ST485ERBDR

The ST485ERB 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 (HBM) ±8 kV (IEC-1000-4-2 contact discharge) shocks, without latch-up. These parts contain one driver and one receiver. 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. The driver is a short-circuit current which is limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The ST485ERB is designed for bi-directional data communication on multipoint bus transmission lines (half-duplex applications).

Key features

• Low quiescent current: 300 μA
• Designed for RS-485 interface applications
• 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 64 transceivers on the bus