CD74HC139MT

Signal Switches, Multiplexers, Decoders Overview

The CD74HC139MT is a high-speed CMOS logic device containing two independent binary to one-of-four decoders or 1-to-4 line demultiplexers. It operates within a supply voltage range of 2V to 6V and supports an extended operating temperature range from -55°C to +125°C. The component utilizes a 16-pin Small Outline Integrated Circuit (SOIC) package with surface-mount technology. Each decoder features active-low mutually exclusive outputs and a single active-low enable input that can function as a data input for demultiplexer applications.

Signal Switches, Multiplexers, Decoders Feature Summary

• Contains two independent 2-to-4 line decoder/demultiplexer circuits
• Features active-low mutually exclusive outputs
• Supports wide operating temperature range from -55°C to +125°C
• Functions as chip select when devices are cascaded

Signal Switches, Multiplexers, Decoders Applications

• Binary to one-of-four decoding
• One-to-four line demultiplexing
• Memory decoding systems
• Data routing and code conversion

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'MT' corresponds to the SOIC package variant during procurement. Confirm the manufacturer's current status indicates the device is recommended for new designs. Ensure compliance with RoHS requirements and check for any applicable environmental certifications before finalizing purchase orders.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring dual independent decoding functions in a compact surface-mount footprint. The HC logic family provides high noise immunity and balanced propagation delays suitable for general-purpose digital logic. Verify that the 2V to 6V supply voltage range aligns with the system power architecture.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the Texas Instruments CD74HC139 series, which includes variants such as CD74HC139E and CD74HC139M. The 'MT' suffix specifically denotes the tape and reel packaging format for the SOIC-16 package. The device is functionally equivalent to the CD4556B and maintains pin compatibility with it.

Signal Switches, Multiplexers, Decoders Replacement Considerations

CD74HC139M

Signal Switches, Multiplexers, Decoders FAQ

What is the relationship between the enable input and demultiplexer operation?

For demultiplexer operation, the active-low enable input serves as the data input while the select inputs determine the output path.

How does the device handle cascading?

The enable input functions as a chip select when these devices are cascaded, allowing for expansion of decoding capabilities.