MAX481E:±15kV ESD保护、限摆率、低功耗、RS-485/RS-422收发器

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.

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
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
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
数据手册DataSheet
语言下载文件备注
英文MAX1487E-MAX491E.pdfRev 4; 03/2004
关键参数
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
MAX1487E1Tx + 1RxHalf50.3250015YesYes-128OpenNo
  • -40 to +85
  • 0 to +70
  • µMAX/8
  • PDIP(N)/8
  • SOIC(N)/8
$1.97 @1k
MAX481EHalf0.52500YesYes0.532
  • µMAX/8
  • PDIP(N)/8
  • SOIC(N)/8
MAX483EHalf0.35250YesYes0.532
  • µMAX/8
  • PDIP(N)/8
  • SOIC(N)/8
MAX485EHalf0.52500YesYes-32
  • µMAX/8
  • PDIP(N)/8
  • SOIC(N)/8
MAX487EHalf0.25250YesYes0.5128
  • µMAX/8
  • PDIP(N)/8
  • SOIC(N)/8
MAX488EFull0.12250NoNo-32
  • µMAX/8
  • PDIP(N)/8
  • SOIC(N)/8
MAX489EFull0.12250YesYes-32
  • PDIP(N)/14
  • SOIC(N)/14
MAX490EFull0.32500NoNo-32
  • µMAX/8
  • PDIP(N)/8
  • SOIC(N)/8
MAX491EFull0.32500YesYes-32
  • PDIP(N)/14
  • SOIC(N)/14
技术资料
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX481ECPA停止供货MAX481ECPA+PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:否
MAX481ECPA+生产中PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:无铅
MAX481ECSA停止供货MAX481ECSA+SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:否
MAX481ECSA+生产中SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:无铅
MAX481ECSA+T生产中SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:无铅
MAX481ECSA-T停止供货MAX481ECSA+TN.SO;8引脚0°C至+70°C参考数据资料
MAX481ECUA停止供货µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:否
MAX481ECUA-T停止供货µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:否
MAX481EEPA停止供货MAX481EEPA+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
MAX481EEPA+生产中PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:无铅
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX481EESA停止供货MAX481EESA+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX481EESA+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX481EESA+T生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX481EESA-T停止供货MAX481EESA+TSOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX481EESA/GH9停止供货MAX481EESA+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX481EESA/GH9-T停止供货MAX481EESA+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX1487E-MAX491E.pdf MAX491E
Explanation of Maxim RS-485 Features MAX489
MAX1487E-MAX491E.pdf MAX491E