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參數(shù)資料
| 型號： | MAX490MJA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers |
| 中文描述： | LINE TRANSCEIVER, CDIP8 |
| 封裝： | CERAMIC, DIP-8 |
| 文件頁數(shù)： | 13/19頁 |
| 文件大?。?/td> | 439K |
| 代理商： | MAX490MJA |
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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX490MJA/883B | 制造商:Maxim Integrated Products 功能描述:SLEW-RATE LIMITED, LOW-POWER RS-485 TRANCEIVERS - Rail/Tube 制造商:Maxim Integrated Products 功能描述:STEP-DOWN DC-DC CONVERTERS |
| MAX490MSA/PR | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX490MSA/PR-T | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX4910ETE+ | 功能描述:模擬開關(guān) IC Quad-SPDT Clickless Audio Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| MAX4910ETE+T | 功能描述:模擬開關(guān) IC Quad-SPDT Clickless Audio Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
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