MC14028BDR2

Overview

The MC14028BDR2 is a CMOS BCD-to-decimal decoder manufactured by onsemi in an SOIC-16 surface-mount package. It accepts four inputs to provide ten decoded outputs, functioning as a one-of-ten decoder for 8421 BCD codes and a one-of-eight decoder for 3-bit binary codes with the D input forced low. The device operates within a supply voltage range of 3.0 Vdc to 18.0 Vdc and supports ambient temperatures from -55°C to +125°C. Propagation delay ranges from 90 ns to 600 ns depending on voltage, with output drive capabilities sufficient for two low-power TTL loads.

Feature Summary

• Provides decimal decoding for 8421 BCD codes and octal decoding for 3-bit binary inputs
• Includes diode protection on all inputs to guard against high static voltages
• Capable of driving multiple low-power TTL loads across the rated temperature range
• Ensures low logic states on all illegal input combinations

Applications

• Code conversion between binary formats and decimal representations
• Address decoding in memory systems
• Memory selection control circuits
• Demultiplexing applications
• Readout decoding for neon or incandescent displays

Procurement Notes

Verify the specific ordering suffix to confirm the package type and compliance status. The DR2 suffix indicates a tape and reel configuration containing 2500 units in an SOIC-16 package. Confirm RoHS compliance requirements by checking for the G suffix, which denotes a lead-free package. Ensure the procurement request matches the exact pinout and electrical specifications defined in the official datasheet.

Selection Notes

Select this component when a single IC is required to decode four bits into ten distinct active-high lines. It is suitable for designs requiring expanded decoding capabilities through cascading multiple units. Verify that the system supply voltage remains within the 3V to 18V operational window. Consider the propagation delay characteristics relative to the system clock speed to ensure timing margins are met during operation.

Part Context

This part belongs to the MC14000 series of CMOS logic devices produced by onsemi. It serves as a functional equivalent to the CD4028B standard. The series utilizes complementary metal-oxide-semiconductor technology to achieve low power consumption while maintaining robust noise immunity and wide operating voltage ranges suitable for various industrial and consumer electronic applications.

Replacement Considerations

The MC14028BDG is a lead-free variant of the same logical function in the identical SOIC-16 package. Designers should verify pin compatibility and electrical parameter equivalence before substituting components. Ensure that any replacement maintains the required input protection and output drive capabilities specified for the original design constraints.