HCF4532BEY

Overview

The HCF4532BEY is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology, functioning as an 8-bit priority encoder. It encodes the highest priority active input from eight data lines (D7-D0) into a 3-bit binary code on output lines Q2-Q0. The device features a chip enable input (EI), a group select line (GS), and an enable output (EO) for cascading multiple units. It operates within a supply voltage range of 3V to 20V and meets JEDEC JESD13B standards for B series CMOS devices.

Feature Summary

• Encodes the highest priority active input among eight data lines into a 3-bit binary code
• Includes chip enable, group select, and enable output pins for cascading capability
• Provides standardized symmetrical output characteristics across specified parametric ratings
• Features low quiescent current specifications up to 20V supply

Applications

• Keyboard encoding systems
• Digital-to-analog conversion interfaces
• Cascaded priority encoder configurations

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm package type matches DIP-16 requirements. Check datasheet revision history for any updates to truth tables or electrical characteristics. Ensure handling procedures comply with ESD protection guidelines for CMOS devices. Review obsolete product status implications for long-term availability.

Selection Notes

Select this component when an 8-input priority encoding function is required in CMOS logic designs. Consider the 3V to 20V operating range for compatibility with various supply voltages. Evaluate the DIP-16 package suitability for through-hole mounting applications. Assess propagation delay characteristics against system timing requirements at specific supply voltages.

Part Context

The HCF4532B belongs to the HCF series of high-performance CMOS logic devices manufactured by STMicroelectronics. This series adheres to JEDEC JESD13B standards for B series CMOS devices, ensuring standardized performance parameters. The HCF4532B specifically provides combinational logic functionality for priority encoding applications within industrial and consumer electronics systems.

Replacement Considerations

HCF4532BM1: SOP-16 package variant of the same functional device.