MAX1484

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


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说明

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.
MAX1481、MAX1484:引脚配置 MAX1481、MAX1484:引脚配置 放大+

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

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

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)
Tx ENRx ENICC (Shutdn.)
(µA)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
(°C)
Package/PinsBudgetary
Price
(typ)(min)(typ)(See Notes)
MAX1481 1Tx + 1RxFull50.3250YesYes0.1256NoneNo-40 to +85
UMAX/10
$1.60 @1k
MAX1484 Full12000Yes-
UMAX/10
$1.60 @1k
MAX1485 Half/Full250No-
UMAX/10
$1.75 @1k
MAX1486 Half/Full12000No-
UMAX/10
$1.60 @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。
产品可靠性报告: MAX1484.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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