Texas Instruments

DS8921MX

DS8921MX Description

The DS8921MX is a full-duplex transceiver designed by Texas Instruments, featuring one driver and one receiver. This interface IC chip is engineered for robust performance in a variety of industrial and commercial applications. The DS8921MX operates within a temperature range of 0°C to 70°C, ensuring reliability in moderate to high-temperature environments. It is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) format, making it suitable for surface-mount applications. The device is powered by a supply voltage ranging from 4.5V to 5.5V, providing flexibility in power supply options.

The DS8921MX supports both RS422 and RS485 protocols, making it versatile for different communication standards. It includes a receiver hysteresis of 70 mV, which enhances signal integrity and reduces noise sensitivity. The transceiver is available in a tape and reel (TR) package, facilitating automated assembly processes. Despite its obsolescence status, the DS8921MX remains a reliable choice for existing systems and legacy applications.

DS8921MX Features

• Full-Duplex Communication: The DS8921MX supports full-duplex communication, allowing simultaneous data transmission and reception, which is crucial for applications requiring high data throughput and real-time communication.
• Receiver Hysteresis: With a receiver hysteresis of 70 mV, the DS8921MX ensures stable signal reception by minimizing the impact of noise and interference, thereby improving overall system reliability.
• Wide Operating Temperature Range: The operating temperature range of 0°C to 70°C makes the DS8921MX suitable for use in a variety of environments, from standard office settings to industrial applications with higher ambient temperatures.
• Flexible Power Supply: The DS8921MX operates within a supply voltage range of 4.5V to 5.5V, providing flexibility in power supply options and compatibility with a wide range of power sources.
• Surface-Mount Packaging: The 8-lead SOIC package is designed for surface-mount technology (SMT), enabling efficient and automated assembly processes, which are essential for high-volume production.
• Support for RS422 and RS485 Protocols: The DS8921MX supports both RS422 and RS485 protocols, making it versatile for different communication standards and ensuring compatibility with a wide range of systems.
• Moisture Sensitivity Level (MSL) 1: The DS8921MX has an MSL rating of 1, indicating unlimited exposure to moisture, which enhances its reliability and longevity in various environmental conditions.

DS8921MX Applications

The DS8921MX is ideal for applications requiring reliable and efficient data communication. Its support for RS422 and RS485 protocols makes it suitable for industrial automation, where robust and long-distance communication is essential. The full-duplex capability ensures real-time data exchange, which is critical for applications such as:

• Industrial Automation: The DS8921MX can be used in PLCs (Programmable Logic Controllers) and SCADA (Supervisory Control and Data Acquisition) systems, where precise control and monitoring are required.
• Data Communication Networks: It is suitable for building reliable data communication networks, including those in harsh industrial environments.
• Instrumentation and Control Systems: The DS8921MX can be integrated into various instrumentation and control systems, providing stable and efficient communication between devices.
• Telecommunications: The device can be used in telecommunication systems where full-duplex communication is necessary for high-speed data transmission.

Conclusion of DS8921MX

The DS8921MX is a versatile and reliable transceiver designed for a wide range of applications. Its full-duplex communication capability, combined with a receiver hysteresis of 70 mV, ensures robust and stable data transmission. The wide operating temperature range and flexible power supply options make it suitable for various environments. Despite its obsolescence status, the DS8921MX remains a reliable choice for existing systems and legacy applications, providing a proven solution for reliable data communication.