MM74HC374N Equivalent & Substitute Parts

Part Overview

The MM74HC374N is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit positive edge triggering in a 20-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The MM74HC374N operates within a 2V to 6V supply range with a maximum propagation delay of 40ns at 6V with 150pF load. Its tri-state, non-inverted output configuration supports standard logic applications requiring edge-triggered data storage and transfer.

Substiute Parts

MM74HC374N

onsemiIn Stock: 4026MM74HC374N Datasheet

Current PartRFQ

SN74HC374N

Texas InstrumentsIn Stock: 3360SN74HC374N Datasheet

DirectRFQ

CD74HC374E

Harris CorporationIn Stock: 1408CD74HC374E Datasheet

SimilarRFQ

SN74HC374AN

Texas InstrumentsIn Stock: 3111SN74HC374AN Datasheet

SimilarRFQ

SN74HC377N

Texas InstrumentsIn Stock: 2021SN74HC377N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC374N is determined by the following critical parameters:

• Package / Case: 20-DIP (0.300", 7.62mm) — physical and electrical compatibility
• Type: D-Type Flip-Flop with 1 element, 8-bit configuration
• Trigger Type: Positive Edge
• Output Type: Tri-State, Non-Inverted (or compatible output configuration)
• Voltage - Supply: 2V ~ 6V operating range
• Mounting Type: Through Hole

Substitute parts must maintain compatibility across these core parameters. Variations in clock frequency, propagation delay, and input capacitance are acceptable provided they do not degrade system performance. Output current ratings and quiescent current must remain within acceptable operational limits.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents)

SN74HC374N (Texas Instruments) and SN74HC374AN (Texas Instruments) are direct functional equivalents to the MM74HC374N. Both maintain identical electrical specifications for supply voltage, output type, trigger configuration, and package format. Both parts are currently in active production status with ROHS3 compliance certification, providing long-term availability and regulatory alignment for new designs.

Secondary Substitute (Extended Temperature Range)

CD74HC374E (Harris Corporation) provides functional equivalence with an extended operating temperature range of -55°C to 125°C, compared to the standard -40°C to 85°C range. This part is obsolete but may be retained in legacy system documentation. RoHS non-compliance status requires evaluation against current regulatory requirements.

Alternative Substitute (Modified Output Current)

SN74HC377N (Texas Instruments) is functionally compatible but features reduced output current ratings (5.2mA versus 7.8mA) and non-tri-state output configuration. This part is suitable only for applications where lower output drive capability is acceptable and tri-state functionality is not required. Active product status ensures availability.

Compliance and Availability Considerations

For new designs and ongoing procurement, SN74HC374N or SN74HC374AN are recommended based on active product status and ROHS3 compliance. Both parts are manufactured by Texas Instruments and maintain full electrical compatibility with the obsolete MM74HC374N.

Frequently Asked Questions (FAQ)

Q: Can SN74HC374N directly replace MM74HC374N in existing designs?

A: Yes. SN74HC374N maintains identical electrical specifications, package format, and functional behavior. No circuit modifications are required for direct substitution.

Q: What is the difference between SN74HC374N and SN74HC374AN?

A: Both parts are functionally equivalent D-Type flip-flops with identical electrical characteristics. The primary difference is propagation delay specification: SN74HC374N specifies 39ns at 150pF load, while SN74HC374AN specifies 31ns at 50pF load. Both are suitable replacements for MM74HC374N.

Q: Why is SN74HC377N listed as a substitute if it has different output current?

A: SN74HC377N maintains core functional compatibility (D-Type flip-flop, 8-bit, positive edge trigger, 20-DIP package, 2V-6V supply). However, reduced output current (5.2mA versus 7.8mA) and non-tri-state output configuration limit its applicability. Use only if circuit design accommodates these differences.

Q: Is CD74HC374E suitable for new designs?

A: CD74HC374E is obsolete and RoHS non-compliant. It is not recommended for new designs. The extended temperature range (-55°C to 125°C) may be relevant only for legacy system maintenance where this specific temperature capability is required.

Q: What packaging considerations apply to these substitutes?

A: All listed substitutes use identical 20-DIP (0.300", 7.62mm) through-hole packaging. Physical board layout and socket compatibility are maintained across all parts. No mechanical redesign is necessary.

Q: Are there supply voltage compatibility concerns?

A: All substitute parts operate within the 2V to 6V supply range specified for MM74HC374N. No voltage regulation modifications are required.