CD74HC85MT

Comparators Overview

The CD74HC85MT is a high-speed CMOS 4-bit magnitude comparator manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and features active-high outputs for A<B, A=B, and A>B conditions. The device exhibits a maximum propagation delay of 33ns at 6V with a 50pF load and draws a static current of 8µA. It supports cascading via expansion inputs to compare larger bit widths. Packaged in a 16-SOIC surface-mount format, it functions across an industrial temperature range of -55°C to +125°C.

Comparators Feature Summary

• Provides parallel magnitude comparison for 4-bit binary numbers
• Includes cascading expansion inputs for multi-bit system scaling
• Delivers active-high logic outputs indicating less than, equal, or greater relationships

Comparators Applications

• Digital arithmetic logic units requiring magnitude evaluation
• Cascaded systems for extended bit-width comparisons
• Industrial control circuits operating in wide temperature environments

Comparators Procurement Notes

Verify the component status as obsolete through official Texas Instruments channels before procurement planning. Confirm that the specific SOIC package variant matches design requirements. Check for valid replacement part numbers such as the CD74HCT85MT if HC series availability is restricted. Ensure compliance with RoHS3 specifications during sourcing.

Comparators Selection Notes

Select this component when high-speed 4-bit comparison is required within standard CMOS logic families. Consider the 2V to 6V supply range compatibility with existing system rails. Evaluate the 33ns propagation delay against timing constraints. Verify that the 16-SOIC footprint aligns with PCB layout capabilities and thermal management needs.

Comparators Part Context

This device belongs to the Texas Instruments 74HC logic family, characterized by high-speed CMOS technology. It serves as a fundamental building block for digital comparison tasks. The part integrates standard magnitude comparison functionality into a compact surface-mount package suitable for automated assembly processes.

Comparators Replacement Considerations

Public confirmed substitute part numbers include CD74HCT85MT. Verify pinout and electrical parameter compatibility before substitution.