MAX3480A

完备的、隔离型、3.3V、RS-485/RS-422数据接口


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说明

The MAX3480A/MAX3480B are electrically isolated RS-485/RS-422 data-communications interfaces. Transceivers, optocouplers, and a transformer are all included in one low-cost, 28-pin DIP package. A single +3.3V supply on the logic side powers both sides of the interface.

The MAX3480B features reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX3480A's driver slew rate is not limited, allowing transmission rates up to 2.5Mbps.

These devices typically draw 180mA of quiescent supply current. The MAX3480B provides a low-power shutdown mode in which it consumes only 0.2µA.

Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.

The MAX3480A/MAX3480B typically withstand 1600VRMS (1 minute) or 2000VRMS (1 second). Their isolated inputs and outputs meet RS-485/RS-422 specifications.

MAX3480A、MAX3480B:引脚配置 MAX3480A、MAX3480B:引脚配置 放大+

关键特性

  • Isolated Data Interface to 1600VRMS (1 minute)
  • Slew-Rate-Limited Data Transmission (MAX3480B)
  • High-Speed, Isolated, 2.5Mbps RS-485 Interface (MAX3480A)
  • -7V to +12V Common-Mode Input Voltage Range with Respect to Isolated Ground
  • Single +3.3V Supply
  • Current Limiting and Thermal Shutdown for Driver Overload Protection
  • Standard 28-Pin DIP Package

应用

  • 自动测试设备(ATE)
  • HVAC/楼宇控制网络
  • 工业控制局域网
  • 隔离型RS-485/RS-422数据接口
  • 用于EMI敏感应用的收发器

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


Part NumberTx/RxDuplexVSUPPLY
(V)
Galvanic Isolation
(±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
MAX3480A 1Tx + 1RxHalf3.310001802500YesNo0.232OpenNo
-40 to +85
0 to +70
PDIP HYBRID/28
$20.40 @1k
MAX3480B 120250128
PDIP HYBRID/28
$20.62 @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。
申请可靠性报告: MAX3480A 
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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