ST485EB：15 kV ESD protected, low power RS-485/RS-422 transceiver, [-40oC, 85oC] temperature range

The ST485E is a low power transceiver for RS-485 and RS-422 communication. Each driver output and receiver input is protected against ±15 kV electrostatic discharge (H.B.M.) (ESD) shocks, without latch-up. These parts contain one driver and one receiver in half duplex configuration.

This transceiver draws 300 µA (typ.) of supply current when unloaded or fully loaded with disabled drivers.

It operates from a single 5 V supply.

Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that place the driver outputs into a high-impedance state.

The ST485E is designed for bi-directional data communications on multipoint bus transmission lines (half-duplex applications).

Key Features

Allows up to 256 transceivers on the bus
ESD protection: ±15 kV (H.B.M.) ±8 kV (IEC-1000-4-2 contact discharge)
Operates from a single 5 V supply
30 ns propagation delay, 5 ns skew
Low quiescent current: 300 µA
-7 V to 12 V common mode input voltage range
Designed for RS-485 interface application
70 mV typical input hysteresis
Current limiting and thermal shutdown for driver overload protection
Driver maintains high impedance in 3-state or with the power OFF

Product Specifications

Description	Version	Size
DS2530: +/-15 kV ESD protected, low power RS-485/RS-422 transceiver	14.2	698 KB

Application Notes

Description	Version	Size
AN1690: Fail-safe biasing for ST485EB	2.3	269 KB
AN1348: ST485: an RS-485 based interface with lower data bit errors	3.2	112 KB
AN1702: ST485EB for e-meter applications	2.3	153 KB