SN74AC374DW Equivalent & Substitute Parts

Part Overview

The SN74AC374DW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit capacity and tri-state, non-inverted output configuration. This component is classified as a standard logic device in the 74AC series and operates across a 2V to 6V supply voltage range with a maximum propagation delay of 8ns at 5V with 50pF load.

The SN74AC374DW is currently discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity, ensure component availability, and support ongoing production requirements. Substitute selection must account for functional equivalence, electrical performance parameters, and packaging compatibility.

Substiute Parts

SN74AC374DW

Texas InstrumentsIn Stock: 1972SN74AC374DW Datasheet

Current PartRFQ

SN74AC374DWR

Texas InstrumentsIn Stock: 2160SN74AC374DWR Datasheet

DirectRFQ

MC74AC374DWR2G

onsemiIn Stock: 3778MC74AC374DWR2G Datasheet

DirectRFQ

MC74AC377DWR2G

onsemiIn Stock: 1739MC74AC377DWR2G Datasheet

MFR RecommendedRFQ

MC74AC574DWG

onsemiIn Stock: 2608MC74AC574DWG Datasheet

MFR RecommendedRFQ

MC74AC574DWR2G

onsemiIn Stock: 2232MC74AC574DWR2G Datasheet

MFR RecommendedRFQ

MC74AC374DWG

onsemiIn Stock: 984MC74AC374DWG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AC374DW are classified based on functional and electrical equivalence within the 74AC logic family. The primary substitution criteria are:

Functional Equivalence: All substitute parts maintain D-Type flip-flop architecture with 1 element, 8-bit configuration, positive edge trigger, and tri-state output capability.

Electrical Compatibility: Substitute parts operate within the same 2V to 6V supply voltage range, support identical output current specifications (24mA high and low), and maintain compatible input capacitance (4.5 pF).

Package Compatibility: All substitute parts use the 20-SOIC (0.295", 7.50mm Width) surface mount package, ensuring mechanical and electrical pin compatibility.

Performance Parameters: Propagation delay and clock frequency variations are permitted within the 74AC series specifications. Quiescent current may vary between manufacturers while maintaining functional equivalence.

Compliance Status: All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): SN74AC374DWR is the primary direct substitute for SN74AC374DW. Both parts are manufactured by Texas Instruments, share identical electrical specifications (155 MHz clock frequency, 8ns propagation delay, 4 µA quiescent current), and maintain MSL 1 rating. The only difference is packaging format (Cut Tape & Digi-Reel versus bulk), making this the optimal choice for designs requiring no performance trade-offs.

Manufacturer-Equivalent Substitutes: MC74AC374DWR2G and MC74AC374DWG are onsemi equivalents maintaining the 74AC374 base product number with identical 155 MHz clock frequency and 8-bit D-Type configuration. These parts accept slightly higher propagation delay (9.5ns versus 8ns) and increased quiescent current (8 µA versus 4 µA). MSL rating increases to 3 (168 Hours), requiring appropriate moisture control during storage and handling. Both parts are active products with confirmed availability.

Functional Alternatives with Performance Variation: MC74AC377DWR2G and MC74AC574DWG/DWR2G represent functional alternatives within the 74AC logic family. MC74AC377DWR2G operates at reduced clock frequency (140 MHz) with 10ns propagation delay. MC74AC574 variants operate at 95 MHz clock frequency with 9.5ns propagation delay. These alternatives are suitable only for applications where reduced clock frequency does not impact system timing requirements.

Compliance and Availability: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. Product status verification confirms active manufacturing for all onsemi and Texas Instruments alternatives, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can SN74AC374DWR directly replace SN74AC374DW without circuit modification?

A: Yes. SN74AC374DWR is a direct functional and electrical equivalent. Both parts share identical specifications for clock frequency (155 MHz), propagation delay (8ns at 5V, 50pF), output current (24mA), and supply voltage range (2V to 6V). The only difference is packaging format. No circuit modifications are required.

Q: What is the difference between MC74AC374DWR2G and MC74AC374DWG?

A: Both parts are onsemi equivalents with identical electrical specifications. The difference is packaging: MC74AC374DWR2G is supplied in Tape & Reel format, while MC74AC374DWG is supplied in Tube format. Electrical performance and pin compatibility are identical.

Q: Why do onsemi parts show higher propagation delay (9.5ns) compared to the original SN74AC374DW (8ns)?

A: Propagation delay variation within the 74AC series is permitted by industry standards. The 9.5ns specification for onsemi parts remains within acceptable operating parameters for 74AC logic devices. Applications must verify that system timing requirements accommodate this specification before selection.

Q: Is the MSL 3 rating on onsemi parts a concern?

A: MSL 3 (168 Hours) requires moisture control during storage and handling but does not affect electrical performance or functionality. Standard moisture barrier packaging and storage conditions (per IPC-A-610 standards) are sufficient. This is standard practice for active production components.

Q: Can MC74AC574DWG replace SN74AC374DW?

A: MC74AC574DWG maintains tri-state, non-inverted output and 20-SOIC package compatibility. However, clock frequency is reduced to 95 MHz (versus 155 MHz original). This part is suitable only for applications where the lower clock frequency does not violate system timing requirements. Functional verification is required before substitution.

Q: What is the difference between MC74AC377DWR2G and SN74AC374DW?

A: MC74AC377DWR2G uses base product number 74AC377 (versus 74AC374) with reduced clock frequency (140 MHz versus 155 MHz) and increased propagation delay (10ns versus 8ns). Output type is non-inverted without tri-state capability. This part is not recommended as a direct substitute due to functional differences.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the regulatory compliance of the original SN74AC374DW.