Texas Instruments

SN54ALS688J  

Linear Comparators

SN54ALS688J Description

The SN54ALS688J is an 8-bit identity comparator designed for high-speed digital applications. Manufactured by Texas Instruments, this device belongs to the 54ALS series and is housed in a through-hole package, making it suitable for a variety of industrial and commercial applications. The SN54ALS688J operates within a supply voltage range of 4.5V to 5.5V and features an active low output function, providing a clear indication when the input values are equal (A=B).

This identity comparator offers a maximum propagation delay of 25ns at 5V with a maximum capacitive load of 50pF, ensuring fast and reliable signal processing. The device consumes a quiescent current of 19mA, making it energy-efficient for continuous operation. The output current capabilities are rated at 1mA for high and 12mA for low, providing robust performance under various load conditions.

The SN54ALS688J is REACH unaffected and RoHS3 compliant, adhering to stringent environmental and safety standards. Its moisture sensitivity level (MSL) is not applicable, making it suitable for a wide range of operating environments.

SN54ALS688J Features

• High-Speed Performance: With a maximum propagation delay of 25ns at 5V and 50pF, the SN54ALS688J ensures rapid signal processing, ideal for high-speed digital systems.
• Low Quiescent Current: Consuming only 19mA, this comparator is designed for energy efficiency, making it suitable for applications where power consumption is a critical factor.
• Robust Output Current: Capable of delivering 1mA for high and 12mA for low outputs, the SN54ALS688J can drive various loads effectively.
• Wide Supply Voltage Range: Operating between 4.5V and 5.5V, the device offers flexibility in power supply requirements.
• Active Low Output: The active low output function provides a clear indication when the input values are equal, simplifying circuit design and reducing complexity.
• Environmental Compliance: REACH unaffected and RoHS3 compliant, ensuring the device meets environmental and safety standards.
• Through-Hole Mounting: The through-hole package type facilitates easy integration into existing systems and provides mechanical stability.

SN54ALS688J Applications

The SN54ALS688J is ideal for applications requiring fast and accurate comparison of digital signals. Some specific use cases include:

• Digital Signal Processing: Utilized in systems where rapid comparison of digital signals is necessary, such as in data acquisition and processing units.
• Memory Systems: Employed in memory management units to compare address lines, ensuring data integrity and efficient memory access.
• Communication Systems: Used in communication interfaces to compare and validate data streams, enhancing reliability and performance.
• Control Systems: Integrated into control systems for real-time monitoring and comparison of control signals, enabling precise control and feedback mechanisms.

Conclusion of SN54ALS688J

The SN54ALS688J is a versatile and high-performance 8-bit identity comparator that offers significant advantages over similar models. Its fast propagation delay, low quiescent current, and robust output current capabilities make it an ideal choice for a wide range of high-speed digital applications. The device's environmental compliance and through-hole mounting type further enhance its suitability for various industrial and commercial environments. Whether used in digital signal processing, memory systems, communication interfaces, or control systems, the SN54ALS688J provides reliable and efficient performance, making it a valuable component in modern electronic designs.

SN54ALS688J Documents

Download datasheets and manufacturer documentation for SN54ALS688J

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SN54ALS688J