ST485EXDR

Product Overview

The ST485EXDR from STMicroelectronics is a half-duplex transceiver intended for RS422 and RS485 differential serial interfaces. The device provides one driver and one receiver in a surface-mount 8-SOIC package and operates from a 4.75 V to 5.25 V supply. It is specified for a 5 Mbps data rate and includes 70 mV receiver hysteresis. The stated operating temperature range is -55°C to 125°C, for board-level interface designs that require an SOIC footprint and operation across the specified temperature range.

Key Features

• Half-duplex transceiver with one driver and one receiver
• RS422 and RS485 protocol support
• 5 Mbps data rate
• 70 mV receiver hysteresis
• 4.75 V to 5.25 V supply voltage range
• Specified operating temperature range of -55°C to 125°C
• Surface-mount 8-SOIC package

Applications

• Differential serial communication links using RS422 or RS485 signaling
• Half-duplex data nodes that exchange information through a single driver and receiver pair
• Board-level interface sections in surface-mount assemblies using a 4.75 V to 5.25 V supply

Design & Procurement Notes

When selecting this transceiver, confirm that the design uses RS422 or RS485 differential signaling and that the available supply remains within 4.75 V to 5.25 V. Because the device is a half-duplex 1/1 transceiver, the system should account for transmit and receive timing when alternating operations. The 70 mV receiver hysteresis and 5 Mbps data rate should be reviewed against signal quality and communication speed requirements. The surface-mount 8-SOIC package and -55°C to 125°C operating range should also be checked against PCB layout, thermal conditions, and assembly constraints.