74HC85D,652 Magnitude Comparator 4-Bit Logic IC

Part Overview

The 74HC85D,652 is a 4-bit magnitude comparator logic IC manufactured by Nexperia USA Inc. in 16-SOIC surface mount packaging. This component performs binary comparison operations, generating active-high outputs for A<B, A=B, and A>B conditions. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

74HC85D,652

Nexperia USA Inc.In Stock: 87574HC85D,652 Datasheet

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CD74HC85M

Texas InstrumentsIn Stock: 1247CD74HC85M Datasheet

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CD74HC85M96

Texas InstrumentsIn Stock: 2062CD74HC85M96 Datasheet

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CD74HC85MT

Texas InstrumentsIn Stock: 1316CD74HC85MT Datasheet

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CD74HC85NSR

Texas InstrumentsIn Stock: 3193CD74HC85NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC85D,652 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Base product number: 74HC85
• Functional type: 4-bit magnitude comparator
• Output configuration: Active high (A<B, A=B, A>B)
• Supply voltage range: 2V to 6V
• Output current capability: 5.2mA / 5.2mA
• Propagation delay: 33ns @ 6V, 50pF
• Quiescent current: 8 µA
• Package type: 16-SOIC or 16-SO surface mount
• RoHS compliance: ROHS3 Compliant

Allowable Variations:

• Operating temperature range may extend beyond the original specification
• Packaging format (tube, cut tape, tape & reel) does not affect electrical compatibility
• Product status (active, discontinued, obsolete) does not affect functional equivalence

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD74HC85M96

The CD74HC85M96 from Texas Instruments is the preferred substitute. It maintains full electrical equivalence with the 74HC85D,652 across all critical parameters and carries active product status, ensuring long-term availability and supply chain stability. This part is supplied in cut tape and digi-reel packaging formats suitable for production environments.

Secondary Recommendations: CD74HC85M and CD74HC85MT

Both CD74HC85M and CD74HC85MT provide complete electrical compatibility with the original part. CD74HC85M is available in tube packaging, while CD74HC85MT is supplied in cut tape format. Both are listed as obsolete or discontinued at DiGi Electronics, which may impact future procurement availability.

Alternative Option: CD74HC85NSR

The CD74HC85NSR is functionally equivalent and currently active. This part features a wider 16-SO package body (0.209" vs. 0.154" width) and is supplied in tape & reel format. PCB layout modifications may be required due to the increased package width, but electrical performance is identical.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements. All parts operate within the -40°C to 125°C temperature range specified for the original design, with substitute parts offering extended low-temperature operation to -55°C.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74HC85D,652 with CD74HC85M96 without circuit modifications?

A: Yes. The CD74HC85M96 is electrically and mechanically equivalent. Both use identical 16-SOIC packaging with 0.154" body width, identical pin configuration, and matching electrical specifications. No circuit modifications are required.

Q: What is the difference between CD74HC85M, CD74HC85M96, and CD74HC85MT?

A: These three parts are electrically identical. The differences are in packaging format and product status. CD74HC85M is supplied in tubes, CD74HC85M96 in cut tape and digi-reel, and CD74HC85MT in cut tape. CD74HC85M96 is the only part with active status.

Q: Why does CD74HC85NSR have a different package width?

A: The CD74HC85NSR uses a 16-SO package with 0.209" body width compared to the standard 0.154" width of other substitutes. While functionally identical, this wider package may require PCB layout adjustments if pin spacing differs. Verify footprint compatibility before design implementation.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original 74HC85D,652.

Q: Which substitute part should I choose for new designs?

A: CD74HC85M96 is recommended for new designs due to its active product status, ensuring continued availability and supply chain support. This part is supplied in standard production formats (cut tape and digi-reel).

Q: Can I use these substitutes in high-temperature applications?

A: All substitute parts operate to 125°C maximum, matching the original specification. The extended low-temperature range to -55°C provides additional margin for cold environment applications.