HCF4028BEY

Overview

The HCF4028BEY is a monolithic BCD to decimal or binary to octal decoder fabricated in Metal Oxide Semiconductor technology, available in a DIP-16 package. It features four buffered inputs (A-D) and ten buffered decoded outputs that go high upon selection. The device operates at medium speed with typical propagation delays of 80ns at VDD=10V. It supports supply voltages from 3V to 20V, includes standardized symmetrical output characteristics, and meets JEDEC JESD13B specifications for B series CMOS devices.

Feature Summary

• Performs BCD to decimal or binary to octal decoding with positive logic inputs and outputs
• Provides high drive capability at all outputs to enhance DC and dynamic performance in high fan-out applications
• Features buffering on all four inputs and ten output buffers

Applications

• Code conversion circuits converting 4-bit codes to decimal or hexadecimal formats
• Neon readout (Nixie tube) display systems
• Address decoding applications using multi-stage configurations

Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm availability through authorized distributors as standard stock may be limited. Ensure design timelines accommodate potential long lead times or end-of-life constraints associated with discontinued semiconductor products.

Selection Notes

Select this component for designs requiring simple BCD-to-decimal translation with high fan-out capabilities. Consider its medium-speed operation and wide supply voltage range suitable for general-purpose digital logic. Evaluate alternative active components if current production volume or long-term supply stability is required for the target application.

Part Context

This part belongs to the HCF4028B family of CMOS logic decoders manufactured by STMicroelectronics. It is designed for use in digital systems requiring one-hot decoding of binary-coded decimal inputs into ten distinct active-high outputs, providing a robust interface between binary data sources and decimal display or control units.

Replacement Considerations

No public confirmed substitute part numbers are documented.