SN74LVC138AMPWTEP

Overview

The SN74LVC138AMPWTEP is a 3-line to 8-line decoder and demultiplexer from Texas Instruments' LVC logic family. It operates within a supply voltage range of 1.65 V to 3.6 V, ensuring compatibility with low-voltage digital systems. The device features a propagation delay of 6.7 ns and functions reliably across an industrial temperature range from -40°C to +85°C. Packaged in a 16-pin TSSOP format, it provides eight active-low outputs controlled by three binary inputs and three enable pins.

Feature Summary

• Provides decoding and demultiplexing functionality for three binary inputs to eight active-low outputs
• Operates efficiently within a wide low-voltage power supply range
• Includes multiple enable inputs to manage data flow and prevent unintended signal activation

Applications

• Address decoding in embedded microcontroller systems
• Data routing in communication interface circuits
• Memory chip selection in storage architectures

Procurement Notes

Verify the specific suffix 'EP' indicates enhanced product specifications or packaging variations compared to standard variants. Confirm the TSSOP-16 package dimensions match your PCB footprint requirements. Ensure the operating temperature range aligns with your environmental constraints. Cross-reference the datasheet revision date to confirm current electrical characteristics before finalizing component selection.

Selection Notes

Select this component when low-power consumption and high-speed switching are required in compact designs. The LVC series offers improved performance over older logic families while maintaining pin compatibility. Consider the TSSOP package for surface-mount applications requiring higher pin density. Verify that the input voltage levels are compatible with your system's logic thresholds.

Part Context

This part belongs to the SN74LVC138A family of decoders and demultiplexers manufactured by Texas Instruments. The LVC series is designed for low-voltage applications, offering faster switching speeds and lower power dissipation compared to traditional CMOS logic. The 'AMPWTEP' designation specifies the automotive-grade or enhanced performance variant in a TSSOP package, distinguishing it from standard commercial versions.

Replacement Considerations

Compatible substitutes include the SN74LVC138APWR and SN74LVC138ADRE4. Verify that alternative packages such as SOIC or PW (TSSOP) meet your mechanical constraints. Ensure the substitute maintains the same LVC logic family characteristics for voltage and speed compatibility.