74VHC138MTC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74VHC138MTC is a high-speed CMOS decoder/demultiplexer belonging to the 74VH logic series. It features three address inputs and eight active-low outputs, housed in a 16-pin TSSOP surface-mount package. The device operates within a supply voltage range of 2 V to 5.5 V and supports a wide operating temperature range from -40°C to +85°C. This component is currently listed as obsolete by the manufacturer.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides one-of-eight decoding or demultiplexing functionality with active-low outputs.

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory or I/O mapping in embedded systems.

Signal Switches, Multiplexers, Decoders Procurement Notes

This component is officially discontinued and no longer in production. Verification of availability should focus on surplus stock or secondary market sources rather than direct manufacturer channels. Buyers must confirm the specific revision level and physical condition of available units, as lead times and authenticity cannot be guaranteed through standard procurement channels.

Signal Switches, Multiplexers, Decoders Selection Notes

Engineers replacing this part should consider the 74VHC138MTCX variant, which offers identical electrical specifications but utilizes tape-and-reel packaging suitable for automated assembly. Alternative logic families such as LVX or HC series may provide similar pinouts but require verification of voltage thresholds and switching speeds to ensure compatibility with existing system requirements.

Signal Switches, Multiplexers, Decoders Part Context

As an obsolete member of the 74VH family, this decoder represents a legacy solution for low-voltage digital logic applications. Its discontinuation reflects industry shifts toward newer generation components with enhanced performance metrics or updated packaging standards. Designers referencing this part number are advised to review current product portfolios for modern equivalents that maintain functional parity while ensuring long-term supply chain stability.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74VHC138MTCX serves as a direct functional substitute with identical electrical characteristics, differing only in its reel-based packaging format for surface-mount technology integration.