ST3485ECDR

Product Overview

The STMicroelectronics ST3485ECDR is a half-duplex RS422 and RS485 transceiver that uses one driver and one receiver. It operates from a 3 V to 3.6 V supply and supports a 15 Mbps data rate. The device is housed in an 8-SOIC surface-mount package with a 0.154 inch, 3.90 mm body width, and provides 70 mV of receiver hysteresis. Its specified operating temperature range is 0°C to 70°C, and it carries AEC-Q100 qualification.

Key Features

• Half-duplex RS422 and RS485 transceiver with a 1/1 driver and receiver configuration
• 3 V to 3.6 V supply voltage range
• 15 Mbps data rate
• 70 mV receiver hysteresis
• 0°C to 70°C operating temperature range
• 8-SOIC surface-mount package
• AEC-Q100 qualification

Applications

• RS422 or RS485 serial data links in embedded systems
• Half-duplex communication between a controller and a bus node
• Differential serial communication in surface-mount boards operating from 3 V to 3.6 V

Design & Procurement Notes

Designers selecting the ST3485ECDR should match the 3 V to 3.6 V supply range and the 0°C to 70°C operating window to the target assembly. The 15 Mbps data rate and half-duplex 1/1 architecture define the data rate and direction control considerations for the interface. The 8-SOIC surface-mount package supports standard automated placement and reflow processes, while the 70 mV receiver hysteresis can be considered in differential line interface design. The AEC-Q100 qualification should be accounted for in designs that require components meeting that standard.