ST3485ECDR

Drivers, Receivers, Transceivers Overview

The ST3485ECDR is a half-duplex RS-422 and RS-485 transceiver manufactured by STMicroelectronics. It integrates one driver and one receiver in an 8-pin SOIC package. The device operates from a single 3V to 3.6V supply, eliminating the need for charge pumps. It supports data rates up to 15Mbps with a typical operating supply current of 2.2mA. The component functions within a commercial temperature range of 0°C to 70°C and meets AEC-Q100 automotive qualification standards.

Drivers, Receivers, Transceivers Feature Summary

• Provides ±15 kV IEC 61000-4-2 air discharge ESD protection on all transmitter outputs and receiver inputs.
• Features thermal shutdown circuitry that places driver outputs into a high impedance state during excessive power dissipation.
• Ensures a guaranteed high receiver output state when inputs are floating with no signal present.
• Supports interoperability with 5V logic systems while operating from a single 3.3V supply.

Drivers, Receivers, Transceivers Applications

• RS-485 communication bus networks
• RS-422 point-to-point or multi-point links
• Industrial automation control systems
• Building automation and security interfaces

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'CDR' indicates the commercial temperature grade (0°C to 70°C) and tape-and-reel packaging format. Confirm the AEC-Q100 qualification status aligns with target application requirements. Ensure the 8-SOIC footprint matches the printed circuit board layout constraints before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this model for applications requiring low power consumption and robust ESD protection without external components. Compare against industrial grade variants if extended temperature ranges beyond 70°C are necessary. Verify compatibility with existing system voltage levels, as the device requires a 3V to 3.6V supply rail for proper operation.

Drivers, Receivers, Transceivers Part Context

This component belongs to the ST3485E series of low-power transceivers designed for RS-485 and RS-422 communications. The series includes various temperature grades and package options, such as the EB and EIY variants. The ST3485ECDR specifically targets cost-sensitive commercial applications requiring reliable differential signaling capabilities.

Drivers, Receivers, Transceivers Replacement Considerations

ISL43485IBZ

Drivers, Receivers, Transceivers FAQ

What is the maximum data rate supported by the ST3485ECDR?

The device guarantees a data rate of at least 12 Mbps, with specifications indicating support up to 15 Mbps.

Does the ST3485ECDR require a charge pump for operation?

No, the device operates from a single 3V to 3.6V supply and does not require a charge pump.

How is the receiver output configured when there is no input signal?

The device guarantees a high receiver output state when the inputs are floating and no signal is present.