DS485M

TEXAS INSTRUMENTS  DS485M  收发器, RS422 / RS485, 4.75V-5.25电源, SOIC-8

The is a low-power Multipoint Transceiver for RS-485 and RS-422 communication. The device contains one driver and one receiver. The driver slew rate allows for operation up to 2.5Mbps. The transceiver draws 200µA of supply current when unloaded or fully loaded with the driver disabled and operates from a single +5V supply. The driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into tri-state high impedance state under fault conditions. The driver ensures a minimum of 1.5V differential output voltage with maximum loading across the common mode range VOD3. The receiver has a failsafe feature that ensures a logic-high output if the input is open circuit.

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Tri-state outputs on driver and receiver

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Half-duplex flow-through pin-out

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Allows up to 32 transceivers on the bus

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Current-limiting and thermal shutdown for driver overload protection

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Industrial temperature range operation

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Pin and functional compatible with MAX485 and LTC485

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-7 to +12V Common-mode input voltage range

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25ns Typical driver transition time

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40ns Typical driver propagation delay

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1ns Typical driver skew

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200ns Typical receiver propagation delay

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20ns Typical receiver skew