ST3241EC

The ST3241EC is a high-performance RS-485/RS-422 transceiver manufactured by STMicroelectronics, designed for robust data communication in industrial and automotive environments. It operates with a wide supply voltage range of 3.0 V to 5.5 V, enabling compatibility with various power systems while maintaining low quiescent current consumption—typically 1.5 mA in active mode and less than 1 µA in shutdown mode. This efficiency makes it ideal for battery-powered or energy-sensitive applications. The device supports data rates up to 10 Mbps, ensuring fast and reliable transmission over long cable runs, with a differential receiver threshold of ±200 mV for improved noise immunity. Its integrated protection features include ±15 kV ESD protection on all pins, making it resilient to electrostatic discharge events common in harsh environments. Additionally, the ST3241EC includes short-circuit protection and thermal shutdown functionality to prevent damage from overcurrent or overheating conditions. It offers a half-duplex interface, allowing bidirectional communication over a single pair of wires, which simplifies wiring in multi-node networks such as those found in building automation, factory floor control systems, and process instrumentation. The transceiver’s logic inputs are compatible with both 3.3 V and 5 V CMOS levels, enhancing flexibility in system integration. Its compact SO8 package ensures minimal PCB footprint, suitable for space-constrained designs. Key operational features include a driver enable (DE) and receiver output enable (RE) pin for precise control over transmission and reception states, along with a fail-safe input mechanism that ensures a defined logic level when the input is open. These characteristics enhance system reliability in noisy or uncertain signal conditions. The ST3241EC also complies with the TIA/EIA-485-A standard, ensuring interoperability across a broad range of industrial communication protocols. Its robust design and advanced protection make it particularly well-suited for use in industrial automation, medical equipment, HVAC systems, and smart metering applications where stable, long-distance serial communication is critical. By combining performance, durability, and ease of integration, the ST3241EC delivers a reliable solution for modern embedded communication needs.