SN74LVTH574DBR Equivalent & Substitute Parts

Part Overview

The SN74LVTH574DBR is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, configured as a single 8-bit element with tri-state, non-inverted output. This device operates at a clock frequency of 150 MHz with a maximum propagation delay of 4.5 ns at 3.3V with 50 pF load. The part is currently in active production status with 3184 units in stock.

Substitute parts become necessary due to supply constraints, manufacturing discontinuation, or packaging requirements in specific applications. The SN74LVTH574DBR is available in 20-SSOP packaging; alternative configurations may be required for different board layouts or assembly processes.

Substiute Parts

SN74LVTH574DBR

Texas InstrumentsIn Stock: 3285SN74LVTH574DBR Datasheet

Current PartRFQ

SN74LVTH374DBR

Texas InstrumentsIn Stock: 12301SN74LVTH374DBR Datasheet

Parametric EquivalentRFQ

74LVT574MTCX

onsemiIn Stock: 214174LVT574MTCX Datasheet

MFR RecommendedRFQ

74LVTH574MTCX

onsemiIn Stock: 421274LVTH574MTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LVTH574DBR is determined by the following critical parameters:

• Functional equivalence: D-Type flip-flop, 1 element, 8-bit configuration, tri-state non-inverted output
• Electrical performance: Clock frequency of 150 MHz, propagation delay specifications, voltage supply range 2.7V to 3.6V, output current ratings
• Trigger characteristic: Positive edge triggering
• Environmental compliance: ROHS3 compliance, MSL rating, operating temperature range -40°C to 85°C
• Packaging compatibility: Surface mount technology with specified package dimensions

Substitute parts are grouped into two categories:

1. Parametric Equivalent (SN74LVTH374DBR): Identical electrical specifications and 20-SSOP packaging, differing only in internal flip-flop configuration (D-Type with different latch arrangement).

2. Manufacturer Recommended Alternatives (74LVT574MTCX, 74LVTH574MTCX): Functionally equivalent with matching electrical performance but in 20-TSSOP packaging (0.173", 4.40mm Width), requiring PCB layout adjustment. These parts maintain the same voltage supply, clock frequency, and output characteristics.

Parameter Comparison

Engineering Selection Recommendations

SN74LVTH374DBR is the primary parametric equivalent to SN74LVTH574DBR. Both parts are manufactured by Texas Instruments, maintain active production status, and are ROHS3 compliant with identical electrical specifications and 20-SSOP packaging. This substitute requires no PCB layout modifications and provides direct pin-for-pin compatibility.

74LVT574MTCX and 74LVTH574MTCX are manufacturer-recommended alternatives from onsemi. Both parts meet the functional and electrical requirements with propagation delay of 4.6 ns (0.1 ns variance from the primary part). These parts are designated as Last Time Buy status, indicating limited future availability. The 20-TSSOP packaging (0.173" width versus 0.209" for SSOP) requires PCB footprint redesign. Input capacitance increases to 4 pF compared to 3 pF in the primary part. Selection of these alternatives is appropriate only when package size reduction is a design requirement or when supply of the primary part is constrained.

All substitute parts maintain ROHS3 compliance, MSL rating of 1, and identical operating temperature range, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can SN74LVTH374DBR be used as a direct replacement for SN74LVTH574DBR?

A: Yes. Both parts are D-Type flip-flops with 8-bit configuration, tri-state non-inverted output, 150 MHz clock frequency, and identical electrical specifications. The 20-SSOP packaging is identical, allowing direct PCB substitution without layout modification.

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

A: 20-SSOP measures 0.209" (5.30mm) in width, while 20-TSSOP measures 0.173" (4.40mm) in width. Both are surface mount packages with 20 pins, but the TSSOP variant is narrower. PCB footprints are not interchangeable; design modification is required to use TSSOP packages.

Q: Why are 74LVT574MTCX and 74LVTH574MTCX marked as Last Time Buy?

A: Last Time Buy status indicates that the manufacturer has announced end-of-life for these parts. Existing inventory may be available, but future production is not planned. These parts should be selected only when necessary for specific design requirements, such as package size constraints.

Q: Is there a propagation delay difference between the primary part and the onsemi alternatives?

A: Yes. The SN74LVTH574DBR and SN74LVTH374DBR specify 4.5 ns maximum propagation delay at 3.3V with 50 pF load. The 74LVT574MTCX and 74LVTH574MTCX specify 4.6 ns under the same conditions. This 0.1 ns difference is within typical design margins for most applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SN74LVTH574DBR, SN74LVTH374DBR, 74LVT574MTCX, and 74LVTH574MTCX are all ROHS3 compliant with MSL rating of 1 (Unlimited), meeting environmental and regulatory requirements.

Q: What is the input capacitance difference between substitute parts?

A: The primary part and SN74LVTH374DBR specify 3 pF input capacitance. The onsemi alternatives (74LVT574MTCX and 74LVTH574MTCX) specify 4 pF input capacitance. This 1 pF increase may affect circuit timing in high-frequency applications with tight timing margins.