The ADM3491 is a low power differential line transceiver designed to operate using a single +3.3V power supply. Low power consumption and a shutdown mode make it ideal for battery powered or other applications with limited power supplies.
The ADM3491 is a low‑power differential line transceiver designed for operation from a single +3.3 V supply. It complies with EIA RS‑422 and RS‑485 standards, providing full‑duplex data transfer and a shutdown mode for power‑sensitive applications. The device includes a differential driver and receiver, 19 kΩ input impedance, and a fail‑safe receiver that outputs a logic high when inputs are floating.
Key specifications include a 20 Mbps data rate, 840 µA supply current, 2 nA shutdown current, and the ability to connect up to 50 transceivers on a single bus. The part is offered in DIP, SOIC, and TSSOP packages and operates over an industrial temperature range of –40 °C to +85 °C. Typical applications are telecommunications, industrial controls, and data networking.
| Supply Voltage | +3.3 V |
|---|---|
| Data Rate | 20 Mbps |
| Supply Current | 840 µA |
| Shutdown Current | 2 nA |
| Maximum Transceivers on Bus | 50 |
| Thermal Shutdown | Enabled |
| Package Options | DIP, SOIC, TSSOP |
The device operates from a single +3.3 V supply.
Up to 50 transceivers can be connected on the bus.
The shutdown current is 2 nA.
The part is offered in DIP, SOIC, and TSSOP packages.