STMicroelectronics

ST490ABN

ST490ABN Description

The ST490ABN is a full-duplex transceiver designed by STMicroelectronics, a leading manufacturer in the electronics industry. This interface IC chip is specifically engineered for RS422 and RS485 protocols, making it ideal for a wide range of industrial and commercial applications. The ST490ABN features a single driver and a single receiver, providing robust communication capabilities at a data rate of 50 Mbps. It operates within a supply voltage range of 4.5V to 5.5V, ensuring compatibility with various power supply configurations.

The ST490ABN is housed in a through-hole package, specifically an 8DIP tube, which facilitates easy integration into printed circuit boards. This packaging method also enhances the chip's durability and reliability in various environmental conditions. Despite being marked as obsolete, the ST490ABN remains a reliable choice for applications requiring stable and efficient data transmission.

ST490ABN Features

• Full-Duplex Communication: The ST490ABN supports full-duplex communication, allowing simultaneous data transmission and reception. This feature is crucial for applications requiring high-speed, bidirectional data exchange.
• Receiver Hysteresis: The receiver incorporates a hysteresis of 70 mV, which helps in reducing noise sensitivity and improving signal integrity. This ensures reliable data transmission even in noisy environments.
• Wide Operating Voltage Range: With a supply voltage range of 4.5V to 5.5V, the ST490ABN is versatile and can be integrated into various systems without requiring specialized power supplies.
• Compliance and Safety: The ST490ABN is REACH unaffected and RoHS3 compliant, ensuring it meets stringent environmental and safety standards. This compliance is essential for manufacturers aiming to adhere to global regulations.
• Moisture Sensitivity Level: The chip has an MSL rating of 1 (unlimited), indicating it can withstand high humidity levels without degradation, making it suitable for use in humid or moist environments.

ST490ABN Applications

The ST490ABN is well-suited for applications requiring reliable and efficient data communication over long distances. Its compatibility with RS422 and RS485 protocols makes it ideal for:

• Industrial Automation: In factories and manufacturing plants, the ST490ABN can facilitate communication between PLCs (Programmable Logic Controllers) and various sensors and actuators.
• Telecommunications: For data transmission in telecommunication systems, the ST490ABN ensures stable and error-free communication.
• Transportation Systems: In transportation, it can be used for communication between different components of a vehicle or in traffic control systems.
• Building Automation: For managing HVAC systems, lighting, and other building control systems, the ST490ABN provides a reliable communication link.

Conclusion of ST490ABN

The ST490ABN transceiver from STMicroelectronics is a robust and versatile solution for RS422 and RS485 communication needs. Its full-duplex capability, receiver hysteresis, and wide operating voltage range make it a reliable choice for various applications. Despite being marked as obsolete, the ST490ABN continues to offer significant advantages over similar models, particularly in terms of its compliance with environmental and safety standards. For industries requiring stable and efficient data transmission, the ST490ABN remains a viable and effective option.