SN74HC139APW

Overview

The SN74HC139APW is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments HC logic family. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to +85°C. The device features a propagation delay of 44 ns and utilizes a 16-pin TSSOP surface-mount package. It contains two independent decoding circuits, each with two address inputs and four active-low outputs.

Feature Summary

• Dual independent 2-to-4 line decoding functionality
• Active-low output states for precise signal selection
• Wide power supply compatibility across industrial ranges

Applications

• Address decoding in embedded systems
• Chip select generation for peripheral devices
• Data routing in multiplexed architectures

Procurement Notes

Verify the specific suffix 'APW' against the official datasheet to confirm the exact package variant and temperature grade. Ensure the ordering part number matches the required tape-and-reel or cut-tape specifications for your assembly process. Cross-reference the manufacturer's latest documentation for any pinout or electrical characteristic updates.

Selection Notes

Select this component when dual independent decoding channels are required within a single package. The HC series offers standard CMOS performance suitable for general-purpose logic applications. Consider the TSSOP package dimensions for PCB layout constraints and verify that the 2V to 6V supply range aligns with the system's power architecture.

Part Context

This device belongs to the SN74HC139 family of decoders. It shares functional similarities with other 74HC series logic but provides dedicated dual-decoder capabilities. The HC technology ensures low power consumption while maintaining high-speed operation comparable to older LS series devices in many applications.