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74HC688D,653

74HC688D,653 Description

The 74HC688D,653 from Nexperia is an 8-bit identity comparator belonging to the 74HC series, designed for high-speed digital logic applications. This surface-mount IC operates within a 2V to 6V supply range, making it compatible with both 3.3V and 5V systems. It features an active-low output that asserts low when the two 8-bit input words are identical (A=B), providing a simple and efficient way to verify data matches. With a maximum propagation delay of 29ns at 6V and 50pF load, it ensures rapid response times for real-time applications. The device is RoHS3 compliant and adheres to REACH regulations, making it suitable for environmentally conscious designs.

74HC688D,653 Features

• 8-bit identity comparator with A=B output function for precise data matching.
• Low quiescent current (8 µA) minimizes power consumption in idle states.
• High output drive capability (5.2mA sink/source) ensures robust signal integrity.
• Wide operating voltage (2V–6V) supports mixed-voltage systems.
• Fast propagation delay (29ns @ 6V, 50pF) for high-speed applications.
• Surface-mount 20SO package in Tape & Reel (TR) for automated assembly.
• Moisture Sensitivity Level (MSL) 1 allows unlimited floor life, simplifying storage and handling.

74HC688D,653 Applications

• Memory address decoding in microcontrollers and FPGAs.
• Data validation in communication systems (e.g., UART, SPI).
• Error detection circuits for ensuring data integrity.
• Industrial control systems requiring fast comparison operations.
• Embedded systems where low power and high speed are critical.

Conclusion of 74HC688D,653

The 74HC688D,653 is a versatile, high-performance comparator ideal for applications demanding fast, reliable data comparison with minimal power consumption. Its wide voltage range, robust output drive, and compact packaging make it a preferred choice for digital logic designs across industries. Whether used in embedded systems, communications, or industrial controls, this IC delivers precision and efficiency, backed by Nexperia’s reliability.