ISO3080DWR: Isolated RS-485 Transceiver, andplusmn;15kV ESD Protection, 3-5.5V Wide Supply, 20Mbps High-Speed, Half-Duplex, Industrial Temp Range, Integrated Fault Protection, 50ns Propagation Delay

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Features

andbull; Meets or exceeds TIA/EIA RS-485 requirements

andbull; Signaling rates up to 20 Mbps

andbull; 1/8 unit load andndash; up to 256 nodes on a bus

andbull; Thermal shutdown protection

andbull; Low bus capacitance andndash; 16 pF (typical)

andbull; 50 kV/andmu;s typical transient immunity

andbull; Fail-safe receiver for bus open, short, idle

andbull; 3.3-V inputs are 5-V tolerant

andbull; Bus-pin ESD protection

andnbsp; andndash; 12-kV HBM between bus pins and GND2

andnbsp; andndash; 6-kV HBM between bus pins and GND1

andbull; Safety-related certifications:

andnbsp; andndash; 4000-VPK basic insulation, 560 VPK VIORM per DIN EN IEC 60747-17 (VDE 0884-17)

andnbsp; andndash; 2500 VRMS isolation per UL 1577

andnbsp; andndash; 4000 VPK isolation per CSA 62368-1

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Applications

andbull; Security systems

andbull; Chemical production

andbull; Factory automation

andbull; Motor and motion control

andbull; HVAC and building automation networks

andbull; Networked security stations

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Description

The ISO3080 and ISO3086 devices are isolated full duplex differential line drivers and receivers while the ISO3082 and ISO3088 devices are isolated half-duplex differential line transceivers for TIA/EIA 485/422 applications.

These devices are ideal for long transmission lines because the ground loop is broken to allow for a much larger common-mode voltage range. The symmetrical isolation barrier of the device is tested to provide 2500 VRMS of isolation for 60 s per UL 1577 between the bus-line transceiver and the logic-level interface.

Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver or nearby sensitive circuitry if they are of sufficient magnitude and duration. These isolated devices can significantly increase protection and reduce the risk of damage to expensive control circuits.

The ISO3080, ISO3082, ISO3086, and ISO3088 device are qualified for use from andndash;40anddeg;C to +85anddeg;C.

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INFORMATION

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Drawing

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