SN74LV138APWG4

Overview

The SN74LV138APWG4 is a low-voltage CMOS 3-to-8 line decoder and demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 5.5 V and features three binary address inputs and eight active-low outputs. The device includes two active-low enable inputs and one active-high enable input for expanded functionality. It is housed in a TSSOP-16 surface-mount package and supports operation across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides decoding and demultiplexing functions with three binary address lines controlling eight active-low outputs
• Incorporates dual active-low and single active-high enable inputs to facilitate system expansion
• Operates on a wide supply voltage range from 2 V to 5.5 V using low-voltage CMOS technology

Applications

• Address decoding for memory and I/O port selection in embedded systems
• Demultiplexing data streams in digital communication interfaces
• Control logic for peripheral device activation in consumer electronics

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the TSSOP-16 package variant matches the required footprint for PCB layout. Ensure the operating temperature range meets the environmental specifications of the target application. Cross-reference the datasheet revision to confirm electrical characteristics align with current design requirements.

Selection Notes

Select this component when a low-voltage 3-to-8 decoder is required with flexible enable control. The LV series offers compatibility with both 3.3 V and 5 V logic levels, making it suitable for mixed-voltage designs. Consider the TSSOP-16 package for space-constrained applications requiring surface-mount assembly. Verify that the active-low output polarity aligns with the downstream circuit requirements.

Part Context

This part belongs to the SN74LV138A family of low-voltage decoders and demultiplexers. It serves as a standard logic solution for address decoding tasks in modern electronic systems. The device complements other logic families by providing reliable performance at reduced supply voltages while maintaining compatibility with traditional logic levels.

Replacement Considerations

Check for direct pin-compatible alternatives within the same logic family or broader compatible series. Verify that any substitute maintains the same enable logic configuration and output polarity. Ensure the replacement package type matches the existing board layout constraints.