RS485 network transceiver, have you heard of it?

Do you know about RS485 network transceiver? What does it do? December 6, 2018 – STMicroelectronics’ 3.3V RS485 [a (physical layer) communication standard widely used in industrial systems. ] The transceiver STR485LV provides an external pin to select 20Mbps or 250kbps communication rate and can be directly connected to low-voltage logic devices as low as 1.8V, thereby increasing design flexibility.

User-selectable data rate pins allow designers to use the same transceiver to connect high-speed/short-range or longest-range (4000 feet) RS485 networks, depending on the performance of the cable, simplifying inventory management of RS485 devices. The new products are suitable for a variety of application scenarios, including telecommunications infrastructure, high-speed data links or low-voltage microcontroller communications.

The new product provides designers with flexible connection options, using 1.65V-3.6V data and enable signal power supplies to directly connect 1.8V-3.3V low-voltage logic devices without external level conversion components.

The chip's internal driver output resistance remains above 96Ω, and the maximum operating temperature is increased to 105°C. According to the RS485 communication interface technical specifications, STR485 can connect up to 256 transceivers on the same bus.

The new products combine excellent electrical safety and robustness features, including thermal shutdown, which prevents excessive power consumption due to bus contention or faults, and receiver fault protection mode, which prevents inputs from being idle, shorted, or not connected. An error occurred. The bus pins can withstand more than ±8kV contact discharge and ±16kV air discharge without latch-up, which is higher than the IEC 61000-4-2 specification, and can withstand IEC61000-4-4 standard Class B fast transient pulses . The above is the analysis of RS485 network transceiver, I hope it can help you.