MC14028BFELG

Overview

The MC14028BFELG is a BCD-to-decimal decoder manufactured by onsemi, housed in an SOEIAJ-16 surface-mount package. It converts four-bit 8421 BCD inputs into one-of-ten decoded outputs and supports three-bit binary inputs for octal decoding with output D forced low. The device operates within a supply voltage range of 3.0 Vdc to 18 Vdc and features diode protection on all inputs. It is designed for positive logic applications and ensures low outputs on illegal input combinations.

Feature Summary

• Provides decimal (one-of-ten) decoding from 8421 BCD codes and octal (one-of-eight) decoding from three-bit binary inputs.
• Includes diode protection on all inputs to guard against high static voltages or electric fields.
• Ensures low outputs on all illegal input combinations for reliable code conversion.
• Capable of driving two low-power TTL loads or one low-power Schottky TTL load over the rated temperature range.

Applications

• Code conversion between binary formats
• Address decoding in memory systems
• Memory selection control circuits
• Demultiplexing signal paths
• Readout decoding for displays

Procurement Notes

Verify that the ordering suffix ELG corresponds to the SOEIAJ-16 package and Pb-Free status as listed in official documentation. Confirm compliance with RoHS directives and check for specific material composition declarations if required. Ensure the component matches the Rev. 6 datasheet specifications before integration.

Selection Notes

Select this part when a CMOS decoder is needed for BCD-to-decimal or binary-to-octal translation. It is suitable for designs requiring operation across a wide voltage range up to 18 Vdc. Consider its ability to interface with TTL loads directly. Verify that the SOEIAJ-16 package fits the board layout constraints.

Part Context

This component belongs to the MC14028B family of decoders. Variants include PDIP-16, SOIC-16, and SOEIAJ-16 packages. The BFELG suffix indicates the specific surface-mount configuration and lead-free manufacturing process. It serves as a functional equivalent to the CD4028B standard.

Replacement Considerations

The CD4028B is documented as a similar device. Verify pin compatibility and electrical characteristics before substitution. Other MC14028B variants with different packages may be used if footprint changes are acceptable.

FAQ

How does the MC14028B handle invalid BCD inputs?

The device is designed to produce low outputs on all illegal input combinations, ensuring predictable behavior during non-standard coding states.

Can the MC14028B perform hexadecimal decoding?

Expanded decoding such as binary-to-hexadecimal can be achieved by using multiple MC14028B devices in conjunction with other logic circuits.