ST485EBN

Drivers, Receivers, Transceivers Overview

The ST485EBN is a low-power RS-485 and RS-422 transceiver manufactured by STMicroelectronics. It integrates one driver and one receiver in a half-duplex configuration, operating from a single 5V supply with a typical quiescent current of 300µA. The device features ±15kV HBM ESD protection without latch-up and supports up to 256 units on the bus. Key electrical parameters include a propagation delay of 30ns, a common mode input voltage range of -7V to 12V, and an input hysteresis of 70mV. It offers short-circuit current limiting and thermal shutdown for overload protection. The component is housed in an 8-pin DIP package and operates within a temperature range of -40°C to 85°C.

Drivers, Receivers, Transceivers Feature Summary

• Provides robust ±15kV electrostatic discharge protection on driver outputs and receiver inputs.
• Features fail-safe design with high impedance state during power-off or three-state conditions.
• Includes thermal shutdown and current limiting mechanisms to protect against driver overload.

Drivers, Receivers, Transceivers Applications

• Industrial automation systems requiring reliable multipoint communication
• Smart metering infrastructure utilizing RS-485 interfaces
• Building automation networks with bi-directional data transmission needs

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'N' indicates the through-hole DIP package variant distinct from surface-mount options. Confirm the industrial temperature grade (-40°C to 85°C) matches system requirements. Ensure compatibility with standard 5V logic levels before integration into existing circuit designs.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a through-hole DIP package is required for prototyping or specific board layouts. It serves as the industrial-grade version of the ST485 family, offering enhanced ESD protection compared to standard variants. Consider the 30ns propagation delay for timing-sensitive applications on the bus network.

Drivers, Receivers, Transceivers Part Context

This part belongs to the ST485E series, which distinguishes itself from the base ST485B model through integrated ±15kV ESD protection capabilities. While the ST485EBDR provides the same functionality in a surface-mount SOIC package, the ST485EBN utilizes a dual-in-line package suitable for breadboard development or legacy socket-based designs.

Drivers, Receivers, Transceivers Replacement Considerations

ST485EBDR (Surface Mount Equivalent)

Drivers, Receivers, Transceivers FAQ

What is the maximum number of transceivers supported on the bus?

The ST485EBN supports up to 256 transceivers on the bus due to its high input impedance characteristics.

How does the device handle driver overload conditions?

It incorporates short-circuit current limiting and thermal shutdown circuitry that places the driver outputs into a high-impedance state to prevent damage.