Texas Instruments

DS8921N

DS8921N Description

The DS8921N is a full-duplex transceiver designed for reliable data transmission over balanced lines. Manufactured by Texas Instruments, this device is part of the Drivers, Receivers, Transceivers category and is housed in an 8-pin DIP package. The DS8921N features one driver and one receiver, making it suitable for applications requiring bidirectional communication. It operates within a supply voltage range of 4.5V to 5.5V and can function in an ambient temperature range of 0°C to 70°C. The receiver includes a hysteresis of 70 mV, enhancing noise immunity and ensuring robust performance. The DS8921N supports both RS422 and RS485 protocols, making it versatile for various industrial and communication applications.

DS8921N Features

• Full-Duplex Communication: The DS8921N supports full-duplex communication, allowing simultaneous data transmission and reception, which is crucial for applications requiring real-time data exchange.
• Receiver Hysteresis: With a receiver hysteresis of 70 mV, the DS8921N offers improved noise immunity, reducing the likelihood of data errors in noisy environments.
• Wide Operating Voltage Range: The device operates within a supply voltage range of 4.5V to 5.5V, providing flexibility and compatibility with various power supply configurations.
• Balanced Line Support: The DS8921N is designed for balanced line communication, which helps in minimizing electromagnetic interference and ensuring reliable data transmission over long distances.
• Through-Hole Mounting: The through-hole mounting type ensures secure and reliable physical integration into printed circuit boards, making it suitable for applications requiring robust mechanical stability.
• Obsolete Status: While the DS8921N is marked as obsolete, it remains a reliable choice for legacy systems and applications where its specific features are still required.

DS8921N Applications

The DS8921N is ideal for a variety of industrial and communication applications, including:

• Industrial Automation: In industrial settings, the DS8921N can be used for communication between programmable logic controllers (PLCs), sensors, and actuators, facilitating efficient control and monitoring.
• Data Acquisition Systems: For data acquisition systems, the DS8921N ensures reliable data transmission from remote sensors to central processing units, maintaining data integrity and accuracy.
• Telecommunications: The DS8921N can be employed in telecommunication infrastructure for data transmission over long distances, supporting RS422 and RS485 protocols.
• Transportation Systems: In transportation, the DS8921N can be used for communication between different components of a vehicle or train, such as between the control unit and various sensors or actuators.

Conclusion of DS8921N

The DS8921N from Texas Instruments is a robust full-duplex transceiver that offers reliable data transmission with enhanced noise immunity due to its 70 mV receiver hysteresis. Its wide operating voltage range and support for balanced line communication make it suitable for a variety of industrial and communication applications. Despite its obsolete status, the DS8921N remains a valuable component for legacy systems and applications where its specific features are still required. Its through-hole mounting type ensures secure integration into printed circuit boards, making it a reliable choice for applications needing robust mechanical stability.