MC14555BD

Overview

The MC14555BD is a dual binary-to-1-of-4 decoder/demultiplexer constructed with complementary MOS (CMOS) enhancement mode devices. It features two independent decoders, each with two select inputs (A and B), an active low enable input (E), and four mutually exclusive outputs (Q0–Q3). The device operates within a supply voltage range of 3.0 Vdc to 18 Vdc and supports ambient temperatures from -55°C to +125°C. It includes diode protection on all inputs and buffered outputs capable of driving two low-power TTL loads or one low-power Schottky TTL load.

Feature Summary

• Dual independent 1-of-4 decoding channels with active high outputs
• Expandable architecture for higher-order decoding applications
• Input protection circuitry against static voltages and electric fields
• Buffered outputs compatible with standard TTL logic loads

Applications

• Address decoding in digital systems
• Memory selection control circuits
• Demultiplexing in digital data transmission systems
• Code conversion logic

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-16 package configuration required for your PCB layout. Confirm that the ordering code matches the exact pinout and electrical specifications defined in the official datasheet. Ensure compatibility with your assembly process regarding lead-free requirements if applicable.

Selection Notes

Select this component when dual independent decoding or demultiplexing functions are required within a single package. Consider the MC14556B variant if active low outputs are preferred instead of active high. Evaluate the operating voltage range and temperature stability to ensure they meet the environmental constraints of the target application.

Part Context

This part belongs to the MC14555B/MC14556B family of CMOS logic devices manufactured by onsemi. These components are designed for general-purpose digital logic applications requiring reliable decoding capabilities. The series is characterized by high noise immunity and low power consumption typical of CMOS technology.

Replacement Considerations

MC14556BD serves as a functional alternative offering identical pinouts but with active low outputs.