SN74LVC138APWG4

Overview

The SN74LVC138APWG4 is a 3-to-8 line decoder and demultiplexer from Texas Instruments, belonging to the LVC logic family. It features three binary address inputs and eight active-low outputs. The device operates within a supply voltage range of 2 V to 3.6 V and includes two active-low enable inputs and one active-high enable input for power management. It is housed in a TSSOP-16 surface-mount package with a propagation delay of 6.7 ns. The component supports an operating temperature range from -55 °C to +125 °C.

Feature Summary

• Provides decoding and demultiplexing functions via three binary address lines controlling eight distinct output channels.
• Incorporates multiple enable inputs to manage chip activation, allowing efficient system-level power control.
• Utilizes low-voltage CMOS technology compatible with standard digital logic interfaces.

Applications

• Address decoding in embedded systems
• Demultiplexing data streams in communication circuits
• Memory addressing in industrial control units

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free packaging compliant with RoHS standards. Confirm the TSSOP-16 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Cross-reference the datasheet for exact pinout configurations before integration.

Selection Notes

Select this component when low voltage operation between 2 V and 3.6 V is required. Choose this part for applications needing high-speed decoding with a 6.7 ns propagation delay. Consider this device if multiple enable inputs are necessary for complex system control. Verify compatibility with existing logic levels in the target circuit design.

Part Context

This part belongs to the SN74LVC138A series of decoders and demultiplexers. The 'G4' suffix typically denotes a lead-free version of the standard SN74LVC138APWR or SN74LVC138APW components. It shares functional similarities with other LVC family devices but offers specific voltage and speed characteristics suited for modern low-power electronics.

Replacement Considerations

SN74LVC138APWR

FAQ

What is the function of the enable inputs?

The device has two active-low enable inputs (G1, G2A) and one active-high enable input (G2B). All enables must be in their active state for the addressed output to activate.

Are the outputs active-high or active-low?

The SN74LVC138APWG4 features eight active-low outputs. Only the selected output goes low while others remain high.