HCF4518BEY

Counter Dividers Overview

The HCF4518BEY is a dual BCD up counter fabricated in Metal Oxide Semiconductor technology, available in DIP-16 packaging. It contains two identical four-stage counters using D-type Flip-Flops with interchangeable Clock and Enable lines for positive or negative edge triggering. The device supports synchronous internal carry propagation and cascading in ripple mode. Key electrical parameters include a typical medium speed operation of 6MHz at 10V supply. Quiescent current is specified up to 20V, with input leakage current limited to 100nA maximum at VDD=18V and 25°C. It meets JEDEC JESD13B standards for B series CMOS devices.

Counter Dividers Feature Summary

• Dual independent BCD up counters with interchangeable clock and enable inputs
• Supports both positive-going and negative-going edge triggering
• Synchronous internal carry propagation for efficient cascading
• High noise margin with specified quiescent current testing

Counter Dividers Applications

• Ripple cascading of multiple counters for extended counting ranges
• Digital frequency division circuits
• BCD decoding logic interfaces
• Synchronous digital system timing control

Counter Dividers Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors. Confirm package type matches DIP-16 requirements. Check datasheet revisions for any parameter updates. Ensure storage conditions adhere to specified temperature ranges. Validate pin compatibility with existing PCB footprints before integration.

Counter Dividers Selection Notes

Select this component when dual independent BCD counting is required within a single package. Consider the interchangeable clock/enable functionality for flexible trigger configuration. Evaluate power supply voltage ranges against application needs. Assess propagation delay specifications relative to system clock speeds. Verify operating temperature range compatibility with environmental constraints.

Counter Dividers Part Context

The HCF4518B belongs to STMicroelectronics' HCF series of high-speed CMOS logic devices. This series adheres to JEDEC JESD13B standards for B series CMOS components. The device represents a monolithic integration of dual counters, offering space efficiency compared to discrete solutions. It utilizes standard Metal Oxide Semiconductor fabrication techniques for reliable performance across industrial temperature ranges.

Counter Dividers Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided documentation. Consult official STMicroelectronics replacement guides for equivalent dual BCD counters. Verify pinout compatibility and electrical characteristics match before substitution.