MC74ACT138DR2

Overview

The MC74ACT138DR2 is a high-speed CMOS logic device manufactured by onsemi, functioning as a 3-to-8 line decoder/demultiplexer. It operates within a supply voltage range of 2.7V to 3.6V and features low power consumption typical of ACT series technology. The component utilizes a 16-pin SOIC surface-mount package, designed for efficient space utilization in printed circuit board layouts. It provides three enable inputs to control operation and eight active-low outputs, ensuring precise signal routing in digital systems.

Feature Summary

• High-speed CMOS technology ensures fast propagation delays and reliable switching performance.
• Low power consumption characteristics reduce overall system energy usage during operation.
• Three independent enable inputs allow flexible configuration and cascading capabilities.

Applications

• Address decoding in memory systems
• Data distribution in digital communication circuits
• Control signal generation in microprocessor interfaces

Procurement Notes

Verify the exact ordering suffix DR2 confirms the tape-and-reel packaging format and specific temperature grade. Confirm that the manufacturer designation matches onsemi specifications for the ACT series. Ensure compatibility with standard 3.3V logic levels before integration into existing designs.

Selection Notes

Select this component when designing systems requiring 3-to-8 decoding with low power constraints. Consider the 16-pin SOIC package for surface-mount assembly requirements. Evaluate the operating voltage range against the target system's power supply stability.

Part Context

This part belongs to the 74ACT family of logic devices, known for balancing speed and power efficiency. It serves as a standard solution for address decoding and data routing tasks in consumer electronics and industrial control applications where compact form factors are essential.

Replacement Considerations

Check for direct pin-compatible alternatives from other manufacturers offering similar ACT specifications. Verify electrical parameters such as propagation delay and output drive current match original design requirements before substitution.