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參數資料
| 型號： | MAX3080EESD |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 【15kVESD-Protected,Fail-Safe,High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers |
| 中文描述： | LINE TRANSCEIVER, PDSO14 |
| 封裝： | SO-14 |
| 文件頁數： | 19/21頁 |
| 文件大?。?/td> | 319K |
| 代理商： | MAX3080EESD |
Driver Output Protection
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus con-
tention. The first, a foldback current limit on the output
stage, provides immediate protection against short cir-
cuits over the whole common-mode voltage range (see
Typical Operating Characteristics
). The second, a ther-
mal shutdown circuit, forces the driver outputs into a
high-impedance state if the die temperature becomes
excessive.
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, use
the repeater application shown in Figure 18.
Figures 19, 20, and 21 show the system differential volt-
age for the parts driving 4000 feet of 26AWG twisted-
pair wire at 110kHz into 120
loads.
Typical Applications
The MAX3082E/MAX3085E/MAX3088E/MAX3089E
transceivers are designed for bidirectional data com-
munications on multipoint bus transmission lines.
Figures 22 and 23 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 18.
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
possible. The slew-rate-limited MAX3082E/MAX3085E,
and the two modes of the MAX3089E, are more tolerant
of imperfect termination.
M
±15kVESD-Protected,Fail-Safe,High-Speed(10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
______________________________________________________________________________________
19
2
μ
s/div
V
A
- V
B
DI
RO
1V/div
5V/div
5V/div
MAX3080/3089 FIG-19
Figure 20. MAX3083E/MAX3084E/MAX3085E, and MAX3089E
with SRL = V
CC,
System Differential Voltage at 50kHz Driving
4000ft of Cable
1
μ
s/div
V
A
- V
B
DI
RO
1V/div
5V/div
5V/div
MAX3080/3089 FIG-20
Figure 21. MAX3086E/MAX3087E/MAX3088E, and MAX3089E
with SRL = GND, System Differential Voltage at 200kHz Driving
4000ft of Cable
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
MAX3082E
MAX3085E
MAX3088E
MAX3089E (HALF-DUPLEX)
Figure 22. Typical Half-Duplex RS-485 Network
相關PDF資料 |
PDF描述 |
|---|---|
| MAX3085E | 【15kVESD-Protected,Fail-Safe,High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers |
| MAX3087E | Floating-Point Digital Signal Processors 272-BGA |
| MAX3093ECPE | Replaced by TMS320C6727B : Floating-Point Digital Signal Processor 256-BGA |
| MAX3094E | 【15kV ESD-Protected, 10Mbps, 3V/5V, Low-Power Quad RS-422/RS-485 Receivers |
| MAX3093EESE | 【15kV ESD-Protected, 10Mbps, 3V/5V, Low-Power Quad RS-422/RS-485 Receivers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX3080EESD+ | 功能描述:RS-422/RS-485 接口 IC Fail-Safe 10Mbps RS-485/RS-422 Tcvr RoHS:否 制造商:Maxim Integrated 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3080EESD+ | 制造商:Maxim Integrated Products 功能描述:TRANSCEIVER IC |
| MAX3080EESD+T | 功能描述:RS-422/RS-485 接口 IC Fail-Safe 10Mbps RS-485/RS-422 Tcvr RoHS:否 制造商:Maxim Integrated 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3080EESD-T | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3080EPD | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
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