74HC688D,653

Overview

The Nexperia 74HC688D,653 is an 8-bit magnitude comparator integrated circuit belonging to the 74HC series. It operates within a supply voltage range of 2 V to 6 V and features active low outputs indicating equality (A=B). The device provides a propagation delay of 8 ns at 5 V and 16 ns at 10 V, with a maximum supply current of 8 µA. It is housed in a 20-pin SOIC package (SOT163) and supports surface mount installation. The component functions reliably across an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Performs 8-bit magnitude comparison with active low output for equality detection
• Operates over a wide supply voltage range from 2 V to 6 V
• Supports high-speed logic operations with specified propagation delays
• Designed for industrial temperature environments ranging from -40 °C to +125 °C

Applications

• Digital data comparison circuits
• Address decoding systems
• Error checking logic modules
• Computer peripheral interface control

Procurement Notes

Verify the complete part number including the suffix ,653 to ensure correct packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Validate that the SOIC-20 footprint matches the target PCB layout requirements. Ensure supply chain sources provide authentic Nexperia products to guarantee performance reliability and parameter consistency.

Selection Notes

Select this component when an 8-bit magnitude comparator is required for digital logic applications. Consider the 74HC series compatibility for standard CMOS logic interfaces. Evaluate the 2 V to 6 V operating range against system power constraints. Verify that the 20-pin SOIC package fits the available board space and thermal management requirements.

Part Context

This device is part of the Nexperia 74HC family of high-speed CMOS logic components. It serves as a specialized comparator within the broader portfolio of digital logic integrated circuits. The 74HC series is widely used in consumer electronics and industrial automation due to its compatibility with standard logic families and robust performance characteristics.

Replacement Considerations

Consult official Nexperia documentation for verified substitute part numbers. Cross-reference pinouts and electrical parameters before replacing existing components in established designs.