SN74LV138ATDR

Overview

The SN74LV138ATDR is a Texas Instruments automotive-grade decoder/demultiplexer from the LV series. It features three address inputs and eight active-low outputs, operating within a supply voltage range of 2 V to 5.5 V. The device utilizes a TSSOP-16 package and supports surface-mount installation. It functions across an extended temperature range from -40°C to +125°C. Key electrical characteristics include a propagation delay of 15 ns and output drive capabilities of 12 mA for both high and low states.

Feature Summary

• Provides decoding and demultiplexing functionality with three address lines controlling eight distinct outputs
• Features two active-low and one active-high enable inputs for flexible system control
• Supports wide supply voltage operation ranging from 2 V to 5.5 V
• Designed for automotive applications with qualified reliability standards

Applications

• Automotive electronic systems requiring address decoding
• Data routing and signal distribution in vehicle networks
• Memory addressing circuits in automotive infotainment units
• General-purpose digital logic decoding in harsh environments

Procurement Notes

Verify the specific suffix 'A' and 'TDR' against the manufacturer's official documentation to confirm the exact package type, tape-and-reel specifications, and automotive qualification status. Ensure compatibility with your PCB footprint and reflow soldering profile requirements before finalizing procurement orders.

Selection Notes

Select this component when a wide supply voltage range including 5 V is required alongside automotive reliability standards. Compare propagation delays and output drive currents against other LV series variants if timing constraints are critical. Verify that the TSSOP-16 package dimensions fit your board layout constraints.

Part Context

This part belongs to the SN74LV138A family of 3-line to 8-line decoders and demultiplexers. It is designed for low-voltage applications but maintains compatibility with standard logic levels. The automotive grade designation indicates adherence to specific quality and reliability standards for vehicle electronics.

Replacement Considerations

SN74LV138APWRG4: Similar LV series decoder in TSSOP-16 package with comparable electrical characteristics.

FAQ

What is the logic family of the SN74LV138ATDR?

It belongs to the LV (Low-Voltage CMOS) logic family.

How many enable inputs does the device have?

It has three enable inputs: two active-low (G1, G2A, G2B) and one active-high.