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參數(shù)資料
| 型號： | MAX4840 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Overvoltage Protection Controllers with Status FLAG |
| 中文描述： | 過壓保護控制器，帶有狀態(tài)標示FLAG |
| 文件頁數(shù)： | 13/19頁 |
| 文件大小： | 439K |
| 代理商： | MAX4840 |
Line Length vs. Data Rate
The RS-485/RS-422 standard covers line lengths up to
4000 feet. For line lengths greater than 4000 feet, see
Figure 23.
Figures 19 and 20 show the system differential voltage
for the parts driving 4000 feet of 26AWG twisted-pair
wire at 110kHz into 120
loads.
Typical Applications
The MAX481, MAX483, MAX485, MAX487–MAX491, and
MAX1487 transceivers are designed for bidirectional data
communications on multipoint bus transmission lines.
Figures 21 and 22 show typical network applications
circuits. These parts can also be used as line
repeaters, with cable lengths longer than 4000 feet, as
shown in Figure 23.
To minimize reflections, the line should be terminated at
both ends in its characteristic impedance, and stub
lengths off the main line should be kept as short as possi-
ble. The slew-rate-limited MAX483 and MAX487–MAX489
are more tolerant of imperfect termination.
M
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
______________________________________________________________________________________
13
DI
V
Y
-V
Z
RO
5V
0V
1V
0V
-1V
5V
0V
2
μ
s/div
DI
V
Y
-V
Z
RO
5V
0V
1V
0V
-1V
5V
0V
2
μ
s/div
DI
RO
DE
RE
A
B
RE
RE
RE
RO
RO
RO
DI
DI
DI
DE
DE
DE
D
D
D
R
R
R
B
B
B
A
A
A
120
120
D
R
MAX481
MAX483
MAX485
MAX487
MAX1487
Figure 19. MAX481/MAX485/MAX490/MAX491/MAX1487 System
Differential Voltage at 110kHz Driving 4000ft of Cable
Figure 20. MAX483, MAX487–MAX489 System Differential
Voltage at 110kHz Driving 4000ft of Cable
Figure 21. MAX481/MAX483/MAX485/MAX487/MAX1487 Typical Half-Duplex RS-485 Network
相關PDF資料 |
PDF描述 |
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| MAX4841 | Overvoltage Protection Controllers with Status FLAG |
| MAX490ECPA | 【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers |
| MAX490ECSA | 【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers |
| MAX490EEPA | 【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers |
| MAX490EESA | 【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4840AELT+ | 制造商:Maxim Integrated Products 功能描述:OVERVOLT PROT CNTRLR 6PIN UDFN - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX4840AELT+T | 功能描述:電流和電力監(jiān)控器、調節(jié)器 Overvoltage Protect Ctlr w/Status FLAG RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX4840AEXT+ | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:OVERVOLT PROT CNTRLR 6PIN SC-70 - Rail/Tube 制造商:Maxim Integrated Products 功能描述:OVERVOLTAGE PROTECTION CONTROLLERS WITH |
| MAX4840AEXT+T | 功能描述:電流和電力監(jiān)控器、調節(jié)器 Overvoltage Protect Ctlr w/Status FLAG RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX4840EXT | 制造商:Maxim Integrated Products 功能描述:OVERVOLTAGE PROTECTION CONTROLLERS - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
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