


Fairchild (onsemi)
74ACT257SCX
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74ACT257SCX Description
74ACT257SCX Description
The 74ACT257SCX is a surface-mount multiplexer integrated circuit (IC) designed by Fairchild Semiconductor, now part of ON Semiconductor. This IC is part of the 74ACT series and features a 4 x 2:1 multiplexing circuit. It operates on a single supply voltage ranging from 4.5V to 5.5V, making it suitable for a variety of applications requiring efficient signal routing and selection. The 74ACT257SCX is housed in a 16SOIC package and is available in bulk packaging. It is classified under the HTSUS code 8542.39.0001 and is ROHS3 compliant, ensuring environmental sustainability in its manufacturing process.
74ACT257SCX Features
- Single Supply Operation: The 74ACT257SCX operates on a single supply voltage between 4.5V and 5.5V, simplifying power supply requirements and reducing the complexity of the power management system.
- High Current Capability: With an output current capability of 24mA for both high and low states, the 74ACT257SCX can drive a variety of loads without the need for additional buffering.
- Surface Mount Technology: The surface-mount design allows for compact and reliable integration into modern printed circuit boards (PCBs), facilitating high-density layouts and automated assembly processes.
- 4 x 2:1 Multiplexing: The 74ACT257SCX provides four independent 2:1 multiplexing circuits, enabling efficient signal routing and selection in complex systems.
- ROHS3 Compliance: The 74ACT257SCX meets the stringent ROHS3 standards, ensuring that it is free from hazardous substances and suitable for environmentally conscious applications.
- Bulk Packaging: Available in bulk packaging, the 74ACT257SCX is ideal for high-volume production runs, providing cost-effective and efficient procurement options.
74ACT257SCX Applications
The 74ACT257SCX is well-suited for a range of applications where signal routing and selection are critical. Its high current capability and single supply operation make it particularly useful in:
- Digital Signal Processing: Efficiently routing digital signals in complex systems, such as those found in telecommunications and data processing equipment.
- Automotive Electronics: Managing multiple sensor inputs and control signals in automotive applications, where reliability and compact design are paramount.
- Industrial Control Systems: Selecting and routing signals in industrial automation and control systems, ensuring precise control and monitoring.
- Consumer Electronics: Enabling signal switching in consumer devices, such as multimedia systems and smart home appliances, where space and power efficiency are essential.
Conclusion of 74ACT257SCX
The 74ACT257SCX is a versatile and reliable multiplexer IC that offers significant advantages over similar models. Its single supply operation, high current capability, and surface-mount design make it an ideal choice for a wide range of applications in the electronics industry. While the product is now classified as obsolete, its robust design and performance characteristics ensure that it remains a valuable component for legacy systems and specific applications where its unique features are required. For engineers and designers seeking a compact, efficient, and environmentally friendly multiplexing solution, the 74ACT257SCX is a compelling option.



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