HCF4556BEY

Overview

The HCF4556BEY is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology, functioning as a dual 1-to-4 decoder/demultiplexer. It features two independent decoding sections within a single package. The device operates with a supply voltage range of 3 V to 18 V and supports through-hole mounting in a 16-DIP (0.300 inch, 7.62 mm) package. It is designed for general-purpose digital logic applications requiring address decoding or data distribution.

Feature Summary

• Dual independent 1-to-4 decoding functionality
• Monolithic CMOS construction for reliability
• Wide operating supply voltage capability

Applications

• Digital address decoding systems
• Data distribution networks
• General-purpose logic control circuits

Procurement Notes

Verify the specific suffix 'BEY' against the manufacturer's current datasheet to confirm pinout compatibility and package dimensions. Confirm RoHS compliance status for the specific batch. Check if the component is listed as obsolete or active in official STMicroelectronics catalogs before finalizing procurement plans.

Selection Notes

Select this component when dual independent demultiplexing is required in a compact DIP package. Ensure the application voltage remains within the 3 V to 18 V range. Verify that the through-hole mounting style fits the PCB design constraints compared to surface-mount alternatives.

Part Context

This part belongs to the HCF45xx series of CMOS logic devices from STMicroelectronics. These components are standard industrial-grade logic ICs used for basic digital functions. The HCF4556 specifically provides dual decoding capabilities, distinguishing it from single-channel decoders in the same family.

Replacement Considerations

Check for direct equivalents such as the HCF4556B in different package variants (e.g., SO16) if space constraints change. Verify functional compatibility with other manufacturers' 4000-series CMOS dual decoders, ensuring pinout alignment.