74VHCT138ASJX

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74VHCT138ASJX is a high-speed CMOS decoder/demultiplexer belonging to the VHCT series. It features a 3-to-8 line decoding architecture with active-low outputs, enabling precise data routing and memory address selection. The device incorporates three enable inputs for flexible cascading and system integration. Designed for operation within a 4.5V to 5.5V supply range, it ensures compatibility with standard TTL logic levels while maintaining low power consumption characteristics typical of CMOS technology.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides 3-to-8 line decoding functionality with inverted active-low outputs
• Features three enable inputs to facilitate complex cascading configurations
• Ensures voltage level translation compatibility between CMOS and TTL logic families

Signal Switches, Multiplexers, Decoders Applications

• Memory address decoding in embedded systems
• Data routing and demultiplexing applications
• Control signal generation for peripheral devices

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the specific suffix 'SJX' corresponds to the required tape-and-reel packaging configuration rather than tube packaging. Confirm RoHS compliance status and lead-free material declarations directly with the manufacturer or authorized distributor documentation prior to procurement to ensure adherence to environmental regulations.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a 3-to-8 decoder with active-low outputs is required for 5V logic systems. Ensure the design utilizes the VHCT series benefits for direct TTL input compatibility. Verify that the package type matches the PCB footprint requirements and that the operating temperature range aligns with the intended application environment.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the widely adopted 74VHCT logic family, designed to bridge the gap between older TTL standards and modern CMOS performance. The 74VHCT138 variant specifically addresses applications requiring efficient signal distribution and address decoding within digital control circuits, offering a balance of speed and power efficiency.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Compatible substitutes include ON Semiconductor's 74VHCT138AMTCX and Toshiba's TC74VHCT138AFK. These alternatives maintain identical logical functionality and pinout configurations, ensuring seamless integration into existing designs without requiring schematic modifications.