STMicroelectronics' portfolio of interfaces includes standard interfaces (such as RS-232, RS422, RS-423, RS-485, LVDS, and USB), I/O expanders, level translators, and application-specific interfaces for smart cards and Ethernet.

The RS-232 family includes transceivers with auto-power-down and standby functions, multi-channel interfaces, and driver/receiver circuits. These devices have a 5 V supply and are ESD protected, enabling true RS-232 performance.

The low-power, high-speed transceivers of this family are designed for RS-485, RS-422, and RS-423 communications applications. They usually contain one driver and one receiver in a half-duplex configuration. Each driver output and receiver input is protected against electrostatic discharge up to ±15 Kv and has no latch-up. These transceivers operate with a 5 V supply and draw a very-low supply current when unloaded or fully loaded but with disabled drivers.

A SERCOS interface controller for industrial control systems enables real-time communication via optical fiber rings, RS-485 rings, and RS-485 buses.

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