74ACT138SC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74ACT138SC is a high-speed CMOS logic decoder and demultiplexer belonging to the 74ACT series. It features a single 3-to-8 line decoding circuit housed in a 16-pin SOIC surface-mount package. The device operates on a single power supply with a voltage range of 4.5V to 5.5V. It supports an operating temperature range from -40°C to +85°C. Electrical characteristics include output drive currents of 24mA for both high and low states. The component complies with RoHS3 standards and has a Moisture Sensitivity Level (MSL) rating of 1.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides one-of-eight decoding or demultiplexing functionality within a single integrated circuit.
• Utilizes advanced CMOS technology to achieve high-speed switching performance compatible with standard logic families.
• Features active-low outputs that are asserted only when specific enable inputs are in their active states.

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory systems
• Demultiplexing data streams in digital circuits
• Control signal generation in industrial automation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the exact part number suffix against official manufacturer documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing board layouts regarding pin assignments and thermal requirements. Confirm RoHS compliance status if required by specific environmental regulations. Cross-reference datasheet electrical limits with system operating conditions to guarantee reliable performance across the specified temperature range.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a single 3-to-8 decoder is required in a surface-mount application. The 74ACT series offers speed comparable to LS-TTL but with CMOS power consumption. Verify that the system voltage falls within the 4.5V to 5.5V range. Consider the 16-SOIC package dimensions for PCB space constraints. Check availability of direct replacements if supply chain continuity is a priority.

Signal Switches, Multiplexers, Decoders Part Context

This device is part of the widely adopted 74ACT logic family, designed for high-speed digital applications. It serves as a fundamental building block for address decoding and data routing in complex electronic systems. The 74ACT138 variant specifically provides eight mutually exclusive outputs controlled by three binary inputs and three enable pins, ensuring precise signal selection in digital designs.

Signal Switches, Multiplexers, Decoders Replacement Considerations

MC74ACT138DR2G is listed as a direct substitute. CD74ACT138M96 is also identified as an alternative option. Verify pinout compatibility and electrical specifications before substitution.