MC14556BCPG

Overview

The MC14556BCPG 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 device operates within a supply voltage range of 3.0 Vdc to 18 Vdc. Propagation delay from select inputs to output ranges from 70 ns to 220 ns depending on voltage and load. Quiescent current per package varies from 5 µA to 600 µA across the operating temperature range.

Feature Summary

• Dual configuration providing two independent 1-of-4 decoding channels in a single package
• Active high or active low output states available for flexible logic interfacing
• Input diode protection included to guard against high static voltages or electric fields
• Outputs are buffered and capable of driving standard TTL loads over the rated temperature range

Applications

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

Procurement Notes

Verify that the ordering suffix 'G' corresponds to the Pb-Free package designation as specified in the manufacturer's documentation. Confirm the PDIP-16 physical package dimensions match the CASE 648 specification sheet. Ensure the component meets the required ambient temperature operating range of -55°C to +125°C for the intended application environment.

Selection Notes

Select this component when dual independent decoding channels are required within a single integrated circuit footprint. The CMOS technology ensures low power consumption compared to bipolar alternatives. Verify that the input voltage levels remain within the specified VSS to VDD range to prevent damage to the high-impedance input circuitry.

Part Context

This part belongs to the MC14555B/MC14556B family of dual binary to 1-of-4 decoder/demultiplexers manufactured by onsemi. The MC14556B variant specifically provides active low outputs, whereas the MC14555B provides active high outputs. Both share identical pinouts and electrical characteristics except for output polarity.

Replacement Considerations

MC14555BCPG serves as a functional substitute if active high outputs are acceptable instead of active low.