ST490ABDR

Product Overview

The ST490ABDR from STMicroelectronics is a surface-mount RS422/RS485 transceiver in an 8-SOIC package. It provides one driver and one receiver in a full-duplex arrangement and operates from a 4.5 V to 5.5 V supply. The specified data rate is 25 Mbps, and the receiver hysteresis is 70 mV. The operating temperature range is -40°C to 85°C. The device can be used in interface designs where these supply, package, duplex, data-rate, hysteresis, and temperature parameters match the system requirements.

Key Features

• RS422 and RS485 protocol support
• One driver and one receiver with full-duplex operation
• 25 Mbps data rate
• 4.5 V to 5.5 V supply voltage range
• 70 mV receiver hysteresis
• 8-SOIC surface-mount package with 3.90 mm width
• -40°C to 85°C operating temperature range

Applications

• Serial data links using RS422 or RS485 signaling
• Controller-to-peripheral communication paths requiring separate transmit and receive signal directions
• Control, instrumentation, or data-acquisition boards that require a single RS422/RS485 transceiver channel

Design & Procurement Notes

When selecting the ST490ABDR, confirm that the system uses a 4.5 V to 5.5 V supply, because the device is specified for that voltage range. Verify that the PCB layout supports an 8-SOIC surface-mount package and that the required communication is full-duplex with one driver and one receiver. The 25 Mbps data rate and 70 mV receiver hysteresis should be checked against the intended bus length, cabling, noise environment, and protocol timing. The -40°C to 85°C operating temperature range should be matched to the enclosure or board thermal conditions. The supplied lifecycle status is Active, which can be considered when planning board production.