SN74LS155ADRG4

Overview

The SN74LS155ADRG4 is a dual 2-line to 4-line decoder/demultiplexer from Texas Instruments, belonging to the LS logic series. It features open-collector outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device is housed in a 16-pin SOIC package with dimensions of 10.2 mm length. It supports an operating temperature range from 0°C to 70°C and utilizes standard input regulation.

Feature Summary

• Dual independent 2-to-4 decoding or demultiplexing channels
• Open-collector output configuration for flexible interfacing
• Standard LS logic family compatibility

Applications

• Address decoding in memory systems
• Data distribution in digital circuits
• Control signal routing

Procurement Notes

Verify the suffix 'RG4' indicates tape and reel packaging when ordering. Confirm the manufacturer is Texas Instruments to ensure component authenticity. Check for RoHS compliance status as indicated by the part number designation. Ensure the SOIC-16 package matches the PCB footprint requirements before procurement.

Selection Notes

Select this component when dual independent decoding paths are required within a single package. The open-collector outputs allow for wired-OR connections and level shifting capabilities. Consider the LS series speed and power characteristics relative to system requirements. Verify that the 16-pin SOIC form factor fits the available board space constraints.

Part Context

This component is part of the SN74xxLS series, a widely used line of low-power Schottky TTL logic devices. The SN74155 variant specifically provides dual 2-to-4 functionality, offering a compact solution compared to using two separate single decoders. It serves as a fundamental building block for sequential logic and address selection applications.

Replacement Considerations

Compatible substitutes include SN74LS155N and SN74LS155D. Verify pinout compatibility and electrical specifications match before substitution.