74ACT374SCX Equivalent & Substitute Parts

Part Overview

The 74ACT374SCX is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and tri-state, non-inverted outputs. This component operates at a clock frequency of 160 MHz with a maximum propagation delay of 10ns at 5V with 50pF load. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

74ACT374SCX

onsemiIn Stock: 327774ACT374SCX Datasheet

Current PartRFQ

MC74ACT374DWR2G

onsemiIn Stock: 1886MC74ACT374DWR2G Datasheet

DirectRFQ

MC74ACT374DWG

onsemiIn Stock: 2288MC74ACT374DWG Datasheet

SimilarRFQ

SN74ACT374DW

Texas InstrumentsIn Stock: 3404SN74ACT374DW Datasheet

DirectRFQ

SN74ACT374DWR

Texas InstrumentsIn Stock: 2450SN74ACT374DWR Datasheet

DirectRFQ

SN74ACT574DWR

Texas InstrumentsIn Stock: 18738SN74ACT574DWR Datasheet

DirectRFQ

74AHCT374D,118

Nexperia USA Inc.In Stock: 301074AHCT374D,118 Datasheet

SimilarRFQ

CD74ACT374M

Harris CorporationIn Stock: 1946CD74ACT374M Datasheet

SimilarRFQ

CD74ACT374M96

Texas InstrumentsIn Stock: 2372CD74ACT374M96 Datasheet

SimilarRFQ

SN74ACT374NSR

Texas InstrumentsIn Stock: 2308SN74ACT374NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACT374SCX are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• D-Type flip-flop architecture with 1 element, 8-bit configuration
• Tri-state, non-inverted output configuration
• Positive edge trigger operation
• 20-SOIC package form factor (0.295", 7.50mm Width)
• Supply voltage range 4.5V ~ 5.5V
• Operating temperature range -40°C ~ 85°C
• Clock frequency capability of 160 MHz or greater
• Maximum propagation delay of 10ns or less at 5V, 50pF load

Direct Substitutes maintain identical electrical specifications and package dimensions, enabling pin-for-pin replacement without circuit modification.

Similar Substitutes share the same functional architecture and package but may exhibit variations in propagation delay, quiescent current, output current drive, or operating temperature range. These parts require verification of timing and thermal performance within the target application.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74ACT374DWR (Texas Instruments)

SN74ACT374DWR is the preferred direct substitute for 74ACT374SCX. This part maintains active product status with ROHS3 compliance and RoHS certification. It delivers superior propagation delay performance (8.5ns versus 10ns) and significantly reduced quiescent current (4µA versus 40µA), resulting in lower power consumption. The part is available in Cut Tape and Digi-Reel packaging with 2,401 units in stock.

Secondary Recommendation: MC74ACT374DWR2G (onsemi)

MC74ACT374DWR2G provides direct electrical equivalence to the original part with active product status and ROHS3 compliance. This option maintains the same manufacturer lineage as the obsolete 74ACT374SCX. Quiescent current is reduced to 8µA compared to the original 40µA. The part is supplied in Tape & Reel packaging with 1,789 units in stock.

Alternative for Extended Temperature Range: CD74ACT374M96 (Texas Instruments)

CD74ACT374M96 extends the operating temperature range to -55°C ~ 125°C, suitable for applications requiring enhanced thermal performance. This part maintains 24mA output current drive and active product status with ROHS3 compliance. Clock frequency is reduced to 110 MHz with propagation delay of 11.2ns, requiring timing verification in the target application.

Package Variant: SN74ACT374NSR (Texas Instruments)

SN74ACT374NSR offers identical electrical performance to SN74ACT374DWR but in a narrower 20-SOIC package (0.209", 5.30mm Width versus 0.295", 7.50mm Width). This variant is suitable only if PCB layout accommodates the reduced package width.

Not Recommended: 74AHCT374D,118 (Nexperia USA Inc.)

While 74AHCT374D,118 maintains functional compatibility, the reduced output current drive (8mA versus 24mA) may limit fan-out capability in applications requiring higher drive strength. This part is suitable only for low-current applications.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT374DWR directly replace 74ACT374SCX without circuit modification?

A: Yes. SN74ACT374DWR is a direct pin-for-pin substitute with identical package dimensions (20-SOIC, 0.295", 7.50mm Width), supply voltage range (4.5V ~ 5.5V), and output configuration (tri-state, non-inverted). No circuit changes are required.

Q: What is the difference between MC74ACT374DWR2G and MC74ACT374DWG?

A: Both parts are electrically identical with identical specifications. The primary difference is packaging: MC74ACT374DWR2G is supplied in Tape & Reel (TR) format, while MC74ACT374DWG is supplied in Tube format. Selection depends on assembly process requirements.

Q: Why does SN74ACT374DWR have lower quiescent current (4µA) than 74ACT374SCX (40µA)?

A: Quiescent current variation reflects manufacturing process improvements and design refinements between product generations. The lower value in SN74ACT374DWR represents improved power efficiency without compromising functional performance.

Q: Is SN74ACT574DWR a suitable substitute for 74ACT374SCX?

A: SN74ACT574DWR shares the same package and basic D-type flip-flop architecture but operates at reduced clock frequency (110 MHz versus 160 MHz) with increased propagation delay (11ns versus 10ns). This part is suitable only if the application timing requirements accommodate these reduced performance specifications.

Q: What does "Last Time Buy" status mean for SN74ACT374DW?

A: Last Time Buy indicates that Texas Instruments has announced end-of-life for this part. While currently available, future procurement may become difficult. SN74ACT374DWR (Active status) is the recommended alternative from the same manufacturer.

Q: Can 74AHCT374D,118 replace 74ACT374SCX in all applications?

A: 74AHCT374D,118 maintains functional compatibility but with reduced output current drive (8mA versus 24mA). Applications requiring 24mA output current cannot use this substitute. Additionally, the 74AHCT series represents a different logic family with different electrical characteristics.

Q: Why is the package width different for SN74ACT374NSR?

A: SN74ACT374NSR uses a narrower 20-SOIC package (0.209", 5.30mm Width) compared to the standard 20-SOIC (0.295", 7.50mm Width). This is a physical package variant that requires PCB layout verification before substitution.

Q: Are all recommended substitutes RoHS compliant?

A: SN74ACT374DWR, MC74ACT374DWR2G, MC74ACT374DWG, and CD74ACT374M96 are ROHS3 compliant. CD74ACT374M (Harris Corporation) is RoHS non-compliant and should not be used in applications requiring RoHS certification.