The MAX1482 and MAX1483 are low-power transceivers for RS-485 and RS-422 communication. Both feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables. Data rates are guaranteed up to 250kbps.
The MAX1482/MAX1483 draw only 20μA of supply current. Additionally, they have a low-current shutdown mode that consumes only 0.1μA. Both 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 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.
The MAX1482 is full duplex and the MAX1483 is half duplex. Both parts have a 1/8-unit-load input impedance that guarantees up to 256 transceivers on the bus.
關鍵特性
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Low 20μA Operating Current
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Slew-Rate Limited for Reduced EMI and Reduced Reflections
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0.1μA Low-Current Shutdown Mode
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Designed for RS-485 and RS-422 Applications
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Operate from a Single +5V Supply
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-7V to +12V Common-Mode Input Voltage Range
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Allows up to 256 Transceivers on the Bus—Guaranteed (1/8-unit load)
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Current Limiting and Thermal Shutdown for Driver Overload Protection
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應用/使用
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工業控制局域網
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大規模256節點LAN
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低功耗RS-485/RS-422網絡
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用于EMI敏感應用的收發器
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