CD74HC85MT Equivalent & Substitute Parts

Part Overview

The CD74HC85MT is a 4-bit magnitude comparator manufactured by Texas Instruments, designed for logic-level comparison operations with active high outputs. This device performs A<B, A=B, and A>B comparisons across 4-bit data inputs. The CD74HC85MT is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

CD74HC85MT

Texas InstrumentsIn Stock: 1316CD74HC85MT Datasheet

Current PartRFQ

CD74HC85M96

Texas InstrumentsIn Stock: 2062CD74HC85M96 Datasheet

DirectRFQ

74HC85D,653

Nexperia USA Inc.In Stock: 450774HC85D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC85MT is determined by strict equivalence across the following critical parameters:

• Functional Type: 4-bit magnitude comparator with identical output functions (A<B, A=B, A>B)
• Output Configuration: Active high output logic
• Electrical Specifications: Supply voltage range (2V ~ 6V), output current (5.2mA), propagation delay (33ns @ 6V, 50pF), and quiescent current (8 µA)
• Package Compatibility: 16-SOIC surface mount package with 0.154" width (3.90mm)
• Temperature Range: Operating temperature capability from -55°C to 125°C or equivalent
• Compliance: ROHS3 compliance and REACH unaffected status

Substitute parts must match all electrical parameters and maintain the 16-SOIC package form factor to ensure direct circuit board compatibility without redesign.

Parameter Comparison

Engineering Selection Recommendations

CD74HC85M96 (Texas Instruments): This part maintains identical electrical specifications and operating temperature range (-55°C ~ 125°C) to the CD74HC85MT. Both are manufactured by Texas Instruments and share the same base product number (74HC85). The CD74HC85M96 is currently in active production status with 1968 units in stock, providing immediate availability for replacement applications.

74HC85D,653 (Nexperia USA Inc.): This alternative offers equivalent electrical performance and maintains ROHS3 and REACH compliance. The operating temperature range is -40°C ~ 125°C, which represents a narrower lower temperature specification compared to the CD74HC85MT (-55°C ~ 125°C). Selection of this part is appropriate for applications where the minimum operating temperature requirement does not extend below -40°C. The 74HC85D,653 is actively produced with 4478 units in stock.

Both substitute parts are functionally interchangeable with the CD74HC85MT at the circuit level, provided application temperature requirements are satisfied.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC85M96 directly replace the CD74HC85MT without circuit modification?

A: Yes. The CD74HC85M96 maintains identical electrical specifications, output functions, supply voltage range, propagation delay, and 16-SOIC package configuration. Direct substitution is possible without circuit redesign.

Q: What is the key difference between the CD74HC85M96 and 74HC85D,653?

A: Both parts are electrically equivalent 4-bit magnitude comparators with identical output specifications and propagation delay. The primary difference is the operating temperature range: CD74HC85M96 operates from -55°C to 125°C, while 74HC85D,653 operates from -40°C to 125°C. Selection depends on application temperature requirements.

Q: Are there packaging differences between these substitute parts?

A: All three parts (CD74HC85MT, CD74HC85M96, and 74HC85D,653) use the 16-SOIC surface mount package with 0.154" width (3.90mm). No PCB layout modifications are required for substitution.

Q: Do the substitute parts meet the same compliance standards as the CD74HC85MT?

A: Yes. Both CD74HC85M96 and 74HC85D,653 are ROHS3 compliant and REACH unaffected, matching the compliance profile of the CD74HC85MT.

Q: Which substitute part should be selected for new production?

A: Selection between CD74HC85M96 and 74HC85D,653 depends on application temperature requirements. For applications requiring operation at temperatures below -40°C, the CD74HC85M96 is the appropriate choice. For applications with minimum operating temperatures at or above -40°C, either part is suitable. Both are in active production with adequate inventory.