SN74ALS138ADG4

Signal Switches, Multiplexers, Decoders Overview

The SN74ALS138ADG4 is a high-speed ALS-series decoder/demultiplexer manufactured by Texas Instruments. It converts three binary-coded address inputs into one of eight active-low outputs, controlled by three enable inputs. The device operates within a standard 5V logic supply range and features low power consumption characteristic of the Advanced Low-Power Schottky family. Packaged in a 16-pin SOIC (DG) format, it provides reliable signal routing for digital systems requiring precise address decoding or data distribution.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides exclusive decoding of three-bit binary addresses to eight distinct active-low output lines
• Incorporates three independent enable inputs to manage chip activation and prevent unintended signal propagation
• Utilizes Advanced Low-Power Schottky technology to balance switching speed with reduced power dissipation

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in microprocessor-based memory systems
• Data distribution in digital communication networks
• Control signal generation for peripheral device selection

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'DG4' confirms the lead-free status and RoHS compliance as per manufacturer specifications. Ensure the SOIC-16 package dimensions match your PCB footprint requirements. Confirm that the ALS logic voltage levels are compatible with your system's input thresholds before finalizing procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when design constraints require lower power consumption than standard TTL while maintaining faster switching speeds than LS series devices. The SOIC package is suitable for surface-mount assembly processes. Verify that the three-enable input architecture fits your control logic scheme without requiring additional gating components.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the Texas Instruments SN74ALS138A family, representing an evolution from earlier S and LS series decoders. The ALS designation indicates the use of Advanced Low-Power Schottky semiconductor technology, which offers improved performance metrics over legacy counterparts while maintaining pin compatibility with standard 74-series logic families.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Compatible substitutes include the SN74ALS138AN for through-hole applications and other SN74ALS138 variants with different packaging options. Cross-referencing with equivalent parts from other manufacturers requires verifying identical logic truth tables and electrical characteristics.