SN74AHC138DRE4

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC138DRE4 is a 3-line to 8-line decoder and demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 5.5 V and features low dynamic power consumption. The device utilizes CMOS technology for high-speed operation with propagation delays typically around 13 ns at 5 V. It includes three enable inputs to facilitate system expansion and hierarchical design. The component is housed in a TSSOP-16 package, suitable for surface-mount applications across industrial temperature ranges.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides decoding or demultiplexing functions from three binary-coded address lines to eight active-low outputs.
• Incorporates three enable inputs (two active-low and one active-high) to manage chip selection and system expansion.
• Features low static power dissipation characteristic of CMOS architecture while maintaining high-speed switching capabilities.

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory mapping in embedded systems
• Demultiplexing data streams in communication interfaces
• Control logic for peripheral selection in microcontroller-based designs

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'E4' indicates lead-free composition and RoHS compliance as per manufacturer standards. Confirm the TSSOP-16 package dimensions match your PCB footprint requirements. Ensure the operating voltage range aligns with your system's power supply rails. Check for any automotive or extended temperature variants if your application demands higher reliability beyond standard commercial grades.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a low-power, high-speed decoder is required for 3-to-8 line translation. It is suitable for applications needing multiple enable controls for complex system integration. Consider the TSSOP-16 package size against available board space. Compare propagation delay specifications with other AHC series devices if timing constraints are critical for your specific signal integrity requirements.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHC138 family of decoders and demultiplexers. It shares functional compatibility with other members of the AHC series but differs in packaging and environmental compliance markings. The 'DRE4' suffix specifically denotes the TSSOP-16 tape and reel format with lead-free construction, distinguishing it from DIP or SOIC variants within the same logical family.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHC138DRG4: Pin-compatible alternative with similar electrical characteristics and lead-free status. SN74AHCT138DRE4: Compatible if the system operates strictly at 5V and requires TTL-compatible input thresholds instead of CMOS levels. Verify output drive strength and enable logic polarity before substitution.