SN74LV138ADR

Overview

The SN74LV138ADR is a 3-to-8 line decoder and demultiplexer from Texas Instruments, belonging to the LV logic series. It features three address inputs and eight active-low outputs. The device operates within a supply voltage range of 2 V to 5.5 V. It utilizes a 16-SOIC surface-mount package with a maximum propagation delay of 13 ns. The component supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Provides decoding and demultiplexing functions via three binary address lines controlling eight distinct output channels.
• Incorporates two active-low enable inputs and one active-high enable input for precise control over device activation states.

Applications

• Address decoding in embedded systems
• Demultiplexing data streams in digital circuits
• Memory chip select generation

Procurement Notes

Verify the specific suffix 'A' against official manufacturer documentation to confirm it denotes the standard commercial grade variant rather than an automotive or extended specification version. Ensure the SOIC-16 package dimensions match your PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a wide supply voltage range including 5 V operation is required alongside low power consumption characteristics. The LV series offers compatibility with both 3.3 V and 5 V logic levels, making it suitable for mixed-voltage system designs requiring robust signal integrity.

Part Context

This part belongs to the SN74LV138A family of decoders and demultiplexers manufactured by Texas Instruments. The family provides high-speed switching capabilities with low static power dissipation. The 'ADR' suffix indicates the specific tape-and-reel packaging format and the SOIC-16 physical housing used for surface mount assembly.

Replacement Considerations

Compatible substitutes include the SN74LVC138ADBR and SN74LV138APWR. Verify pinout compatibility and electrical specifications such as propagation delay and supply voltage limits before substituting these alternative part numbers.