Texas Instruments

SN65HVD21ADR

SN65HVD21ADR Description

The SN65HVD21ADR is a half-duplex transceiver IC designed for robust and reliable data communication over long distances. Manufactured by Texas Instruments, this device is part of the Interface IC Chips category and is housed in an 8SOIC package. It features one driver and one receiver, making it suitable for applications requiring efficient data transmission in RS422 and RS485 protocols. The SN65HVD21ADR operates within a supply voltage range of 4.5V to 5.5V and supports a data rate of up to 5Mbps, ensuring high-speed communication. Despite being marked as obsolete, this transceiver remains a reliable choice for specific industrial and commercial applications due to its robust design and performance.

SN65HVD21ADR Features

• Half-Duplex Operation: The SN65HVD21ADR supports half-duplex communication, allowing it to transmit and receive data on the same line, which is ideal for applications where bidirectional communication is required without the need for separate transmit and receive lines.
• High Data Rate: With a maximum data rate of 5Mbps, the SN65HVD21ADR ensures fast and efficient data transmission, making it suitable for applications requiring high-speed communication.
• Receiver Hysteresis: The receiver incorporates a hysteresis of 130 mV, which enhances noise immunity and ensures reliable data reception even in noisy environments.
• Wide Supply Voltage Range: The device operates within a supply voltage range of 4.5V to 5.5V, providing flexibility in power supply options and ensuring compatibility with various power sources.
• Surface Mount Technology: The SN65HVD21ADR is designed for surface mount applications, allowing for compact and efficient PCB layouts, which is crucial for modern electronics where space is often a constraint.
• Compliance and Safety: The SN65HVD21ADR is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards, making it suitable for use in a wide range of applications without regulatory concerns.
• Moisture Sensitivity Level: With an MSL rating of 1 (unlimited), the device is highly resistant to moisture, making it suitable for use in humid or damp environments without the need for special handling or storage conditions.

SN65HVD21ADR Applications

The SN65HVD21ADR is ideal for a variety of applications where reliable and efficient data communication is required. Some specific use cases include:

• Industrial Automation: In industrial settings, the SN65HVD21ADR can be used for communication between PLCs (Programmable Logic Controllers), sensors, and actuators, ensuring robust and reliable data transmission over long distances.
• Building Automation Systems: For building automation, this transceiver can facilitate communication between various subsystems such as HVAC (Heating, Ventilation, and Air Conditioning), lighting control, and security systems.
• Telecommunications: In telecommunication applications, the SN65HVD21ADR can be used for data transmission between different nodes in a network, ensuring high-speed and reliable communication.
• Transportation Systems: For transportation systems, such as traffic control and railway signaling, the SN65HVD21ADR provides a reliable communication link between various components, ensuring smooth operation and safety.

Conclusion of SN65HVD21ADR

The SN65HVD21ADR, despite being marked as obsolete, remains a robust and reliable choice for applications requiring efficient half-duplex communication. Its high data rate, wide supply voltage range, and enhanced noise immunity make it suitable for a variety of industrial and commercial applications. The device's compliance with environmental and safety standards, along with its moisture resistance, ensures it can be used in diverse environments without concerns. While newer models may offer additional features, the SN65HVD21ADR continues to provide reliable performance and is an excellent choice for applications where its specific features are required.