CD54HC4520F

Counter Dividers Overview

The CD54HC4520F is a high-speed CMOS logic dual binary up-counter manufactured by Texas Instruments. It consists of two independent internally synchronous 4-stage counters housed in a 16-pin ceramic dual in-line package (CDIP). The device operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -55°C to 125°C. Each counter stage utilizes D-type flip-flops with interchangeable clock and enable lines, allowing for incrementing on either positive-going or negative-going transitions. The maximum clock frequency reaches 20 MHz at 4.5V and 24 MHz at 6V.

Counter Dividers Feature Summary

• Supports positive or negative edge triggering via interchangeable clock and enable lines
• Features synchronous internal carry propagation for reliable counting operations
• Provides balanced propagation delay and transition times across the operating range

Counter Dividers Applications

• Military and defense applications requiring QML certification
• High-speed digital counting systems
• Industrial control environments with wide temperature requirements

Counter Dividers Procurement Notes

Verify that the specific part number matches the required military-grade specifications and ceramic packaging. Confirm the ordering suffix corresponds to the intended tube quantity and lead finish. Ensure compatibility with existing system voltage levels and temperature constraints before finalizing procurement orders.

Counter Dividers Selection Notes

Select this component when dual independent binary counters are required in a ruggedized environment. The HC series offers significant power reduction compared to LSTTL logic families while maintaining high noise immunity. Consider the HCT variant if direct LSTTL input logic compatibility is necessary for the interface design.

Counter Dividers Part Context

This device belongs to the Texas Instruments High-Speed CMOS Logic family. It serves as the military-grade counterpart to the commercial CD74HC4520. The CD54HC4520F is specifically qualified for Military and Defense Applications under QML standards, ensuring reliability in harsh operational conditions where standard catalog parts may not suffice.

Counter Dividers Replacement Considerations

The CD74HC4520E is the commercial equivalent offering identical logical functionality but without military qualification. For applications requiring LSTTL input compatibility, the CD74HCT4520 series provides a suitable alternative within the same functional family.