MAX489E

±15kV ESD保护、限摆率、低功耗、RS-485/RS-422收发器


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说明

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.
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 放大+

关键特性

  • 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

  • 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

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)
ESD Protect.
(±kV)
Tx ENRx ENICC (Shutdn.)
(µA)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
(°C)
Package/PinsBudgetary
Price
typmintypSee Notes
MAX1487E 1Tx + 1RxHalf50.3250015YesYes-128OpenNo
-40 to +85
0 to +70
PDIP/8
SOIC (N)/8
$2.13 @1k
MAX481E Half0.52500YesYes0.532
PDIP/8
SOIC (N)/8
$2.07 @1k
MAX483E Half0.35250YesYes0.532
PDIP/8
SOIC (N)/8
$2.07 @1k
MAX485E Half0.52500YesYes-32
PDIP/8
SOIC (N)/8
$2.07 @1k
MAX487E Half0.25250YesYes0.5128
PDIP/8
SOIC (N)/8
$2.07 @1k
MAX488E Full0.12250NoNo-32
PDIP/8
SOIC (N)/8
$2.07 @1k
MAX489E Full0.12250YesYes-32
PDIP/14
SOIC (N)/14
$2.12 @1k
MAX490E Full0.32500NoNo-32
PDIP/8
SOIC (N)/8
$2.07 @1k
MAX491E Full0.32500YesYes-32
PDIP/14
SOIC (N)/14
$2.07 @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 4562 RS-232、RS-485接口电路常见问题解答

其它资源

RS-485资源
产品可靠性报告: MAX489E.pdf 
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 4562 RS-232、RS-485接口电路常见问题解答