HCF4512BEY

Overview

The HCF4512BEY is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology, available in DIP-16 and SOP packages. It functions as an 8-channel data selector featuring three-state outputs designed to interface directly with bus-oriented system data lines. The device supports supply voltages from 3V to 20V and operates within a temperature range of -55°C to +125°C. It includes standardized symmetrical output characteristics and meets JEDEC JESD13B specifications for B series CMOS devices.

Feature Summary

• Features eight selectable channel inputs controlled by three address bits
• Provides three-state outputs capable of driving standard TTL loads
• Includes dedicated inhibit and 3-state disable control pins
• Supports direct interfacing with bus-oriented system architectures

Applications

• Bus-oriented system data line interfacing
• Multiplexing applications requiring high-impedance states
• Digital logic circuits utilizing common busing configurations

Procurement Notes

Verify the specific package variant required, as the base part number covers both DIP and SOP formats. Confirm that the design accommodates the specified operating voltage and temperature ranges. Ensure compatibility with existing bus protocols before integration. Review absolute maximum ratings to prevent damage during transient conditions.

Selection Notes

Select this component when an 8-to-1 multiplexer with tri-state capability is required for bus systems. Consider the wide supply voltage range and robust noise margins for industrial environments. Evaluate the propagation delay specifications against system timing requirements. Verify package availability if surface-mount or through-hole mounting is preferred.

Part Context

This device belongs to the HCF45xxB series of legacy high-voltage CMOS logic functions. These components are characterized by radiation hardness and hermetic packaging options in certain variants, though the HCF4512BEY specifically denotes the plastic DIP package version. The series offers high noise tolerance and broad operational flexibility for harsh environment applications.

Replacement Considerations

HCF4512BM1 (SOP package equivalent)

FAQ

How does the Inhibit input function?

A logic high on the INHIBIT input switches all six outputs to logic low, provided the OUTPUT DISABLE input is at logic low.

What is the purpose of the 3-State Disable pin?

Applying a logic high to the 3-State Disable input places all outputs into a high-impedance state, allowing for common busing of multiple devices.