74HC85N,652 Magnitude Comparator - Equivalent & Substitute Parts

Part Overview

The 74HC85N,652 is a 4-bit magnitude comparator manufactured by NXP USA Inc., designed to compare two 4-bit binary words and provide three active-high outputs indicating the relationship between inputs (A<B, A=B, A>B). This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

74HC85N,652

NXP USA Inc.In Stock: 122374HC85N,652 Datasheet

Current PartRFQ

CD74HC85E

Texas InstrumentsIn Stock: 1326CD74HC85E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC85N,652 is determined by the following critical parameters:

• Functional Equivalence: 4-bit magnitude comparator with identical output functions (A<B, A=B, A>B)
• Electrical Compatibility: Supply voltage range 2V to 6V, output current ratings 5.2mA, propagation delay 33ns @ 6V
• Package Compatibility: 16-DIP through-hole package (0.300", 7.62mm pitch)
• Logic Series: 74HC family devices
• Compliance Requirements: ROHS3 compliance and EAR99 classification

The CD74HC85E from Texas Instruments meets all substitution criteria as an active product within the same logic family, maintaining identical electrical specifications and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC85E from Texas Instruments is the direct functional equivalent for the obsolete 74HC85N,652. Selection is based on the following engineering criteria:

Compliance and Availability: The CD74HC85E maintains ROHS3 compliance and EAR99 classification identical to the original part. As an active product with confirmed inventory availability, it provides long-term procurement stability compared to the obsolete NXP device.

Electrical Equivalence: All critical electrical parameters are identical, including supply voltage range, output current ratings, and propagation delay specifications. The extended operating temperature range (-55°C to 125°C) of the CD74HC85E provides additional margin for applications requiring lower temperature operation.

Package and Mounting: Both devices utilize the same 16-DIP through-hole package with 0.300" (7.62mm) pitch, enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC85E be used as a direct replacement for the 74HC85N,652?

A: Yes. The CD74HC85E is electrically and mechanically equivalent. All functional parameters, electrical specifications, and package dimensions are identical, enabling direct substitution in existing designs.

Q: Are there any differences in operating temperature ranges?

A: The CD74HC85E operates from -55°C to 125°C, compared to the 74HC85N,652 range of -40°C to 125°C. This represents an extended lower temperature capability in the substitute part, which is advantageous for applications requiring operation at lower temperatures.

Q: Will the CD74HC85E work with the same PCB footprint?

A: Yes. Both parts use the 16-DIP package with 0.300" (7.62mm) pitch. No PCB layout modifications are required for substitution.

Q: What is the difference between the packaging designations (16-DIP vs. 16-PDIP)?

A: Both designations refer to the same 16-pin dual-in-line package format. The "P" in PDIP indicates plastic material, which is standard for modern through-hole components. The physical dimensions and pin spacing are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the 74HC85N,652 and CD74HC85E are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the base product number for these parts?

A: Both devices share the base product number 74HC85, indicating they are part of the same logic family and functional series.