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±15kV ESD保护、限摆率、低功耗、RS-485/RS-422收发器

产品详情

The MAX481E, MAX483E, MAX485E, MAX487E- MAX491E, and MAX1487E are low-power transceivers for RS-485 and RS-422 communications in harsh environments. Each driver output and receiver input is protected against ±15kV electro-static discharge (ESD) shocks, without latchup. These parts contain one driver and one receiver. The MAX483E, MAX487E, MAX488E, and MAX489E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E are not limited, allowing them to transmit up to 2.5Mbps.

These transceivers draw as little as 120µA supply current when unloaded or when fully loaded with disabled drivers (see Selector Guide). Additionally, the MAX481E, MAX483E, and MAX487E have a low-current shutdown mode in which they consume only 0.5µA. All parts operate from a single +5V supply.

Drivers are short-circuit current limited, and are protected against excessive power dissipation by thermal shutdown circuitry that places their 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 MAX487E and MAX1487E feature quarter-unit-load receiver input impedance, allowing up to 128 transceivers on the bus. The MAX488E-MAX491E are designed for full-duplex communications, while the MAX481E, MAX483E, MAX485E, MAX487E, and MAX1487E are designed for half-duplex applications. For applications that are not ESD sensitive see the pinand function-compatible MAX481, MAX483, MAX485, MAX487-MAX491, and MAX1487.

主要特征

  • For Fault-Tolerant Applications:
    MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4- Unit Load, +3.3V, RS-485 Transceiver MAX3080-MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited, RS-485/RS-422 Transceivers
  • For Space-Constrained Applications:
    MAX3460-MAX3464: +5V, Fail-Safe, 20Mbps, Profibus, RS-485/RS-422 Transceivers MAX3362: +3.3V, High-Speed, RS-485/RS-422 Transceiver in a SOT23 Package MAX3280E-MAX3284E: ±15kV ESD-Protected, 52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422 True Fail-Safe Receivers MAX3030E-MAX3033E: ±15kV ESD-Protected, +3.3V, Quad RS-422 Transmitters
  • For Multiple Transceiver Applications:
    MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V, SOT23, RS-485/RS-422 Transmitters
  • For Fail-Safe Applications:
    MAX3440E-MAX3444E: ±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers
  • For Low-Voltage Applications:
    MAX3483E/MAX3485E/MAX3486E/MAX3488E/ MAX3490E/MAX3491E: +3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited, True RS-485/RS-422 Transceivers

应用/用途

  • 工业控制局域网
  • 电平转换器
  • 低功耗RS-422收发器
  • 低功耗RS-485收发器
  • 用于EMI敏感应用的收发器

简化框图

MAX1487E、MAX481E、MAX483E、MAX485E、MAX487E、MAX488E、MAX489E、MAX490E、MAX491E:引脚配置和典型工作电路 MAX1487E、MAX481E、MAX483E、MAX485E、MAX487E、MAX488E、MAX489E、MAX490E、MAX491E:引脚配置和典型工作电路 Zoom icon

技术文档

设计与质量

单击下面的标题以查看详情页面

其他资源
RS-485资源
/cn/design/design-tools/ee-sim.html?

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参量

Parametric specs for RS-485/RS-422 Line Driver/Receivers
# Tx/Rx 1Tx + 1Rx
Duplex Full
VSUPPLY (V) 5
Data Rate (kbps) (min) 250
ICC (mA) (typ) 0.12
ESD Protect. (±kV) 15
Tx EN Yes
Rx EN Yes
ICC (Shutdn.) (µA) (typ) -
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins PDIP/14
SOIC (N)/14
Budgetary
Price (See Notes)
$2.12 @1k

主要特征

  • For Fault-Tolerant Applications:
    MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4- Unit Load, +3.3V, RS-485 Transceiver MAX3080-MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited, RS-485/RS-422 Transceivers
  • For Space-Constrained Applications:
    MAX3460-MAX3464: +5V, Fail-Safe, 20Mbps, Profibus, RS-485/RS-422 Transceivers MAX3362: +3.3V, High-Speed, RS-485/RS-422 Transceiver in a SOT23 Package MAX3280E-MAX3284E: ±15kV ESD-Protected, 52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422 True Fail-Safe Receivers MAX3030E-MAX3033E: ±15kV ESD-Protected, +3.3V, Quad RS-422 Transmitters
  • For Multiple Transceiver Applications:
    MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V, SOT23, RS-485/RS-422 Transmitters
  • For Fail-Safe Applications:
    MAX3440E-MAX3444E: ±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers
  • For Low-Voltage Applications:
    MAX3483E/MAX3485E/MAX3486E/MAX3488E/ MAX3490E/MAX3491E: +3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited, True RS-485/RS-422 Transceivers

应用/用途

  • 工业控制局域网
  • 电平转换器
  • 低功耗RS-422收发器
  • 低功耗RS-485收发器
  • 用于EMI敏感应用的收发器

描述

The MAX481E, MAX483E, MAX485E, MAX487E- MAX491E, and MAX1487E are low-power transceivers for RS-485 and RS-422 communications in harsh environments. Each driver output and receiver input is protected against ±15kV electro-static discharge (ESD) shocks, without latchup. These parts contain one driver and one receiver. The MAX483E, MAX487E, MAX488E, and MAX489E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E are not limited, allowing them to transmit up to 2.5Mbps.

These transceivers draw as little as 120µA supply current when unloaded or when fully loaded with disabled drivers (see Selector Guide). Additionally, the MAX481E, MAX483E, and MAX487E have a low-current shutdown mode in which they consume only 0.5µA. All parts operate from a single +5V supply.

Drivers are short-circuit current limited, and are protected against excessive power dissipation by thermal shutdown circuitry that places their 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 MAX487E and MAX1487E feature quarter-unit-load receiver input impedance, allowing up to 128 transceivers on the bus. The MAX488E-MAX491E are designed for full-duplex communications, while the MAX481E, MAX483E, MAX485E, MAX487E, and MAX1487E are designed for half-duplex applications. For applications that are not ESD sensitive see the pinand function-compatible MAX481, MAX483, MAX485, MAX487-MAX491, and MAX1487.

简化框图

MAX1487E、MAX481E、MAX483E、MAX485E、MAX487E、MAX488E、MAX489E、MAX490E、MAX491E:引脚配置和典型工作电路 MAX1487E、MAX481E、MAX483E、MAX485E、MAX487E、MAX488E、MAX489E、MAX490E、MAX491E:引脚配置和典型工作电路 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索您所需的答案。

过滤搜索

Maxim专业的应用工程师团队也可以为您解答技术问题,请 访问Maxim的 支持中心