SN74LS139ADRE4

Overview

The SN74LS139ADRE4 is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments 74LS series. It operates on a single power supply ranging from 4.75V to 5.25V. The device features Schottky clamping for high performance and standard input regulation. It is housed in a 16-pin SOIC package with an operating temperature range of 0°C to 70°C. The component includes two independent decoding circuits, each converting two binary inputs into four mutually exclusive outputs.

Feature Summary

• Dual independent 2-to-4 decoding channels
• Schottky-clamped logic for high-speed operation
• Standard TTL-compatible input regulation

Applications

• Address decoding for memory arrays
• Demultiplexing data streams
• Control signal distribution in industrial systems

Procurement Notes

Verify the E4 suffix indicates lead-free composition and RoHS compliance. Confirm the SOIC-16 package dimensions match design constraints. Ensure the 0°C to 70°C commercial temperature rating aligns with environmental requirements. Cross-reference the manufacturer part number against official TI documentation to validate authenticity.

Selection Notes

Select this component when standard LS-TTL voltage levels are required. The dual-channel architecture reduces board space compared to single decoders. Verify that the 8mA output current capability meets load requirements. Consider the SOIC package for surface-mount assembly compatibility.

Part Context

This part belongs to the widely used 74LS (Low-power Schottky) logic family. It provides a balance between speed and power consumption typical of bipolar TTL technology. The device serves as a foundational building block for digital address decoding and data routing applications in legacy and mixed-signal designs.

Replacement Considerations

SN74LS139ADR is the non-rohs variant. SN74LS139ADRG4 is the green compliant alternative.