74ACTQ374SC Equivalent & Substitute Parts

Part Overview

The 74ACTQ374SC is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and tri-state, non-inverted output configuration. This component operates at a clock frequency of 85 MHz with a maximum propagation delay of 9ns at 5V with 50pF load, housed in a 20-SOIC surface mount package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

74ACTQ374SC

onsemiIn Stock: 181274ACTQ374SC Datasheet

Current PartRFQ

MC74ACT374DWG

onsemiIn Stock: 2288MC74ACT374DWG Datasheet

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MC74ACT374DWR2G

onsemiIn Stock: 1886MC74ACT374DWR2G Datasheet

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CD74ACT374M

Harris CorporationIn Stock: 1946CD74ACT374M Datasheet

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CD74ACT374M96

Texas InstrumentsIn Stock: 2372CD74ACT374M96 Datasheet

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SN74ACT374DW

Texas InstrumentsIn Stock: 3404SN74ACT374DW Datasheet

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SN74ACT374DWR

Texas InstrumentsIn Stock: 2450SN74ACT374DWR Datasheet

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SN74ACT374NSR

Texas InstrumentsIn Stock: 2308SN74ACT374NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACTQ374SC is determined by the following critical parameters:

Core Functional Parameters:

• D-Type flip-flop configuration with 1 element and 8-bit capacity
• Tri-state, non-inverted output type
• Positive edge trigger mechanism
• 20-SOIC surface mount package

Electrical Compatibility Parameters:

• Voltage supply range: 4.5V ~ 5.5V
• Output current capability: 24mA high and low
• Operating temperature range: -40°C ~ 85°C minimum
• Clock frequency: minimum 85 MHz
• Maximum propagation delay: 9ns or better at 5V, 50pF load

Substitute parts must maintain compatibility across all core functional parameters and meet or exceed the electrical specifications. Parts with improved performance characteristics (higher clock frequency, lower propagation delay, lower quiescent current) are acceptable substitutes provided they maintain backward compatibility with the original design requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compatibility):

SN74ACT374DWR and SN74ACT374DW from Texas Instruments are the preferred substitutes. Both parts exceed the original 74ACTQ374SC specifications with 160 MHz clock frequency and superior 8.5ns propagation delay. These parts maintain the identical 20-SOIC (0.295", 7.50mm Width) package footprint, ensuring direct PCB compatibility. Both are ROHS3 compliant and actively manufactured.

MC74ACT374DWG and MC74ACT374DWR2G from onsemi provide equivalent substitution with 160 MHz operation and 10ns propagation delay. These parts are actively produced and ROHS3 compliant, offering the same package dimensions as the original part.

Extended Temperature Range Alternative:

CD74ACT374M96 from Texas Instruments extends the operating temperature range to -55°C ~ 125°C while maintaining active production status and ROHS3 compliance. This part operates at 110 MHz with 11.2ns propagation delay, suitable for applications requiring wider temperature operation.

Packaging Consideration:

SN74ACT374NSR uses a narrower 20-SOIC package (0.209", 5.30mm Width) compared to the original 0.295" width. This part requires PCB layout verification before implementation.

Avoid:

CD74ACT374M from Harris Corporation is obsolete and RoHS non-compliant, making it unsuitable for new designs despite extended temperature range capability.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74ACTQ374SC with SN74ACT374DWR on my PCB?

A: Yes. SN74ACT374DWR maintains identical 20-SOIC (0.295", 7.50mm Width) package dimensions and pinout. The part exceeds original specifications with higher clock frequency (160 MHz vs 85 MHz) and faster propagation delay (8.5ns vs 9ns), ensuring full backward compatibility.

Q: What is the difference between MC74ACT374DWG and MC74ACT374DWR2G?

A: Both parts are electrically identical with matching specifications. The primary difference is packaging format: DWG is supplied in Tube packaging, while DWR2G is supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements.

Q: Why does SN74ACT374NSR have a different package width?

A: SN74ACT374NSR uses a narrower 20-SOIC package (0.209" vs 0.295" width). While electrically compatible, this requires verification of PCB pad spacing and component placement clearances before substitution.

Q: Is the 74ACTQ374SC still available for procurement?

A: The 74ACTQ374SC is classified as obsolete. Active substitutes such as SN74ACT374DWR, MC74ACT374DWG, and MC74ACT374DWR2G are recommended for new procurement and design implementations.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Most active substitutes are ROHS3 compliant. CD74ACT374M is RoHS non-compliant and should not be used in applications requiring RoHS certification. Verify compliance requirements for your specific application.

Q: Can I use CD74ACT374M96 if my application requires extended temperature operation?

A: Yes. CD74ACT374M96 operates across -55°C ~ 125°C and is actively manufactured with ROHS3 compliance. However, propagation delay increases to 11.2ns, which may impact timing-critical applications. Verify timing margins before implementation.