CD74HCT138M96G4

Overview

The CD74HCT138M96G4 is a high-speed CMOS logic decoder manufactured by Texas Instruments. It functions as a 3-to-8 line decoder/demultiplexer housed in a 16-SOIC 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 -55°C to +125°C. Key electrical characteristics include a propagation delay of 48 ns, a maximum static current of 8 uA, and output drive capabilities of 4 mA for both high and low states.

Feature Summary

• Provides three binary selection inputs to decode signals into one of eight active-low outputs.
• Includes two active-low enable inputs and one active-high enable input to facilitate cascading applications.
• Features high-speed silicon gate CMOS technology offering performance comparable to low-power Schottky TTL.

Applications

• Memory address decoding
• Data routing
• Demultiplexing

Procurement Notes

Verify the specific suffix G4 indicates RoHS compliance and green material status as per Texas Instruments documentation. Confirm the SOIC-16 package dimensions match the target PCB footprint. Ensure the 4.5V to 5.5V supply voltage requirements align with the system design. Check that the -55°C to +125°C industrial temperature rating meets environmental specifications.

Selection Notes

Select this component when a single 3-to-8 decoder is required with TTL-compatible input levels. The HCT series ensures compatibility with standard 5V logic systems while maintaining CMOS power efficiency. Consider the 16-SOIC package for surface-mount assembly constraints. Verify that the 48 ns propagation delay satisfies the timing requirements of the target application circuit.

Part Context

This part belongs to the CD74HCT138 family of high-speed CMOS decoders. It is functionally similar to the CD74HC138 but features HCT input structures compatible with TTL logic levels. The M96 suffix typically denotes a specific tape-and-reel packaging configuration intended for automated surface-mount manufacturing processes.

Replacement Considerations

CD74HCT138M96 is a verified equivalent part number within the same product family.