CD74HC373M Equivalent & Substitute Parts

Part Overview

The CD74HC373M is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output in a 20-SOIC package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. The CD74HC373M operates across a 2V to 6V supply range with a 30ns propagation delay and supports operating temperatures from -55°C to 125°C. Equivalent substitutes maintain the same logic function, circuit configuration, and package footprint while offering varying availability, compliance status, and performance characteristics.

Substiute Parts

CD74HC373M

Texas InstrumentsIn Stock: 1775CD74HC373M Datasheet

Current PartRFQ

CD74HC373M96

Harris CorporationIn Stock: 8329CD74HC373M96 Datasheet

DirectRFQ

CD74HC573M

Harris CorporationIn Stock: 68697CD74HC573M Datasheet

Parametric EquivalentRFQ

MC74HC373ADWR2G

onsemiIn Stock: 3389MC74HC373ADWR2G Datasheet

DirectRFQ

MM74HC373WM

Fairchild SemiconductorIn Stock: 1608MM74HC373WM Datasheet

DirectRFQ

74HC373D,653

Nexperia USA Inc.In Stock: 207174HC373D,653 Datasheet

MFR RecommendedRFQ

74HC373D-Q100,118

Nexperia USA Inc.In Stock: 299574HC373D-Q100,118 Datasheet

MFR RecommendedRFQ

MC74HC373ADWG

onsemiIn Stock: 2809MC74HC373ADWG Datasheet

MFR RecommendedRFQ

MM74HC373WMX

onsemiIn Stock: 1600MM74HC373WMX Datasheet

MFR RecommendedRFQ

MC74HC573ADWG

onsemiIn Stock: 972MC74HC573ADWG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC373M is determined by strict adherence to the following parameters:

Critical Substitution Parameters:

• Logic Type: D-Type Transparent Latch (non-negotiable)
• Circuit Configuration: 8:8 (non-negotiable)
• Output Type: Tri-State (non-negotiable)
• Voltage Supply Range: 2V ~ 6V (non-negotiable)
• Package / Case: 20-SOIC (0.295", 7.50mm Width) (non-negotiable)
• Mounting Type: Surface Mount (non-negotiable)

Allowable Variation Parameters:

• Propagation Delay: 12ns to 30ns (faster or equal performance acceptable)
• Operating Temperature Range: -40°C ~ 85°C to -55°C ~ 125°C (equal or extended range acceptable)
• Output Current: 7.8mA (consistent across all substitutes)
• RoHS Compliance: ROHS3 Compliant preferred for new designs
• Manufacturer: Multiple qualified manufacturers (Texas Instruments, Harris Corporation, onsemi, Fairchild Semiconductor, Nexperia USA Inc.)

Substitutes are grouped by direct manufacturer equivalence (identical base product number 74HC373) and parametric equivalence (base product number 74HC573 with identical functional parameters).

Parameter Comparison

Engineering Selection Recommendations

For New Designs (Preferred): Select from active product status parts with ROHS3 compliance: MC74HC373ADWR2G, 74HC373D,653, 74HC373D-Q100,118, MC74HC373ADWG, MM74HC373WMX, or MC74HC573ADWG. These parts ensure long-term availability and regulatory compliance.

For Automotive Applications: The 74HC373D-Q100,118 from Nexperia USA Inc. carries AEC-Q100 qualification and is suitable for automotive-grade requirements.

For Extended Temperature Range (-55°C ~ 125°C): Select MC74HC373ADWR2G, MC74HC373ADWG, or MC74HC573ADWG from onsemi, or 74HC373D-Q100,118 from Nexperia USA Inc. These maintain the full -55°C to 125°C operating range of the original CD74HC373M.

For Fastest Propagation Delay: The 74HC373D,653 and 74HC373D-Q100,118 from Nexperia USA Inc. offer 12ns propagation delay, providing superior speed performance compared to the original 30ns specification.

For Existing Inventory Compatibility: If legacy stock of CD74HC373M96 or CD74HC573M exists, these remain functionally compatible despite obsolete status and non-compliant RoHS classification. Use only in applications where RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can I use 74HC573 variants as substitutes for 74HC373? A: Yes. The MC74HC573ADWG and CD74HC573M maintain identical electrical parameters (8:8 circuit, tri-state output, 2V ~ 6V supply, 7.8mA output current, 20-SOIC package) and are functionally equivalent despite different base product numbers.

Q: What is the difference between tube and tape & reel packaging? A: Tube packaging is suitable for manual assembly and lower-volume applications. Tape & Reel (TR) and Cut Tape (CT) packaging are designed for automated pick-and-place assembly. Both formats contain identical die and electrical specifications; selection depends on assembly process requirements.

Q: Why do some substitutes have faster propagation delays? A: Propagation delay variation (12ns to 30ns) reflects manufacturing process improvements across different manufacturers and product generations. Faster delays are acceptable substitutes as they provide equal or superior performance without affecting circuit compatibility.

Q: Is the MM74HC373WM suitable for -55°C applications? A: No. The MM74HC373WM operates only from -40°C to 85°C. For applications requiring -55°C operation, select MC74HC373ADWR2G, MC74HC373ADWG, 74HC373D-Q100,118, or MC74HC573ADWG.

Q: What does ROHS3 compliance mean for component selection? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements and is suitable for new product designs and markets with environmental regulations. Non-compliant parts (CD74HC373M96, CD74HC573M) are restricted in regulated markets.

Q: Can I substitute CD74HC373M with 74HC373D-Q100,118 in automotive applications? A: Yes. The 74HC373D-Q100,118 carries AEC-Q100 automotive qualification, making it suitable for automotive-grade applications while maintaining full electrical and package compatibility.

Q: Which substitute offers the best long-term availability? A: Active product status parts from major manufacturers (onsemi, Nexperia USA Inc.) offer superior long-term availability. MC74HC373ADWG, 74HC373D,653, and 74HC373D-Q100,118 are recommended for designs requiring extended production lifecycles.