CD74HC85PW Equivalent & Substitute Parts

Part Overview

The CD74HC85PW is a 4-bit magnitude comparator logic IC manufactured by Texas Instruments in 16-TSSOP surface mount packaging. This component performs parallel comparison of two 4-bit binary words and outputs three active-high signals indicating whether input A is less than, equal to, or greater than input B. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts maintain identical functional specifications and electrical characteristics while offering improved availability or alternative packaging options.

Substiute Parts

CD74HC85PW

Texas InstrumentsIn Stock: 1585CD74HC85PW Datasheet

Current PartRFQ

CD74HC85PWR

Texas InstrumentsIn Stock: 4290CD74HC85PWR Datasheet

DirectRFQ

74HC85PW,118

Nexperia USA Inc.In Stock: 727074HC85PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC85PW is determined by strict equivalence across the following critical parameters:

• Functional Type: 4-bit magnitude comparator with active-high outputs (A<B, A=B, A>B)
• Electrical Specifications: Voltage supply range 2V–6V, output current 5.2mA, propagation delay 33ns @ 6V/50pF, quiescent current 8 µA
• Package Compatibility: 16-TSSOP surface mount package (0.173", 4.40mm width)
• Compliance: ROHS3 compliant, MSL 1 rating
• Base Product Series: 74HC85 logic family

All identified substitutes maintain these parameters without deviation. Packaging format (tube versus tape & reel) and manufacturer differences do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

CD74HC85PWR (Texas Instruments) is the primary substitute for CD74HC85PW. Both parts are manufactured by Texas Instruments with identical electrical and functional specifications. The CD74HC85PWR maintains the full operating temperature range (-55°C to 125°C) and is currently in active production status, ensuring long-term availability. The only difference is packaging format: CD74HC85PWR is supplied in tape & reel format rather than tube, which is standard for high-volume manufacturing environments.

74HC85PW,118 (Nexperia USA Inc.) is a secondary substitute manufactured by Nexperia, a qualified alternative source for 74HC logic families. This part is functionally equivalent and maintains all critical electrical parameters. The operating temperature range is -40°C to 125°C, which is narrower at the lower end compared to the original part. This part is suitable for applications where the minimum operating temperature requirement does not exceed -40°C. The Nexperia part is also in active production and available in tape & reel packaging.

Both substitutes carry ROHS3 compliance and MSL 1 ratings, meeting the same environmental and handling standards as the original part.

Frequently Asked Questions (FAQ)

Q: Can CD74HC85PWR be used as a direct replacement for CD74HC85PW?

A: Yes. CD74HC85PWR is a direct functional equivalent. Both parts are manufactured by Texas Instruments with identical electrical specifications, output characteristics, and package dimensions. The difference is packaging format: CD74HC85PWR uses tape & reel instead of tube. No circuit modifications are required.

Q: What is the difference between the Texas Instruments and Nexperia versions?

A: Both manufacturers produce 74HC85 comparators that meet the same functional and electrical specifications. The primary difference is the operating temperature range: Texas Instruments parts operate from -55°C to 125°C, while Nexperia parts operate from -40°C to 125°C. Select based on your application's minimum temperature requirement.

Q: Does packaging format (tube vs. tape & reel) affect circuit performance?

A: No. Packaging format affects only handling, storage, and assembly processes. Electrical performance and functional characteristics are identical regardless of whether the part is supplied in tube or tape & reel format.

Q: Are all substitutes ROHS3 compliant?

A: Yes. CD74HC85PWR and 74HC85PW,118 are both ROHS3 compliant with MSL 1 ratings, matching the compliance profile of the original CD74HC85PW.

Q: Can I use the Nexperia part in applications requiring -55°C operation?

A: No. The Nexperia 74HC85PW,118 is rated only to -40°C minimum. For applications requiring operation below -40°C, use CD74HC85PWR or the original CD74HC85PW if available from inventory.

Q: What is the propagation delay specification, and does it differ between substitutes?

A: All three parts have identical propagation delay of 33ns maximum at 6V supply voltage with 50pF load. This timing specification is consistent across all substitutes and does not vary by manufacturer.