CD74HCT139E

Overview

The CD74HCT139E is a high-speed CMOS logic device manufactured by Texas Instruments, belonging to the 74HCT series. It functions as a dual 2-to-4 line decoder/demultiplexer housed in a 16-pin PDIP package. The component operates on a single power supply with a voltage range of 4.5V to 5.5V. It features two independent decoding circuits, each providing four active-low outputs driven by two binary address inputs and an enable input. The device supports through-hole mounting and is rated for operation within a temperature range of -55°C to 125°C.

Feature Summary

• Dual independent 2-to-4 line decoding functionality
• High-speed CMOS technology compatible with TTL logic levels
• Active-low output configuration for precise signal routing

Applications

• Memory address decoding in embedded systems
• Data routing and distribution networks
• Control signal generation for peripheral devices

Procurement Notes

Verify the specific suffix 'E' indicates the standard PDIP-16 package variant when sourcing. Confirm RoHS compliance status (EG4) if environmental regulations require lead-free specifications. Ensure the supplier provides official datasheets matching the 74HCT series electrical characteristics to avoid confusion with HC or AC variants.

Selection Notes

Select this component when interface compatibility with 5V TTL logic is required alongside CMOS low power consumption. The HCT series ensures noise margins suitable for industrial environments. Consider the PDIP-16 form factor for prototyping or applications requiring through-hole assembly rather than surface mount solutions.

Part Context

This part belongs to the widely adopted 74HCT logic family, designed to bridge the gap between standard CMOS and Low-Power Schottky TTL performance. The CD74HCT139 specifically addresses needs for multiple simultaneous decoding paths within a compact integrated circuit footprint.

Replacement Considerations

CD74HCT139EG4: Lead-free version of the same functional device.