MC74ACT138DTR2G

Overview

The MC74ACT138DTR2G is a high-speed CMOS decoder/demultiplexer from the 74ACT series, manufactured by onsemi. It features a single 3-to-8 line decoding configuration housed in a 16-pin TSSOP surface-mount package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. It provides eight active-low outputs controlled by three address inputs and three enable inputs, ensuring precise signal routing in digital logic applications.

Feature Summary

• Provides one-of-eight decoding functionality with active-low outputs for precise signal selection.
• Incorporates three independent enable inputs to manage device activation and power states effectively.
• Utilizes advanced CMOS technology to deliver high-speed switching capabilities with low static power consumption.

Applications

• Address decoding in microprocessor-based systems
• Signal demultiplexing in data communication circuits
• Memory chip select generation in embedded designs

Procurement Notes

Verify the specific suffix DTR2G confirms the TSSOP-16 package and reel packaging format. Ensure compatibility with 5V logic levels and confirm RoHS compliance requirements match project specifications. Cross-reference the manufacturer part number against official datasheets to validate pinout and electrical characteristics before integration.

Selection Notes

Select this component when a single 3-to-8 decoder is required within the 74ACT family. It is suitable for designs needing active-low outputs and multiple enable controls. Consider the TSSOP-16 footprint for space-constrained PCB layouts. Verify that the 4.5V to 5.5V supply range aligns with the system power architecture.

Part Context

This part belongs to the MC74ACT138 series of decoders and demultiplexers. It shares functional similarities with other 74ACT logic devices but is distinct in its 3-to-8 decoding topology. The DTR2G suffix indicates specific packaging and tape-and-reel handling characteristics defined by onsemi for automated assembly processes.

Replacement Considerations

MC74ACT138DR2G is a confirmed substitute offering identical logical function in a 16-SOIC package. Verify pin compatibility and thermal performance differences between TSSOP and SOIC packages during substitution.