ST485EX - STMicroelectronics

ST485EX RS-485/RS-422 transceiver

SO-8 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). The ST485E is a low power transceiver for RS.

Features

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