The ST485 is a low power transceiver for RS-485 and RS-422 communication, featuring a slew-rate limited driver that minimizes electromagnetic interference (EMI) and reduces reflections caused by improperly terminated cables, thus ensuring data integrity over long distances. This transceiver is designed by STMicroelectronics, a leader in semiconductor solutions, to provide a robust interface for multi-point data transmission standard in both industrial and commercial applications.

Key Features

• Low Quiescent Current: The ST485 is designed to operate with a very low supply current, making it ideal for power-sensitive applications.
• Wide Supply Voltage Range: It operates from a 5V supply voltage, accommodating a variety of system requirements.
• Driver and Receiver Enable Functions: Separate enable functions for the driver and receiver allow the transceiver to be put in a low-power shutdown mode when not in use.
• Thermal Shutdown Protection: The device includes a thermal shutdown feature that protects it from damage due to excessive power dissipation.
• High Data Rate: Supports data rates up to 2.5 Mbps, suitable for high-speed communication requirements.
• Fail-safe Receiver: The receiver ensures a logic high output if the input is open circuit, shorted, or connected to a terminated transmission line with all drivers disabled.

Applications

The ST485 transceiver can be used in a variety of applications that require low power consumption and high data integrity. These include:

• Industrial control systems
• Factory automation
• Building automation
• Networked security systems
• Remote data acquisition

Package and Quality

STMicroelectronics offers the ST485 in several package options, including SO-8 and DIP-8, providing flexibility for different PCB layouts and space constraints. The device is built to meet high-quality standards, ensuring reliability and performance in demanding environments.

For detailed specifications, application notes, and additional resources, please refer to the official ST485 datasheet provided by STMicroelectronics.