onsemi

74AC521SC  

Linear Comparators

74AC521SC Description

The 74AC521SC is an Identity Comparator IC designed for high-speed digital applications. Manufactured by onsemi, this 8-bit comparator is part of the 74AC series, known for its robust performance and reliability. The device operates within a supply voltage range of 2V to 6V, making it versatile for various power supply configurations. It features a maximum propagation delay of 8.5ns at 5V with a load capacitance of 50pF, ensuring rapid signal processing and minimal latency.

The 74AC521SC is housed in a Surface Mount package, specifically a 20SOIC, which is ideal for compact and high-density PCB designs. The device's quiescent current is as low as 4 µA, contributing to energy efficiency and reduced power consumption. It also supports a maximum output current of 24mA for both high and low states, providing robust drive capabilities for downstream circuits.

74AC521SC Features

• High-Speed Performance: With a maximum propagation delay of 8.5ns at 5V and 50pF, the 74AC521SC ensures rapid and accurate signal comparison, making it suitable for high-speed digital systems.
• Low Power Consumption: The device operates with a quiescent current of only 4 µA, making it energy-efficient and ideal for battery-powered or low-power applications.
• Wide Operating Voltage Range: The 74AC521SC can operate within a supply voltage range of 2V to 6V, providing flexibility in power supply design and compatibility with various systems.
• Robust Output Drive: The IC supports a maximum output current of 24mA for both high and low states, ensuring reliable drive capabilities for downstream circuits.
• Surface Mount Packaging: The 20SOIC package is ideal for compact and high-density PCB designs, facilitating integration into modern electronic systems.
• Active Low Output: The active low output function (A=B) simplifies circuit design and enhances compatibility with other digital components.
• REACH Compliance: The 74AC521SC is REACH unaffected, ensuring compliance with environmental regulations and suitability for global markets.

74AC521SC Applications

The 74AC521SC is ideal for a variety of applications where high-speed digital signal comparison is required. Some specific use cases include:

• Data Processing Systems: The rapid propagation delay and high-speed performance make it suitable for data processing systems where quick and accurate comparisons are essential.
• Memory Management: The 8-bit comparator can be used in memory management systems to verify data integrity and ensure accurate data retrieval.
• Digital Communication Systems: The device's low power consumption and robust output drive capabilities make it ideal for digital communication systems where signal integrity and reliability are critical.
• Automotive Electronics: The wide operating voltage range and surface mount packaging make it suitable for automotive applications where space constraints and varying power supply conditions are common.
• Consumer Electronics: The compact design and low power consumption make it ideal for consumer electronics where energy efficiency and miniaturization are key considerations.

Conclusion of 74AC521SC

The 74AC521SC is a versatile and high-performance Identity Comparator IC that offers significant advantages over similar models. Its combination of high-speed performance, low power consumption, and robust output drive capabilities make it suitable for a wide range of applications. The device's wide operating voltage range, surface mount packaging, and REACH compliance further enhance its suitability for modern electronic systems. Despite being marked as obsolete, the 74AC521SC remains a reliable choice for designers seeking a high-quality comparator solution.

74AC521SC Documents

Download datasheets and manufacturer documentation for 74AC521SC

Datasheets :

74AC521, 74ACT521      

Environmental Information :

onsemi RoHS       onsemi REACH