to + 7.0  
CC  
V
V
in  
V
DC Output Voltage  
Input Diode Current  
Output Diode Current  
– 0.5 to V  
CC  
+ 0.5  
V
out  
I
IK  
– 20  
mA  
mA  
mA  
mA  
mW  
cuit. For proper operation, V and  
in  
I
± 20  
± 25  
± 75  
OK  
V
should be constrained to the  
out  
range GND (V or V  
)
V
.
I
DC Output Current, per Pin  
DC Supply Current, V and GND Pins  
in out  
CC  
out  
CC  
Unused inputs must always be  
tied to an appropriate logic voltage  
I
CC  
level (e.g., either GND or V  
).  
P
D
Power Dissipation in Still Air  
SOIC Packages†  
TSSOP Package†  
500  
450  
CC  
Unused outputs must be left open.  
T
stg  
Storage Temperature  
– 65 to + 150  
C
* Absolute maximum continuous ratings are those values beyond which damage to the device  
may occur. Exposure to these conditions or conditions beyond those indicated may adversely  
affect device reliability. Functional operation under absolute–maximum–rated conditions is not  
implied.  
†Derating — SOIC Packages: – 7 mW/ C from 65 to 125 C  
TSSOP Package: – 6.1 mW/ C from 65 to 125 C  
RECOMMENDED OPERATING CONDITIONS  
Symbol  
Parameter  
Min  
2.0  
0
Max  
5.5  
Unit  
V
V
CC  
DC Supply Voltage  
DC Input Voltage  
DC Output Voltage  
V
in  
5.5  
V
V
out  
0
V
CC  
V
T
Operating Temperature  
Input Rise and Fall Time  
– 40  
+ 85  
C
A
t , t  
r f  
V
V
= 3.3V ±0.3V  
=5.0V ±0.5V  
0
0
100  
20  
ns/V  
CC  
CC  
DC ELECTRICAL CHARACTERISTICS  
T
A
= 25°C  
T = – 40 to 85°C  
A
V
CC  
V
Symbol  
Parameter  
Test Conditions  
Unit  
Min  
1.50  
Typ  
Max  
Min  
Max  
V
IH  
Minimum High–Level  
Input Voltage  
2.0  
3.0 to  
5.5  
1.50  
V
V
x 0.7  
V
x 0.7  
CC  
CC  
V
Maximum Low–Level  
Input Voltage  
2.0  
3.0 to  
5.5  
0.50  
0.50  
V
V
IL  
V
x 0.3  
V
x 0.3  
CC  
CC  
V
OH  
Minimum High–Level  
Output Voltage  
V
= V or V  
IH  
2.0  
3.0  
4.5  
1.9  
2.9  
4.4  
2.0  
3.0  
4.5  
1.9  
2.9  
4.4  
in  
IL  
IL  
I
= – 50µA  
OH  
V
in  
= V or V  
IH  
I
I
= – 4mA  
3.0  
4.5  
2.58  
3.94  
2.48  
3.80  
OH  
OH  
= – 8mA  
V
OL  
Maximum Low–Level  
Output Voltage  
V
= V or V  
IH IL  
= 50µA  
2.0  
3.0  
4.5  
0.0  
0.0  
0.0  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
V
in  
I
OL  
V
in  
= V or V  
IH  
IL  
I
I
= 4mA  
= 8mA  
3.0  
4.5  
0.36  
0.36  
0.44  
0.44  
OL  
OL  
I
in  
Maximum Input  
Leakage Current  
V
= 5.5 V or GND  
0 to 5.5  
± 0.1  
± 1.0  
µA  
in  
(DIR, OE)  
MOTOROLA  
2

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