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參數(shù)資料
| 型號： | MC75174BP |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | QUAD EIA-485 LINE DRIVERS |
| 中文描述： | QUAD LINE DRIVER, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 180K |
| 代理商： | MC75174BP |
MC75172B MC75174B
10
MOTOROLA ANALOG IC DEVICE DATA
Figure 18. Typical EIA–485 System
NOTES:
1.Terminating resistors RT must be located at the physical ends of the cable.
2.Stubs should be as short as possible.
3.Circuit ground of all drivers and receivers must be connected via a dedicated wire within the cable.
Do not rely on chassis ground or power line ground.
#8
TTL
R
TTL
TTL
#3
TTL
R
En
#2
TTL
TTL
En
TTL
R
TTL
#1
R
TTL
RT
#1
En
D
#3
D
#5
D
TTL
En
#6
R
TTL
R
En
#5
R
#6
D
#7
RT
TTL
TTL
R
En
TTL
#4
D
5 “off” drivers (@ 0.06 U.L. each),
+8 receivers (@ 1.0 U.L. each) = 8.3 Unit Loads
RT = 120
at each end of the cable.
#4
D
#2
120
Twisted
Pair
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