Texas Instruments

SN74HCT257DT  

Encoders, Decoders, Multiplexers & Demultiplexers

SN74HCT257DT Description

The SN74HCT257DT is a 4 x 2:1 multiplexer integrated circuit (IC) designed for high-speed switching applications. Manufactured by Texas Instruments, this logic IC chip belongs to the 74HCT series and is housed in a 16-pin SOIC package. The device is designed for surface mount applications and operates on a single supply voltage ranging from 4.5V to 5.5V. It features a current output capability of 6mA for both high and low states, ensuring robust performance in various digital circuits.

The SN74HCT257DT is classified under ECCN EAR99 and is REACH unaffected, indicating compliance with international export regulations and environmental standards. It is also RoHS3 compliant, making it suitable for use in environmentally conscious designs. The device is packaged in tape and reel (TR) format, facilitating automated assembly processes and ensuring ease of handling in manufacturing environments.

SN74HCT257DT Features

• Multiplexing Capability: The SN74HCT257DT provides four independent 2:1 multiplexing circuits, allowing for efficient selection and routing of multiple input signals to a single output.
• Single Supply Operation: With a supply voltage range of 4.5V to 5.5V, the device offers flexibility in power supply options and ensures compatibility with standard digital systems.
• High Current Output: The IC supports a current output of 6mA for both high and low states, enabling it to drive a variety of digital loads without additional buffering.
• Surface Mount Compatibility: The 16SOIC package is ideal for surface mount technology (SMT), providing a compact and reliable solution for modern printed circuit board (PCB) designs.
• Compliance and Standards: The SN74HCT257DT is REACH unaffected and RoHS3 compliant, ensuring it meets stringent environmental and regulatory requirements.
• Moisture Sensitivity Level: With an MSL rating of 1 (Unlimited), the device is highly resistant to moisture, making it suitable for a wide range of operating environments.

SN74HCT257DT Applications

The SN74HCT257DT is well-suited for applications requiring efficient signal routing and selection. Its 4 x 2:1 multiplexing capability makes it ideal for:

• Data Acquisition Systems: Where multiple sensor inputs need to be selectively routed to a single processing unit.
• Digital Signal Processing: In systems where different input signals must be multiplexed for further processing or analysis.
• Communication Interfaces: For switching between multiple data channels in communication systems.
• Automotive Electronics: In applications where compact, reliable, and environmentally compliant components are required.
• Industrial Control Systems: For managing and routing control signals in various industrial automation processes.

Conclusion of SN74HCT257DT

The SN74HCT257DT is a versatile and reliable multiplexer IC that offers significant performance benefits in a compact surface mount package. Its ability to handle multiple input signals efficiently, combined with its high current output and compliance with environmental standards, makes it an excellent choice for a wide range of digital applications. While the product is now obsolete, its legacy continues to influence the design of modern multiplexing solutions. For engineers and designers seeking a proven and reliable multiplexer solution, the SN74HCT257DT remains a valuable reference point in the development of new and innovative digital systems.

SN74HCT257DT Documents

Download datasheets and manufacturer documentation for SN74HCT257DT