CD74HC173EX

Overview

The CD74HC173EX is a quad D-type edge-triggered flip-flop manufactured by Harris Corporation, belonging to the HC-CMOS logic family. It features four independent D-type flip-flops with positive-edge triggering and true outputs. The device supports a supply voltage range of 2V to 6V and operates within a temperature range of -55°C to 125°C. It is housed in a 16-pin plastic dual in-line package (PDIP). Key electrical parameters include a maximum operating frequency of 20 MHz at nominal supply, a maximum output current of 6 mA, and a load capacitance of 50 pF.

Feature Summary

• Contains four independent D-type flip-flops with positive-edge clock triggering
• Provides true outputs without inversion for direct signal processing
• Supports wide supply voltage operation from 2V to 6V
• Features high-impedance three-state outputs for bus driving applications

Applications

• Data storage registers in digital systems
• Shift register configurations for serial-to-parallel conversion
• Timing control circuits requiring precise edge-triggered state changes
• Buffer memory elements in microprocessor interfaces

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm that the part number matches the specific Harris Corporation designation. Check for compliance with relevant environmental standards as indicated in the datasheet. Ensure handling procedures adhere to electrostatic discharge precautions for CMOS devices. Review technical specifications against application requirements before procurement.

Selection Notes

Select this component when designing circuits requiring multiple synchronized data storage elements with wide voltage tolerance. Consider the HC series characteristics for compatibility with standard logic families. Evaluate the PDIP package suitability for through-hole mounting requirements. Assess thermal performance capabilities given the extended industrial temperature range. Verify interface timing constraints against the specified propagation delay parameters.

Part Context

This component belongs to the 74HC logic family, representing high-speed CMOS technology developed for general-purpose digital applications. Harris Corporation produced this variant as part of their comprehensive line of compatible logic integrated circuits. The device maintains pinout compatibility with industry-standard equivalents while offering enhanced performance characteristics typical of the HC series architecture.

Replacement Considerations

Compatible substitutes include Texas Instruments SN74HC173N and Intersil/Maxim IC74HC173 variants. These alternatives maintain identical logical functionality and pin configuration. Verify package dimensions and electrical specifications match original requirements. Ensure replacement parts meet the same temperature and voltage operating ranges.