ADM3485EAR

ESD保护，符合EMC ， 3.3 V ， 20 Mbps的EIA RS- 485收发器 ESD Protected, EMC Compliant, 3.3 V, 20 Mbps, EIA RS-485 Transceiver

Product Details

The ADM3485E is a 3.3 V, low power data transceiver with ±15 kV ESD protection, suitable for half-duplex communication on multipoint bus transmission lines. The ADM3485E is designed for balanced data transmission and complies with TIA/EIA standards RS485 and RS-422. The ADM3485E is a half-duplex transceiver that shares differential lines and has separate enable inputs for the driver and the receiver.

The devices have a 12 kΩ receiver input impedance, which allows up to 32 transceivers on a bus. Because only one driver should be enabled at any time, the output of a disabled or powered-down driver is tristated to avoid overloading the bus.

The receiver has a fail-safe feature that ensures a logic high output when the inputs are floating. Excessive power dissipation caused by bus contention or by output shorting is prevented with a thermal shutdown circuit.

The part is fully specified over the industrial temperature range and is available in an 8-lead narrow SOIC package.

**APPLICATIONS**

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Power/energy metering

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Telecommunications

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EMI-sensitive systems Industrial control

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Local area networks

### Features and Benefits

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TIA/EIA RS-485/RS-422 compliant

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±15 kV ESD protection on RS-485 input/output pins

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12 Mbps data rate

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Half-duplex transceiver

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Up to 32 nodes on the bus

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Receiver open-circuit, fail-safe design

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Low power shutdown current

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Outputs high-Z when disabled or powered off

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Common-mode input range: −7 V to +12 V

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Thermal shutdown and short-circuit protection

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Industry-standard 75176 pinout

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8-lead narrow SOIC package