onsemi

SN74LS688N

SN74LS688N Description

The SN74LS688N is an 8-bit identity comparator IC designed for high-speed digital applications. Manufactured by onsemi, this device belongs to the 74LS series and is housed in a through-hole 20DIP package. It operates within a supply voltage range of 4.85V to 5.25V and is rated for an operating temperature range of 0°C to 70°C. The SN74LS688N is capable of comparing two 8-bit binary words and providing an active low output when the words are identical.

SN74LS688N Features

• High-Speed Performance: With a maximum propagation delay of 23ns at 5V and a maximum capacitive load of 45pF, the SN74LS688N ensures fast and reliable data comparison.
• Robust Output Characteristics: The IC offers an output high current of 400µA and an output low current of 24mA, making it suitable for driving various types of loads.
• Active Low Output: The active low output function (A=B) simplifies circuit design and ensures compatibility with a wide range of digital systems.
• Through-Hole Mounting: The through-hole mounting type provides a secure and reliable physical connection, ideal for applications requiring high mechanical stability.
• Wide Operating Temperature Range: The 0°C to 70°C operating temperature range makes the SN74LS688N suitable for a variety of industrial and commercial environments.
• Obsolete Status: While the SN74LS688N is marked as obsolete, it remains a valuable component for legacy systems and applications where its specific features are required.

SN74LS688N Applications

The SN74LS688N is ideal for applications requiring fast and accurate comparison of digital data. Its key applications include:

• Digital Systems: Used in digital computers, microprocessors, and other digital systems where data integrity and speed are critical.
• Memory Management: Ideal for memory address decoding and comparison in computer systems.
• Data Processing: Useful in data processing units where rapid comparison of binary data is necessary.
• Control Systems: Employed in control systems for real-time data comparison and decision-making processes.
• Legacy Systems: Suitable for maintaining and upgrading older systems where the SN74LS688N's specific features are integral to the system's functionality.

Conclusion of SN74LS688N

The SN74LS688N is a high-performance 8-bit identity comparator that offers fast propagation delay and robust output characteristics. Its active low output function and through-hole mounting type make it a reliable choice for various digital applications. Despite its obsolete status, the SN74LS688N remains a valuable component for legacy systems and applications requiring its unique features. Its wide operating temperature range and compatibility with standard digital systems ensure its continued relevance in the electronics industry.