CD74HCT258E

Overview

The CD74HCT258E is a quad 2-input multiplexer/demultiplexer from the HCT logic family, manufactured by Harris Corporation. It features four independent data selectors with inverted outputs and three-state control. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum output current of 6mA for both high and low states. It is housed in a 16-pin Dual In-Line Package (DIP) suitable for through-hole mounting. The component functions reliably across an extended temperature range of -55°C to 125°C.

Feature Summary

• Integrates four independent 2-to-1 multiplexers within a single package
• Provides three-state output capability for bus-oriented applications
• Features inverted logic outputs for signal selection
• Compatible with standard TTL logic levels via HCT technology

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based interfaces
• Address decoding circuits
• Multiplexing sensor inputs for processing

Procurement Notes

Verify RoHS compliance status as documentation indicates non-compliance. Confirm manufacturer origin between Harris Corporation and Texas Instruments/Rochester Electronics due to corporate acquisitions. Ensure the DIP-16 package matches your PCB footprint requirements. Check for lead-free specifications if environmental regulations apply to your assembly process.

Selection Notes

Select this component when a compact solution for multiple 2:1 signal paths is required. The HCT series ensures compatibility with 5V CMOS and TTL logic families. Consider the three-state feature if bus isolation is necessary. Verify that the operating temperature range meets your environmental conditions. Compare pinout compatibility with other 74HCT258 variants if substituting existing designs.

Part Context

This part belongs to the 74HCT258 family of quad multiplexers. It shares functional similarities with HC and AC series counterparts but offers specific voltage and speed characteristics defined by the HCT standard. The device serves as a fundamental building block for digital data path management in legacy and industrial electronic systems.

Replacement Considerations

CD74HC258E

FAQ

What is the logic polarity of the CD74HCT258E outputs?

The outputs are inverted, meaning the selected input signal is complemented at the output pin.

Does the CD74HCT258E support bidirectional data flow?

Yes, it can function as both a multiplexer and a demultiplexer depending on the circuit configuration.