SN74AHCT139D

Signal Switches, Multiplexers, Decoders Overview

The SN74AHCT139D is a dual 2-to-4-line decoder/demultiplexer from the Texas Instruments AHCT logic family. It operates within a supply voltage range of 4.5 V to 5.5 V and features low input current with fully buffered inputs. The device provides two independent decoders, each with active-low outputs and enable inputs. It is housed in a 16-pin SOIC package and supports surface-mount installation. The component functions reliably across an operating temperature range of -40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 2-to-4 line decoding capability
• Active-low output states for precise signal selection
• Compatible with standard CMOS logic families via AHCT technology
• Low power consumption characteristics suitable for battery-operated systems

Signal Switches, Multiplexers, Decoders Applications

• Memory address decoding in embedded systems
• Data routing and demultiplexing applications
• Industrial control system signal distribution
• Consumer electronics logic interfacing

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'D' indicates the SOIC package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the ordering part number matches the required pin configuration and thermal specifications for your PCB layout design.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when AHCT compatibility with 5V CMOS systems is required alongside HC-level performance. Consider the SOIC package dimensions for board space constraints. Evaluate the propagation delay and power dissipation requirements against system timing budgets before finalizing the design choice.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHCT139 series, which integrates high-speed CMOS technology with TTL-compatible input thresholds. The series is designed for general-purpose digital logic applications requiring reliable decoding functions. It serves as a foundational building block for complex digital circuits needing address or data line management.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Cross-reference with SN74AHCT139DR for reel packaging variants. Verify functional equivalence with SN74HCT139 series parts if HC-level speed suffices. Check Nexperia 74AHC139D for automotive-grade alternatives if higher temperature ratings are needed.