SN74AHC139DR

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC139DR is a dual 2-to-4-line decoder/demultiplexer from Texas Instruments, belonging to the AHC logic series. It features two independent decoders, each with two address inputs and four active-low outputs. The device operates within a supply voltage range of 2 V to 5.5 V and supports surface-mount installation in a 16-pin SOIC package. It includes dedicated enable inputs for each decoder section. The component is rated for an operating temperature range of -40°C to +85°C and exhibits a propagation delay of 10.5 ns.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 2-to-4-line decoding functionality
• Active-low output states for precise signal selection
• Wide supply voltage compatibility across industrial standards

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory arrays
• Chip select generation in embedded systems
• Demultiplexing data streams in digital circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix against official documentation to confirm package type and tape/reel specifications. Ensure the ordering part number matches the required RoHS compliance status and moisture sensitivity level. Cross-reference the manufacturer datasheet revision history to validate electrical characteristics before final procurement decisions.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when dual independent decoding is required within a single package footprint. The AHC series offers CMOS performance with TTL-compatible input levels. Consider the 16-pin SOIC package for standard surface-mount assembly processes. Verify that the 2V to 5.5V operating range aligns with the target system power rails.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHC139 family of high-speed CMOS logic devices. It serves as a functional equivalent to legacy 74LS139 designs but with improved speed and lower power consumption. The device is widely used in general-purpose digital logic applications requiring reliable address decoding or data distribution.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHC139DRE4 is a verified alternative variant within the same product line.