MC14556BDR2

Overview

The MC14556BDR2G is a dual binary-to-1-of-4 decoder/demultiplexer constructed with complementary MOS (CMOS) enhancement mode devices. It contains two independent decoders, each featuring two select inputs (A and B), an active low Enable input (E), and four mutually exclusive outputs (Q0–Q3). The selected output transitions to the 'low' state. Expanded decoding capabilities are achieved by cascading multiple units.

Feature Summary

• Features diode protection on all inputs for enhanced static voltage tolerance
• Outputs are buffered and capable of driving standard TTL loads
• Supports expandable configurations for higher-order decoding applications

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required package type and lead-free status. Confirm the specific device variant corresponds to the desired logic polarity. Ensure environmental compliance documentation aligns with project requirements before finalizing procurement orders.

Selection Notes

Select this component when a dual-channel 1-of-4 decoding function is required within a single integrated circuit. Consider the MC14555B if high-state active outputs are preferred instead of low-state. Evaluate power supply constraints against the specified operating range during system design.

Part Context

This part belongs to the MC1455xB family of CMOS logic devices manufactured by onsemi. It serves as a functional alternative to legacy decoder designs, offering improved noise immunity and lower power consumption compared to older transistor-transistor logic implementations while maintaining compatible pinouts.

Replacement Considerations

MC14555BDR2G provides identical physical dimensions but utilizes active-high outputs.