TC74VHC139FTELM

Overview

The TC74VHC139FTELM is a dual 2-to-4 line decoder/demultiplexer fabricated with silicon gate C2MOS technology. It operates within a supply voltage range of 2.0 V to 5.5 V and supports an operating temperature from -40°C to 85°C. The device features active low enable inputs, balanced propagation delays, and high noise immunity. It provides power-down protection on all inputs and ensures input pin compatibility with voltages up to 5.5 V regardless of the supply voltage.

Feature Summary

• Dual independent 2-to-4 line decoding or demultiplexing functionality
• Active low enable inputs for gating control
• Power-down protection on all inputs
• High noise immunity with defined voltage thresholds

Applications

• Gating applications using active low enable inputs
• Demultiplexing data streams
• Interfacing between 5 V and 3 V systems
• Battery backup system interfaces

Procurement Notes

Verify the specific package suffix 'ELM' against official Toshiba documentation, as datasheets reference FT, FN, F, and FK variants. Confirm RoHS compliance status directly with the manufacturer. Ensure design accounts for absolute maximum ratings to prevent performance deterioration. Review the Toshiba Semiconductor Reliability Handbook for derating concepts before implementation.

Selection Notes

Select this component when dual independent decoders are required in a single package. It serves as a functional replacement for 74ALS139 while offering CMOS low power dissipation. Consider the wide operating voltage range if interfacing mixed logic levels. Verify that the 2-to-4 line configuration matches the address decoding requirements of the target circuit design.

Part Context

This part belongs to the TC74VHC series of advanced high-speed CMOS digital integrated circuits. It utilizes silicon gate C2MOS technology to achieve speeds comparable to Bipolar Schottky TTL. The device maintains low power consumption typical of CMOS logic families. It is designed for general electronics applications including computers and office equipment.

Replacement Considerations

The datasheet explicitly states pin and function compatibility with the 74ALS139. No other specific substitute part numbers are documented in the provided source material.