Analog Devices ADM3491EARZ, RS-422/RS-485 transceiver, full duplex, 1/1 driver/receiver, 10 Mbps data rate, 3V–3.6V supply, 50 mV receiver hysteresis, -40°C to +85°C, 14-SOIC package, tube.
| Parameter / Attribute | Specification / Value |
|---|---|
| Type | Transceiver |
| Mounting | Surface Mount |
| Supply voltage | 3V ~ 3.6V |
| Protocol | RS422, RS485 |
| Operating temperature | -40°C ~ 85°C |
| Duplex | Full |
| Package | Tube |
| Data rate | 10Mbps |
| Case | 14-SOIC (0.154\", 3.90mm Width) |
| Receiver hysteresis | 50 mV |
| Number of drivers (Receivers) | 1/1 |
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This is a 3.3 V full-duplex transceiver supporting both RS-422 and RS-485 protocols at 10 Mbps. The single driver and single receiver pair (1/1) suit point-to-point or multi-drop topologies where the bus turnaround is not needed. At 10 Mbps the output transition time is short enough to require controlled-impedance traces on the PCB – treat the differential pair as a 120 Ω transmission line.
Yes, it is a full-duplex transceiver, meaning it can transmit and receive simultaneously on separate wire pairs – ideal for RS-422 point-to-point links or RS-485 multi-drop where the bus does not need to be turned around.
The ADM3490ARZ is a functional peer: same full-duplex RS-485/RS-422 protocol, same 10 Mbps data rate, same 3.0 V supply, same 50 mV hysteresis, and same -40°C to +85°C range. The ADM3490ARZ differs only in the order-code suffix – verify the exact BOM position requirements before substituting.