SN74AHC138NS

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC138NS is a 3-line to 8-line decoder/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 includes three enable inputs for cascading or system control. It utilizes a DIP-16 package and supports an operating temperature range from -40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides decoding functionality converting three binary inputs into eight mutually exclusive active-low outputs
• Incorporates three independent enable inputs to manage device activation and signal routing
• Designed for low power dissipation suitable for battery-powered applications

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory and I/O mapping in embedded systems
• Demultiplexing data streams in digital communication circuits
• Control logic for peripheral selection in microcontroller interfaces

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'NS' against the manufacturer's official documentation to confirm the exact package type and tape/reel specifications. Ensure the component meets RoHS compliance requirements for your region. Cross-reference the ordering part number with the latest datasheet revision to avoid discrepancies in pinout or electrical characteristics.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a wide supply voltage range is required compared to standard 5V-only logic families. Consider the DIP-16 package for prototyping or through-hole assembly needs. Evaluate the propagation delay and output drive current against the load capacitance requirements of the target circuit design.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the AHC (Advanced High-speed CMOS) logic family, which offers performance comparable to LS-TTL but with lower power consumption. The 138 series specifically denotes a 3-to-8 line decoder configuration. It serves as a modern replacement for older bipolar logic families in general-purpose digital applications.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Compatible alternatives include the SN74AHC138PWR for surface mount applications and the SN74AHCT138DR for TTL-compatible input levels. Verify pin compatibility and electrical parameters before substitution.