SN74ACT574PW Equivalent & Substitute Parts

Part Overview

The SN74ACT574PW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering in a 20-TSSOP surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for direct board-level substitution.

Substiute Parts

SN74ACT574PW

Texas InstrumentsIn Stock: 1303SN74ACT574PW Datasheet

Current PartRFQ

SN74ACT574PWR

Texas InstrumentsIn Stock: 2430SN74ACT574PWR Datasheet

DirectRFQ

MC74ACT374DTR2G

onsemiIn Stock: 3521MC74ACT374DTR2G Datasheet

MFR RecommendedRFQ

MC74ACT574DTR2G

onsemiIn Stock: 3575MC74ACT574DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ACT574PW is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• D-Type flip-flop architecture with 1 element, 8-bit configuration
• Tri-State, Non-Inverted output type
• Positive edge trigger mechanism
• 20-TSSOP surface mount package (0.173", 4.40mm Width)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature: -40°C ~ 85°C
• Output current capability: 24 mA (high and low)
• RoHS3 compliance and MSL Level 1

Performance Parameters (Allowable Variation):

• Clock frequency: 100 MHz minimum
• Max propagation delay: 11 ns or better
• Quiescent current: up to 8 µA
• Input capacitance: 4.5 pF

Substitute parts must satisfy all mandatory criteria and maintain or exceed performance specifications.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT574PWR (Texas Instruments)

This part is the direct equivalent to SN74ACT574PW, differing only in packaging format (Tape & Reel versus Tube). It maintains identical electrical specifications and is currently in active production status. This is the primary substitute for applications requiring the exact same performance characteristics and manufacturer continuity.

MC74ACT574DTR2G (onsemi)

This part provides functional equivalence with identical base part number (74ACT574) and electrical specifications matching the original. It is manufactured by onsemi and maintains active product status. Quiescent current is slightly elevated at 8 µA compared to 4 µA in the original, which may impact low-power applications. This substitute is suitable for general-purpose applications where the increased quiescent current is acceptable.

MC74ACT374DTR2G (onsemi)

This part differs from the original in base part number (74ACT374 versus 74ACT574), indicating a different internal architecture. While it maintains the same package, pin count, and general D-Type flip-flop classification, the functional differences between 74ACT374 and 74ACT574 series require circuit-level verification before substitution. Clock frequency is higher at 160 MHz, and propagation delay is improved at 10 ns. This part is suitable only when circuit design permits the architectural differences between these series.

All substitute parts maintain RoHS3 compliance, MSL Level 1 rating, and the required operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT574PWR be used as a direct replacement for SN74ACT574PW?

A: Yes. SN74ACT574PWR is electrically and functionally identical to SN74ACT574PW. The only difference is packaging format: SN74ACT574PW is supplied in Tube packaging, while SN74ACT574PWR is supplied in Tape & Reel format. Both are manufactured by Texas Instruments and meet identical electrical specifications.

Q: What is the difference between MC74ACT574DTR2G and MC74ACT374DTR2G?

A: Both are onsemi-manufactured D-Type flip-flops in 20-TSSOP packages with 8-bit configurations. The primary difference is the base part number: 74ACT574 versus 74ACT374. These represent different internal architectures within the 74ACT logic family. The 74ACT374 variant has higher clock frequency (160 MHz) and faster propagation delay (10 ns), but functional differences require verification before substitution in existing designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. SN74ACT574PWR, MC74ACT574DTR2G, and MC74ACT374DTR2G are all ROHS3 compliant with MSL Level 1 rating, matching the original SN74ACT574PW specifications.

Q: What is the impact of increased quiescent current in onsemi parts?

A: MC74ACT574DTR2G and MC74ACT374DTR2G have quiescent current of 8 µA compared to 4 µA in the original. For most applications, this difference is negligible. However, in battery-powered or ultra-low-power designs where quiescent current is critical, the Texas Instruments SN74ACT574PWR is preferred.

Q: Can MC74ACT374DTR2G be used in place of SN74ACT574PW?

A: MC74ACT374DTR2G shares the same package, pin count, and general D-Type flip-flop function. However, the 74ACT374 and 74ACT574 series have different internal architectures. Direct substitution requires circuit-level analysis to confirm functional compatibility. Consult device datasheets for detailed pinout and timing specifications before implementation.

Q: What packaging formats are available for these substitutes?

A: SN74ACT574PWR is supplied in Tape & Reel (TR) format. MC74ACT574DTR2G and MC74ACT374DTR2G are also supplied in Tape & Reel format. The original SN74ACT574PW was supplied in Tube format but is discontinued. All parts use the same 20-TSSOP surface mount package.