MC74ACT139DTR2G

Overview

The MC74ACT139DTR2G is a dual 1-of-4 decoder/demultiplexer from the 74ACT logic series, manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V and features surface-mount TSSOP-16 packaging. The device supports an operating temperature range from -40°C to +85°C. It contains two independent decoding circuits, each with one input line and four output lines, designed for high-speed digital signal routing applications.

Feature Summary

• Dual independent 1-to-4 decoding architecture
• High-speed CMOS technology compatible with TTL levels
• Low power consumption characteristics

Applications

• Address decoding in memory systems
• Data routing in communication interfaces
• Chip select generation in microprocessor designs

Procurement Notes

Verify the complete part number including the suffix 'G' to ensure RoHS compliance and lead-free status. Confirm the TSSOP-16 package variant matches the design footprint. Check the latest datasheet for any pinout revisions or electrical parameter updates before finalizing the component selection for production.

Selection Notes

Select this component when dual independent decoding channels are required in a compact surface-mount package. Ensure the system voltage remains within the 4.5 V to 5.5 V range. Consider the propagation delay specifications if timing constraints are critical for the specific application interface.

Part Context

This part belongs to the MC74ACT family, which combines the speed of AC logic with CMOS low power consumption. It serves as a functional alternative to older bipolar logic families while offering improved noise immunity and drive capability suitable for modern digital systems requiring efficient address decoding.