54ACT138DM

Overview

The 54ACT138DM is a high-speed CMOS decoder/driver from the ACT series, manufactured by National Semiconductor. It features inverted outputs and operates on a standard 5 V supply voltage within a range of 4.5 V to 5.5 V. The device utilizes a PDIP-16 plastic DIP package and is rated for military temperature levels, supporting operation between -55 °C and 125 °C. It exhibits a typical propagation delay of 17 ns.

Feature Summary

• High-speed CMOS logic technology
• Inverted output configuration
• Military temperature rating

Applications

• Memory decoding systems
• Data routing applications
• Demultiplexing circuits

Procurement Notes

Verify the manufacturer origin, as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific package variant matches the required footprint. Ensure the component meets the necessary environmental standards for the intended deployment environment.

Selection Notes

Select this component when a high-speed, low-power CMOS decoder with inverted outputs is required. The ACT series offers superior speed compared to standard LS TTL while maintaining CMOS power efficiency. Verify that the 16-pin DIP form factor aligns with the target PCB layout constraints.

Part Context

This part belongs to the 54ACT family of high-speed CMOS logic devices. It serves as a functional equivalent to other industry-standard 3-to-8 line decoders but provides improved switching speeds and lower power consumption characteristics suitable for demanding digital system architectures.

Replacement Considerations

Consider the CD54ACT138H or UT54ACTS138-PVX as potential substitutes based on functional compatibility and pinout alignment.