ST3485EIYDT

Product Overview

The ST3485EIYDT from STMicroelectronics is a surface-mount integrated transceiver in an 8-SOIC package. It supports RS422 and RS485 differential serial communication in a half-duplex configuration, with one driver and one receiver. The device operates from a 3V to 3.6V supply, provides a 15Mbps data rate, and is specified for an operating temperature range of -40°C to 125°C. It also includes a 70 mV receiver hysteresis and is specified with an automotive grade and AEC-Q100 qualification.

Key Features

• RS422 and RS485 protocol support in a half-duplex configuration
• One driver and one receiver integrated in an 8-SOIC surface-mount package
• Data rate specified at 15Mbps
• Supply voltage range of 3V to 3.6V
• Receiver hysteresis of 70 mV
• Operating temperature range of -40°C to 125°C
• AEC-Q100 qualification and automotive grade
• 8-SOIC package width of 0.154 in, 3.90 mm

Applications

• Automotive electronic modules using RS422 or RS485 differential serial links
• Equipment control buses connecting a host controller to serial peripherals
• Instrumentation and monitoring systems that require half-duplex serial data exchange

Design & Procurement Notes

Design notes should account for the 3V to 3.6V supply range, the 8-SOIC surface-mount footprint, and the -40°C to 125°C operating range. Because the device is a 1/1 half-duplex RS422/RS485 transceiver, system-level control of transmit and receive direction must be considered. The 15Mbps data rate and 70 mV receiver hysteresis can guide bus speed and noise-margin planning. The 0.154 in, 3.90 mm package width should be checked against the board layout, and the AEC-Q100 qualification and automotive grade are relevant for automotive designs.