This document is the datasheet of ADM3491. ADM3491 is a low power differential line transceiver designed to operate using a single +3.3 V power supply. Low power consumption coupled with a shutdown mode make it ideal for portable devices.
The ADM3491 is a low‑power differential line transceiver that operates from a single +3.3 V supply and complies with EIA RS‑422 and RS‑485 standards. It features 19 kΩ input impedance, short‑circuit protection, thermal shutdown, and can support up to 50 transceivers on a single bus.
The document provides detailed electrical specifications, timing diagrams, pin‑out tables, package options (DIP, SOIC, TSSOP), and application guidance for telecommunications, industrial controls, and data‑concentration networks.
| Supply Voltage | +3.3 V |
|---|---|
| Input Impedance | 19 kΩ |
| Data Rate | 20 Mbps |
| Shutdown Current | 2 nA |
| Maximum Transceivers on Bus | 50 |
| Package Options | DIP (N‑14), SOIC (R‑14), TSSOP (RU‑16) |
The device operates with a +3.3 V supply.
Up to 50 transceivers can be connected on the bus.
The shutdown current is 2 nA.
It is offered in DIP (N‑14), SOIC (R‑14), and TSSOP (RU‑16) packages.