SN74HC139PWT

Overview

The SN74HC139PWT is a dual 2-line to 4-line decoder/demultiplexer in a 16-pin TSSOP package. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature from -40°C to 85°C. The device features active-low outputs, fully buffered inputs, and two enable inputs for cascading or data reception. Typical propagation delay is 10 ns at 5 V, with output drive capabilities of ±4 mA.

Feature Summary

• Designed for high-speed memory decoders and data-transmission systems
• Incorporates two enable inputs to simplify cascading and data reception
• Features fully buffered inputs representing only one normalized load

Applications

• High-performance memory decoding
• Data-routing applications
• Demultiplexing circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum to confirm lead finish, moisture sensitivity level, and environmental compliance status. Ensure the component matches the required RoHS designation and packaging format specified in the latest datasheet revision.

Selection Notes

Select this component when a dual 2-to-4 decoder is required in a surface-mount TSSOP package. It is suitable for designs needing wide voltage operation between 2 V and 6 V. Consider the typical 10 ns propagation delay and low power consumption characteristics for system timing and efficiency requirements.

Part Context

This part belongs to the SNx4HC139 family of logic ICs manufactured by Texas Instruments. It is functionally compatible with other variants such as SN74HC139D (SOIC) and SN74HC139N (PDIP), differing primarily in package type and thermal characteristics while maintaining identical logical functionality.

Replacement Considerations

Direct pin-compatible alternatives include SN74HC139D and SN74HC139N. Verify that the substitute package meets the mechanical footprint and thermal resistance requirements of the design.