MC14555BDR2

Overview

The MC14555BDR2G is a dual binary to 1-of-4 decoder/demultiplexer constructed with complementary MOS (CMOS) technology. 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. Each output is buffered and capable of driving two Low-Power TTL loads or one Low-Power Schottky TTL load. The package is SOIC-16.

Feature Summary

• Diode protection on all inputs
• Active high or active low outputs available
• Expandable for larger decoding functions
• All outputs are buffered

Applications

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

Procurement Notes

Verify the ordering suffix 'R2G' corresponds to the SOIC-16 tape and reel packaging configuration. Confirm RoHS compliance and Pb-free status as specified in the manufacturer's ordering information. Ensure the specific variant matches the required output logic state (High for MC14555B vs Low for MC14556B).

Selection Notes

Select this component when a dual-channel 1-of-4 decoding function is required within a single package. Choose the MC14555B variant for active-high outputs or the MC14556B for active-low outputs. Consider the NLV prefix if automotive qualification and PPAP capability are necessary for the application environment.

Part Context

This part belongs to the MC14555B/MC14556B family of CMOS decoder/demultiplexers. These devices are designed to replace older transistor-transistor logic (TTL) equivalents with lower power consumption and higher noise immunity. They serve as fundamental building blocks for address decoding and signal routing in digital circuits.

Replacement Considerations

MC14556BDR2G

FAQ

What is the difference between MC14555B and MC14556B?

The MC14555B produces active-high outputs where the selected output goes to the high state. The MC14556B produces active-low outputs where the selected output goes to the low state.

Can the MC14555B be expanded?

Yes, expanded decoding such as binary-to-hexadecimal (1-of-16) can be achieved by using additional MC14555B or MC14556B devices.