MAX1485:软件可选的、半/全双工、限摆率、12Mbps、RS-485/RS-422收发器,µMAX封装

The MAX1481/MAX1484/MAX1485/MAX1486 provide software-selectable, half-/full-duplex, low-power, slew-rate- limited, and high-speed (12Mbps) RS-485/RS-422 operation in a 10-pin µMAX® package—the smallest 10-pin package available. The software-selectable, half-/full-duplex MAX1485/MAX1486 make obsolete the normally larger and more expensive solutions required for selectable half-/full-duplex RS-485/RS-422 operation: 1) a 14-pin, full-duplex transceiver configured via jumpers between receiver and transmitter lines, or 2) two 8-pin, half-duplex transceivers, which require an additional inverter logic gate for software selectability. The MAX1481/MAX1484 are functionally equivalent to the industry-standard MAX491 and 75180, and are designed for space-constrained, full-duplex RS-422 applications. All parts contain one driver and one receiver and feature a 1/8-unit-load receiver input impedance, allowing up to 256 transceivers on the bus. The MAX1481/MAX1485 feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The MAX1484/MAX1486 driver slew rates are not limited, allowing them to transmit up to 12Mbps. The MAX1481/MAX1484/MAX1485/MAX1486 draw only 300µA of supply current. The MAX1481 has a low-power shutdown mode that reduces supply current to only 0.1µA. All devices operate from a single 5V supply. Drivers are output 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.

关键特性
  • 10-Pin µMAX Package: Smallest 10-Pin Package
  • Software-Selectable Half-/Full-Duplex Operation (MAX1485/MAX1486)
  • 0.1µA Low-Current Shutdown Mode (MAX1481)
  • Slew-Rate Limiting Allows Error-Free Data Transmission (MAX1481/MAX1485)
  • 12Mbps High-Speed Operation (MAX1484/MAX1486)
  • Allow up to 256 Transceivers on the Bus
MAX1481、MAX1484:引脚配置
MAX1481、MAX1484:引脚配置
应用
  • 电池供电应用
  • 手持式装置
  • 工业控制局域网
  • 电平转换器
  • 低功耗RS-422/RS-485通信
  • 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MAX1481-MAX1486.pdfRev 1; 12/2006
关键参数
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
MAX14811Tx + 1RxFull50.3250YesYes0.1256NoneNo-40 to +85µMAX/10$1.52 @1k
MAX1484Full12000Yes-µMAX/10
MAX1485Half/Full250No-µMAX/10
MAX1486Half/Full12000No-µMAX/10
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1485CUB停止供货MAX1485CUB+µMAX,;10引脚;15.4mm²0°C至+70°CRoHS/无铅:否
MAX1485CUB+生产中µMAX,;10引脚;15.4mm²0°C至+70°CRoHS/无铅:无铅
MAX1485CUB+T生产中µMAX,;10引脚;15.4mm²0°C至+70°CRoHS/无铅:无铅
MAX1485CUB-T停止供货MAX1485CUB+TµMAX,;10引脚;15.4mm²0°C至+70°CRoHS/无铅:否
MAX1485EUB停止供货MAX1485EUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1485EUB+生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1485EUB+T生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1485EUB-T停止供货MAX1485EUB+TµMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1485EUB/GG8生产中MAX1452AAE+UMAX;-40°C至+85°C参考数据资料
MAX1481-MAX1486.pdf MAX1486
Explanation of Maxim RS-485 Features MAX489
MAX1485.pdf MAX1485
MAX1481-MAX1486.pdf MAX1486