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MAX1481 - 软件可选的、半/全双工、限摆率、12Mbps、RS-485/RS-422收发器,µMAX封装


MAX1481 - 软件可选的、半/全双工、限摆率、12Mbps、RS-485/RS-422收发器,µMAX封装 - 传感器与传感器接口 - Maxim美信半导体高性能芯片品质 - 美信半导体


The MAX1481/MAX1484/MAX1485/MAX1486 providesoftware-selectable, half-/full-duplex, low-power, slew-rate-limited, and high-speed (12Mbps) RS-485/RS-422operation in a 10-pin µMAX® package—the smallest10-pin package available.

The software-selectable, half-/full-duplex MAX1485/MAX1486 make obsolete the normally larger and moreexpensive solutions required for selectable half-/full-duplexRS-485/RS-422 operation: 1) a 14-pin, full-duplextransceiver configured via jumpers betweenreceiver and transmitter lines, or 2) two 8-pin, half-duplextransceivers, which require an additional inverterlogic gate for software selectability.

The MAX1481/MAX1484 are functionally equivalent tothe industry-standard MAX491 and 75180, and aredesigned for space-constrained, full-duplex RS-422applications.

All parts contain one driver and one receiver and featurea 1/8-unit-load receiver input impedance, allowingup to 256 transceivers on the bus. The MAX1481/MAX1485 feature reduced-slew-rate drivers that minimizeEMI and reduce reflections caused by improperlyterminated cables, allowing error-free data transmissionup to 250kbps. The MAX1484/MAX1486 driver slewrates are not limited, allowing them to transmit up to12Mbps.

The MAX1481/MAX1484/MAX1485/MAX1486 draw only300µA of supply current. The MAX1481 has a low-powershutdown mode that reduces supply current to only0.1µA. All devices operate from a single 5V supply.

Drivers are output short-circuit current limited and areprotected against excessive power dissipation bythermal-shutdown circuitry that places the driver outputsinto a high-impedance state. The receiver input has a fail-safefeature that guarantees a logic-high output if theinput is open circuit.

  • 以下关键特性由Maxim美信半导体提供:
  • 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 DataTransmission (MAX1481/MAX1485)
  • 12Mbps High-Speed Operation(MAX1484/MAX1486)
  • Allow up to 256 Transceivers on the Bus
  • 热门应用
  • 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
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