The ST485ERB is a low power RS-485/RS-422 transceiver from ST company. Its features are low quiescent current (300μA), support -7V to 12V input voltage range, can keep the driver in high impedance through 3-state or power off, has 70mV typical input hysteresis, 30ns propagation delay and 5ns skew, single 5V power supply, overload protection, ESD protection and other functions.
The ST485ERB is a low-power transceiver designed for bi-directional data communications on multipoint bus transmission lines, supporting both RS-485 and RS-422 standards. It features +15 kV ESD protection (HBM) and +8 kV (IEC-1000-4-2) contact discharge protection without latch-up. The device operates from a single 5 V supply and draws a typical quiescent current of 300 µA.
| ESD protection voltage (HBM) | +15 kV |
|---|---|
| ESD protection voltage (IEC) | +8 kV |
| Supply voltage | 5 V |
| Quiescent current (typical) | 300 µA |
| Maximum data rate | 2.5 Mbps |
The typical quiescent current is 300 µA when unloaded or fully loaded with disabled drivers.
It operates from a single 5 V supply.
Up to 256 transceivers can be connected to the bus.