MAX3291

RS-485/RS-422收发器,带有预加重,用于高速、远距离通信


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说明

The MAX3291/MAX3292 high-speed RS-485/RS-422 transceivers feature driver preemphasis circuitry, which extends the distance and increases the data rate of reliable communication by reducing intersymbol interference (ISI) caused by long cables. The MAX3291 is programmable for data rates of 5Mbps to 10Mbps, while the MAX3292 is programmable for data rates up to 10Mbps by using a single external resistor.

The MAX3291/MAX3292 are full-duplex devices that operate from a single +5V supply and offer a low-current shutdown mode that reduces supply current to 100nA. They feature driver output short-circuit current limiting and a fail-safe receiver input that guarantees a logic-high output if the input is open circuit. A 1/4-unit-load receiver input impedance allows up to 128 transceivers on the bus.
MAX3291、MAX3292:典型工作电路 MAX3291、MAX3292:典型工作电路 放大+

关键特性

  • Preemphasis Increases the Distance and Data Rate of Reliable RS-485/RS-422 Communication
  • Data Rate
    • Optimized for 5Mbps to 10Mbps (MAX3291)
    • Programmable up to 10Mbps (MAX3292)
  • 100nA Low-Current Shutdown Mode
  • Allow Up to 128 Transceivers on the Bus
  • -7V to +12V Common-Mode Input Voltage Range
  • Pin-Compatible with '75180, MAX489, MAX491 MAX3080, MAX3083, MAX3086, MAX1482

应用

  • 工业控制局域网
  • 远距离、高速RS-485/RS-422通信
  • 电信

请查看具体的参数规格 RS-485/RS-422 Line Driver/Receivers (208)


Part NumberTx/RxDuplexVSUPPLY
(V)
ICC
(mA)
Data Rate
(kbps)
Tx ENRx ENICC (Shutdn.)
(µA)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
(°C)
Package/PinsBudgetary
Price
typmintypSee Notes
MAX3291 1Tx + 1RxFull5210000YesYes0.1128OpenNo
-40 to +85
0 to +70
PDIP/14
SOIC (N)/14
$4.33 @1k
MAX3292 
PDIP/14
SOIC (N)/14
$5.08 @1k

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

技术资料

应用笔记 643 Preemphasis Improves RS-485 Communications
申请可靠性报告: MAX3291 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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类型 编号 标题
应用笔记 643 Preemphasis Improves RS-485 Communications