74ACT574MTC Equivalent & Substitute Parts

Part Overview

The 74ACT574MTC 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 as a standard positive edge-triggered flip-flop in the 74ACT series, housed in a 20-TSSOP surface mount package.

The 74ACT574MTC is classified as obsolete. Equivalent and substitute parts are available from active product lines, offering improved availability and compliance certifications while maintaining functional and electrical compatibility within specified parameters.

Substiute Parts

74ACT574MTC

onsemiIn Stock: 99074ACT574MTC Datasheet

Current PartRFQ

MC74ACT574DTR2G

onsemiIn Stock: 3575MC74ACT574DTR2G Datasheet

DirectRFQ

SN74ACT574PWR

Texas InstrumentsIn Stock: 2430SN74ACT574PWR Datasheet

DirectRFQ

SN74ACT574DBR

Texas InstrumentsIn Stock: 2034SN74ACT574DBR Datasheet

SimilarRFQ

SN74ACT574PW

Texas InstrumentsIn Stock: 1303SN74ACT574PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT574MTC is determined by the following critical parameters:

• Functional equivalence: D-type flip-flop, 1 element, 8-bit configuration, tri-state non-inverted output, positive edge trigger
• Electrical compatibility: Voltage supply 4.5V to 5.5V, operating temperature -40°C to 85°C
• Package compatibility: 20-TSSOP or 20-SSOP surface mount packages
• Series alignment: 74ACT logic family

Substitute parts are classified into three categories:

Direct Manufacturer Equivalents maintain identical electrical specifications and package dimensions (20-TSSOP).

Similar Parts provide functional equivalence with package variations (20-SSOP instead of 20-TSSOP), requiring PCB layout adjustment.

Parametric Equivalents meet all functional and electrical requirements with minor specification variations in quiescent current or propagation delay, within acceptable operating margins.

Parameter Comparison

Engineering Selection Recommendations

MC74ACT574DTR2G (onsemi) is the primary direct equivalent, maintaining the same manufacturer lineage as the obsolete 74ACT574MTC. This part is active and ROHS3 compliant, with identical package dimensions and electrical specifications. Quiescent current is reduced to 8 µA compared to the original 40 µA, representing improved power efficiency. Tape & Reel packaging supports high-volume production requirements.

SN74ACT574PWR (Texas Instruments) provides the best electrical performance among substitutes, with propagation delay reduced to 7ns and quiescent current at 4 µA. This part maintains identical package dimensions (20-TSSOP) and is ROHS3 compliant. Active product status ensures long-term availability. Tape & Reel packaging is standard for manufacturing environments.

SN74ACT574PW (Texas Instruments) offers parametric equivalence with identical electrical specifications to SN74ACT574PWR but is supplied in Tube packaging. Product status is discontinued at DiGi Electronics, indicating limited future availability. This part is suitable for applications where existing inventory is available.

SN74ACT574DBR (Texas Instruments) provides functional equivalence with a package variation: 20-SSOP (0.209", 5.30mm width) instead of 20-TSSOP (0.173", 4.40mm width). This wider package requires PCB layout modification and is not recommended as a direct drop-in replacement. Selection of this part is appropriate only when PCB redesign is feasible and the wider package footprint is acceptable.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT574DTR2G directly replace 74ACT574MTC without PCB modification?

A: Yes. MC74ACT574DTR2G maintains identical package dimensions (20-TSSOP, 0.173", 4.40mm width) and electrical specifications. No PCB layout changes are required for direct substitution.

Q: What is the difference between SN74ACT574PWR and SN74ACT574PW?

A: Both parts are functionally and electrically identical. The primary difference is packaging format: SN74ACT574PWR is supplied in Tape & Reel (TR), while SN74ACT574PW is supplied in Tube. SN74ACT574PWR is recommended for new designs due to active product status.

Q: Why is SN74ACT574DBR listed as a similar part rather than a direct equivalent?

A: SN74ACT574DBR uses a 20-SSOP package (0.209", 5.30mm width) instead of the 20-TSSOP package (0.173", 4.40mm width) specified for the original part. The wider package footprint requires PCB redesign and is not a direct drop-in replacement.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts (MC74ACT574DTR2G, SN74ACT574PWR, SN74ACT574DBR, SN74ACT574PW) are ROHS3 compliant. The original 74ACT574MTC does not specify RoHS status.

Q: What is the impact of reduced quiescent current in substitute parts?

A: Substitute parts exhibit lower quiescent current (4 to 8 µA) compared to the original 74ACT574MTC (40 µA). This represents improved power efficiency and reduced standby power consumption, with no negative impact on functional performance.

Q: Which substitute part offers the best performance?

A: SN74ACT574PWR provides the lowest propagation delay (7ns) and lowest quiescent current (4 µA) among all substitutes, with active product status and ROHS3 compliance. This part is recommended for new designs requiring optimal electrical performance.