CD74HC139EX

Signal Switches, Multiplexers, Decoders Overview

The CD74HC139EX is a high-speed CMOS logic component manufactured by Harris Corporation, classified under the HC/UH series. It functions as a decoder/driver featuring inverted outputs and is housed in a PDIP-16 package. The device operates within a temperature range of -55°C to 125°C and includes two functional units. Key electrical specifications include a maximum output low current (Iol) of 0.004 A and a load capacitance (CL) of 50 pF. The unit utilizes plastic/epoxy material for its encapsulation and is identified by JESD-30 code R-PDIP-T16.

Signal Switches, Multiplexers, Decoders Feature Summary

• Features inverted outputs suitable for specific decoding applications
• Includes three enable inputs to facilitate circuit cascading
• Operates with standard input regulation characteristics

Signal Switches, Multiplexers, Decoders Applications

• Memory address decoding systems
• Data routing circuits
• I/O port selection interfaces

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the manufacturer origin, as Harris Corporation's semiconductor assets were acquired by Renesas Electronics. Confirm that the specific part number corresponds to the intended vintage or production batch. Ensure compliance with RoHS directives if required, as this specific variant is noted as non-compliant in available records. Validate the DIP-16 package dimensions against current design constraints.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a dual 2-to-4 line decoder with inverted outputs is required. It is appropriate for designs needing wide operating temperatures up to 125°C. Consider the HC/UH series speed and power characteristics relative to other logic families. Verify pin compatibility with existing PCB footprints before finalizing the selection.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the 74HC139 family of decoders. It shares functional similarities with other 2-to-4 line decoders but is distinguished by its inverted output polarity. The HC technology offers low power consumption comparable to standard CMOS while maintaining speeds similar to low-power Schottky TTL. It serves as a digital logic interface for selecting one of four outputs based on binary inputs.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.