SN74AHC138PW

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC138PW is a single 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 utilizes CMOS technology and provides eight active-low outputs controlled by three address inputs and three enable inputs. It is housed in a 16-pin TSSOP package with a maximum propagation delay of 13 ns at 5 V.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides high-speed decoding with low propagation delay for efficient signal routing
• Features low static and dynamic power consumption suitable for battery-powered applications
• Includes three enable inputs to facilitate system expansion and cascading

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory and I/O 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 'PW' confirms the TSSOP-16 package variant when sourcing. Ensure compatibility with the target PCB footprint and reflow soldering profile. Confirm RoHS compliance status if required by local regulations. Check for moisture sensitivity level (MSL) ratings to determine storage and handling requirements before assembly.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring low voltage operation down to 2 V. Compare against HC series variants if higher drive current is needed, or HCS series for automotive qualification. Consider the TSSOP package constraints regarding thermal dissipation and board space. Verify input thresholds match the driving logic family voltage levels.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the AHC (Advanced High-Speed CMOS) logic family, offering improved speed and lower power compared to standard HC devices. It serves as a direct functional replacement for older 74LS138 designs where voltage compatibility and speed are critical factors in the circuit architecture.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHC138PWR is available as an alternative reel-packaged version from the same manufacturer.