74LVTH574MSA Equivalent & Substitute Parts

Part Overview

The 74LVTH574MSA is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit positive edge triggering capability. This component operates at a clock frequency of 150 MHz with tri-state, non-inverted output configuration. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Texas Instruments manufactures several active alternatives that maintain functional and electrical compatibility with the original onsemi design.

Substiute Parts

74LVTH574MSA

onsemiIn Stock: 85874LVTH574MSA Datasheet

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SN74LVT574PWR

Texas InstrumentsIn Stock: 2806SN74LVT574PWR Datasheet

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SN74LVTH574DB

Texas InstrumentsIn Stock: 1677SN74LVTH574DB Datasheet

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SN74LVTH574DBR

Texas InstrumentsIn Stock: 3285SN74LVTH574DBR Datasheet

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SN74LVTH574IPWREP

Texas InstrumentsIn Stock: 691SN74LVTH574IPWREP Datasheet

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SN74LVTH574PW

Texas InstrumentsIn Stock: 956SN74LVTH574PW Datasheet

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SN74LVTH574PWR

Texas InstrumentsIn Stock: 5447SN74LVTH574PWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LVTH574MSA is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• D-Type flip-flop function with 1 element and 8-bit configuration
• Tri-state, non-inverted output type
• Positive edge trigger mechanism
• 150 MHz clock frequency capability
• 2.7V to 3.6V supply voltage range
• -40°C to 85°C operating temperature range
• 32mA output high current and 64mA output low current
• 190 µA quiescent current
• 4 pF input capacitance

Mechanical Compatibility Criteria:

• Surface mount packaging
• 20-pin package configuration (SSOP or TSSOP variants)
• Moisture sensitivity level 1

Substitute parts are grouped into two package variants: 20-SSOP (0.209", 5.30mm width) and 20-TSSOP (0.173", 4.40mm width). Both variants maintain full electrical equivalence to the original part.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (20-SSOP Package): SN74LVTH574DB and SN74LVTH574DBR are direct mechanical and electrical equivalents to the 74LVTH574MSA, maintaining identical 20-SSOP package dimensions (0.209", 5.30mm width). Both parts are manufactured by Texas Instruments and carry active product status with ROHS3 compliance. These parts demonstrate marginally improved propagation delay performance (4.5ns versus 4.6ns) and reduced input capacitance (3 pF versus 4 pF), providing enhanced timing margins in equivalent circuit applications.

Alternative Substitutes (20-TSSOP Package): SN74LVTH574PW, SN74LVTH574PWR, and SN74LVTH574IPWREP utilize the 20-TSSOP package (0.173", 4.40mm width), offering a narrower footprint suitable for space-constrained designs. These parts maintain full electrical equivalence and active product status. Package selection between SSOP and TSSOP variants depends on PCB layout requirements and mechanical constraints.

Cross-Series Alternative: SN74LVT574PWR (74LVT series) provides functional equivalence with a propagation delay specification of 6.6ns at 3.3V and 50pF load. This extended delay characteristic may require timing verification in applications with critical path constraints. This part remains suitable for non-timing-critical applications requiring 74LVT series compatibility.

All substitute parts maintain REACH compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74LVTH574MSA with SN74LVTH574DB in my existing design?

A: Yes. SN74LVTH574DB is a direct substitute maintaining identical electrical specifications and 20-SSOP package dimensions. No circuit modifications are required. The part is pin-compatible and functionally equivalent.

Q: What is the difference between 20-SSOP and 20-TSSOP package variants?

A: Both packages contain identical die and electrical specifications. The primary difference is physical footprint width: 20-SSOP measures 0.209" (5.30mm) while 20-TSSOP measures 0.173" (4.40mm). Package selection depends on PCB layout space availability. Electrical performance is equivalent across both variants.

Q: Why does SN74LVT574PWR show 6.6ns propagation delay versus 4.5ns for other substitutes?

A: SN74LVT574PWR belongs to the 74LVT series rather than 74LVTH series. The extended propagation delay reflects different internal circuit design. This part remains functionally compatible but requires timing verification in applications with critical path constraints below 6.6ns.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Texas Instruments substitute parts (SN74LVTH574DB, SN74LVTH574DBR, SN74LVTH574PW, SN74LVTH574PWR, SN74LVT574PWR, SN74LVTH574IPWREP) carry ROHS3 compliance certification. The original onsemi 74LVTH574MSA does not specify RoHS status.

Q: What packaging options are available for procurement?

A: Substitute parts are available in Tube and Tape & Reel (TR) packaging. SN74LVTH574DB is supplied in Tube packaging. SN74LVTH574DBR, SN74LVTH574PWR, SN74LVT574PWR, and SN74LVTH574IPWREP are supplied in Tape & Reel format. SN74LVTH574PW is supplied in Tube packaging. Packaging selection depends on production volume and assembly requirements.

Q: Is the 74LVTH574MSA still available for purchase?

A: The 74LVTH574MSA is classified as obsolete. Active substitute parts from Texas Instruments are recommended for new designs and ongoing procurement. Existing inventory of the original part may be available through component distributors, but long-term availability cannot be assured.

Q: Can I use these substitutes in applications requiring extended temperature ranges beyond -40°C to 85°C?

A: No. All listed parts, including the original 74LVTH574MSA and all substitutes, are specified for -40°C to 85°C operating temperature range. Applications requiring extended temperature operation require alternative component selection outside this family.