SN74AHC138DRG4

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC138DRG4 is a single 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 a TSSOP-16 surface-mount package and supports an operating temperature range from -40°C to +125°C. Propagation delay is specified at 13 ns, with output drive capabilities of 8 mA for both high and low states.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides one-of-eight decoding or demultiplexing functionality using three binary address inputs.
• Features three enable inputs that allow for cascading multiple devices without additional logic gates.
• Outputs are active-low, ensuring direct compatibility with various digital logic families.

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in microprocessor-based systems
• Demultiplexing data streams in communication interfaces
• Memory chip select generation in embedded designs

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix G4 indicates lead-free and RoHS compliance status against current manufacturer documentation. Confirm the TSSOP-16 package dimensions match your PCB footprint requirements. Ensure the active-low output polarity aligns with your circuit design before finalizing procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a low-voltage CMOS decoder with wide temperature tolerance is required. The AHC series offers faster switching speeds compared to standard HC logic while maintaining lower power consumption. Verify that the 8 mA output current meets the load requirements of your connected circuits.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHC138 family of decoders. It serves as a high-speed CMOS alternative to legacy TTL logic, offering improved noise immunity and reduced power dissipation. The DRG4 designation specifies the TSSOP-16 package variant produced by Texas Instruments.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHCT138DRG4: Compatible if system operates strictly at 5 V logic levels; otherwise voltage mismatch may occur. SN74AHC138DRE4: Direct functional equivalent with different manufacturing revision code but identical electrical specifications.