The half-duplex RS-485/RS-422 transceiver operates from a 3.0 V to 3.6 V supply and supports 12 Mbps data transmission. It provides ±15 kV human-body-model ESD protection on the A and B bus pins and supports up to 32 nodes on a multipoint bus. The receiver includes open-circuit fail-safe behavior and a 12 kΩ input impedance. The device is specified for the industrial −40 °C to +85 °C temperature range and is offered in an 8-lead narrow SOIC package.
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| Interface standard | TIA/EIA RS-485/RS-422 |
| Duplex | Half duplex |
| Supply voltage range | 3.0 to 3.6V |
| Maximum data rate | 12Mbps |
| Bus ESD protection | ±15, human body modelkV |
| All other pins ESD protection | ±4, human body modelkV |
| Receiver input impedance | 12kΩ |
| Bus nodes supported | Up to 32 |
| Common-mode input range | -7 to +12V |
| Differential output voltage, RS-422 load | 2.0 min at 100 ΩV |
| Differential output voltage, RS-485 load | 1.5 min at 54 ΩV |
| Differential input threshold voltage | -0.2 to +0.2V |
| Input voltage hysteresis | 50 typmV |
| Supply current | 1.1 typ, 2.2 maxmA |
| Shutdown current | 0.002 typ, 1 maxµA |
| Operating temperature range | -40 to +85°C |
| Package thermal resistance θJA | 158°C/W |
| Package | 8-lead SOIC_N |
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These are design resources that include the Analog Devices ADM3485E
EMC compliant RS-485 protection circuits using the ADM3485E with Bourns components to meet IEC 61000-4-2, 61000-4-4, and 61000-4-5 standards up to 6 kV surge levels.
