The ST485E is a low power RS-485/RS-422 transceiver from ST. It features low power consumption, a wide common mode input voltage range, high input hysteresis, low propagation delay, single supply operation, ESD protection and overload protection.
The ST485E transceiver from STMicroelectronics provides robust RS‑485 and RS‑422 communication with high ESD protection and low power consumption. It operates from a single 5 V supply, supports up to 64 transceivers on a bus, and offers a wide common‑mode input range of –7 V to +12 V.
Key features include a low quiescent current of 300 µA, short‑circuit current limiting, thermal shutdown, and typical propagation delays of 25 ns. The device is offered in DIP‑8 and SO‑8 packages, with both tape‑and‑reel and tube packaging options.
| Supply Voltage (Voc) | 7 V |
|---|---|
| Low Quiescent Current | 300 µA |
| ESD Protection (Human Body Model) | +15 kV |
| ESD Protection (IEC‑1000‑4‑2) | +8 kV |
| Maximum Data Rate | 5 Mbps |
| Number of Transceivers on Bus | Up to 64 |
The device is rated for a supply voltage (Voc) of 7 V.
The ST485E allows up to 64 transceivers on the bus.
The typical low‑quiescent current is 300 µA.
It provides +15 kV protection under the Human Body Model and +8 kV under IEC‑1000‑4‑2.