74HCT85DB,118

Comparators Overview

The Nexperia 74HCT85DB,118 is a 4-bit magnitude comparator housed in a 16-SSOP package. It compares two 4-bit binary or BCD codes to determine relative magnitude, providing active-high outputs for A>B, A=B, and A<B conditions. The device operates within a supply voltage range of 4.5 V to 5.5 V and draws a maximum supply current of 8 µA. It supports an extended operating temperature range from -40 °C to +125 °C. Inputs include clamp diodes to facilitate interfacing with voltages exceeding VCC using current-limiting resistors.

Comparators Feature Summary

• Performs 4-bit magnitude comparison between two binary or monotonic codes
• Provides three distinct active-high output signals indicating greater than, equal to, or less than relationships
• Features input clamp diodes for robust interfacing with higher voltage levels via current-limiting resistors
• Supports cascading expansion to compare words longer than 4 bits

Comparators Applications

• Process controllers requiring data magnitude verification
• Servo-motor control systems for position feedback comparison
• Digital logic circuits needing binary code validation

Comparators Procurement Notes

Verify component status carefully as this part may be obsolete or end-of-life. Confirm availability through authorized distributors only. Check datasheet revisions for any pinout or electrical specification changes. Ensure the SSOP-16 package matches your PCB footprint requirements. Validate RoHS compliance documentation before integration into production.

Comparators Selection Notes

Select this component when TTL-compatible inputs are required for 4-bit comparisons. Choose over HC variants if noise immunity at lower voltages is not critical but TTL levels are necessary. Verify that the 16-SSOP package fits the assembly constraints. Consider cascading capabilities if larger bit-width comparisons are needed in the design.

Comparators Part Context

This part belongs to the 74HCT series of high-speed CMOS logic devices. It functions as a digital comparator within the broader family of logic ICs produced by Nexperia. The HCT designation indicates compatibility with TTL input levels while maintaining CMOS output characteristics. It is designed for general-purpose digital logic applications requiring reliable magnitude comparison.

Comparators Replacement Considerations

Check for direct substitutes like the 74HC85D if TTL input compatibility is not strictly required. Verify pinout and package dimensions match exactly. Review electrical specifications to ensure performance meets system requirements. Consult manufacturer obsolescence notices for long-term supply chain risks.