The ST490ACD is a high-performance transceiver from STMicroelectronics designed for RS-485 and RS-422 communication networks. This device is engineered to operate in challenging environments and is particularly suitable for industrial applications that require robust data communication with minimal power consumption.

Key Features

• Low Quiescent Current: The ST490ACD boasts a low-power consumption profile, making it ideal for energy-sensitive applications.
• Wide Common-Mode Range: It can handle common-mode voltages from -7V to +12V, providing reliable data transmission over a broad range of operating conditions.
• High Data Rate: Capable of supporting data rates up to 10 Mbps, the device can handle high-speed data transmission with ease.
• Thermal Shutdown Protection: The built-in thermal shutdown feature ensures that the device is protected from overheating, enhancing its reliability and longevity.
• Fail-safe Receiver: Even when the inputs are left open, shorted, or idle, the fail-safe receiver guarantees a known output state, reducing the risk of data errors.
• Half-Duplex Operation: The transceiver supports half-duplex communication, allowing for bidirectional communication over a single pair of wires.

Applications

The ST490ACD is versatile and can be used in a variety of applications, including:

• Industrial Control Systems
• Building Automation
• Networked Security Cameras
• Remote Data Acquisition
• Point of Sale (POS) Systems

Technical Specifications

The device is housed in an 8-pin package and operates over a temperature range of -40°C to +85°C. It requires a single 5V power supply and is designed to be compliant with the EIA/TIA-485 standard for differential data transmission.

Conclusion

With its robust feature set and reliable performance, the ST490ACD from STMicroelectronics is an excellent choice for designers looking to implement RS-485 or RS-422 communication in their industrial or commercial products. Its low power consumption, high data rates, and protective features make it a durable and efficient solution for data transmission requirements.