MC14556BD

Overview

The MC14556BD is a dual binary-to-1-of-4 decoder/demultiplexer from the Motorola 4000B series, housed in a 16-SOIC package. It integrates two independent decoding circuits within a single device. The component operates on a supply voltage range of 3.0 Vdc to 18 Vdc and supports an operating temperature range of -55°C to 125°C. It features diode protection on all inputs and offers expandable configurations for multiple decoding or demultiplexing functions.

Feature Summary

• Integrates two independent 1x2:4 decoder/demultiplexer circuits
• Features diode protection on all input pins
• Supports active high or active low output configurations
• Allows for expandable cascading applications

Applications

• Digital signal routing and switching
• Address decoding in memory systems
• Data distribution in digital logic circuits
• Industrial control system interfaces

Procurement Notes

Verify the manufacturer marking matches Motorola or ON Semiconductor specifications. Confirm the 16-SOIC package type and ensure the part number suffix 'BD' corresponds to the specified tape-and-reel or tube packaging if required by your assembly process. Check for authenticity markers to avoid counterfeit components.

Selection Notes

Select this component when dual independent decoding channels are required in a compact surface-mount form factor. Ensure the design accommodates the wide supply voltage range and consider the thermal characteristics for operation within the specified -55°C to 125°C ambient temperature limits. Verify compatibility with existing logic levels.

Part Context

This device belongs to the 4000B series of CMOS logic devices, known for their robust performance and wide operating voltage capabilities. The MC14556BD specifically addresses applications requiring multiple decoding functions without consuming excessive board space compared to using separate single decoders.

Replacement Considerations

Check for direct pin-compatible substitutes such as the MC14556B variant. Verify that any alternative maintains the same 16-SOIC footprint and electrical characteristics, particularly the supply voltage range and output drive capability.