SN74LVC2G74DCURE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC2G74DCURE4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in an 8-VFSOP surface mount package. This component functions as a Set/Preset and Reset flip-flop with complementary outputs, operating across a supply voltage range of 1.65V to 5.5V. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components to maintain design continuity and procurement availability.

Substiute Parts

SN74LVC2G74DCURE4

Texas InstrumentsIn Stock: 1239SN74LVC2G74DCURE4 Datasheet

Current PartRFQ

SN74LVC2G74DCUR

Texas InstrumentsIn Stock: 5276SN74LVC2G74DCUR Datasheet

MFR RecommendedRFQ

SN74LVC2G74DCUT

Texas InstrumentsIn Stock: 3703SN74LVC2G74DCUT Datasheet

Parametric EquivalentRFQ

74LVC1G74DC,125

Nexperia USA Inc.In Stock: 326474LVC1G74DC,125 Datasheet

MFR RecommendedRFQ

74LVC2G74DC,125

Nexperia USA Inc.In Stock: 1988974LVC2G74DC,125 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LVC2G74DCURE4 is determined by the following critical parameters:

Functional Equivalence: All substitute parts must be D-type flip-flops with Set/Preset and Reset functions, complementary outputs, and single-element, single-bit configuration.

Electrical Compatibility: Supply voltage range (1.65V ~ 5.5V), output drive capability (32 mA), and operating temperature range (-40°C ~ 125°C) must be maintained or exceeded.

Package Compatibility: All substitutes must use the 8-VFSOP surface mount package with identical footprint dimensions (0.091", 2.30mm Width).

Timing Parameters: Clock frequency and propagation delay specifications determine application suitability. The main part operates at 140 MHz with 5.1 ns maximum propagation delay at 5V, 50pF load.

Compliance Requirements: RoHS3 compliance and MSL Level 1 rating are mandatory for environmental and handling consistency.

The substitute parts are grouped into two categories: MFR Recommended substitutes (active product status with enhanced or equivalent performance) and Parametric Equivalents (active product status with comparable electrical characteristics).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74LVC2G74DCUR

The SN74LVC2G74DCUR is the MFR Recommended substitute from Texas Instruments. This part maintains identical functional and electrical specifications to the discontinued SN74LVC2G74DCURE4 while offering improved clock frequency performance (200 MHz versus 140 MHz) and faster propagation delay (4.4 ns versus 5.1 ns). The part is in active production status with substantial inventory availability (5199 pcs). Packaging is Cut Tape (CT) & Digi-Reel format, suitable for both manual and automated assembly operations. This substitute provides direct functional replacement with performance enhancement.

Secondary Recommendation: SN74LVC2G74DCUT

The SN74LVC2G74DCUT is a parametric equivalent from Texas Instruments in Tape & Reel (TR) packaging. This part maintains the original 140 MHz clock frequency specification with propagation delay of 5.4 ns, closely matching the discontinued part's timing characteristics. Active product status and 3610 pcs inventory availability support procurement continuity. This substitute is optimal for high-volume automated assembly requiring reel packaging.

Alternative Recommendation: 74LVC2G74DC,125

The 74LVC2G74DC,125 from Nexperia USA Inc. provides functional equivalence with enhanced performance (200 MHz clock frequency, 4.1 ns propagation delay). This part is in active production with the highest inventory availability (19788 pcs) among all substitutes. Quiescent current is elevated at 40 µA compared to the main part's 10 µA, which may impact low-power applications. Input capacitance is reduced to 4 pF. This substitute is suitable for applications where power consumption is not a critical constraint.

Cross-Manufacturer Alternative: 74LVC1G74DC,125

The 74LVC1G74DC,125 from Nexperia USA Inc. is a single-element variant offering the lowest quiescent current (4 µA) and fastest propagation delay (4.1 ns). This part is suitable for power-sensitive applications requiring enhanced timing performance. Active product status and 3221 pcs inventory support procurement. The reduced input capacitance (4 pF) may require circuit design verification in capacitive-load-sensitive applications.

All recommended substitutes maintain RoHS3 compliance, MSL Level 1 rating, and identical 8-VFSOP surface mount package compatibility with the discontinued part.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC2G74DCUR directly replace the SN74LVC2G74DCURE4 without circuit modification?

A: Yes. The SN74LVC2G74DCUR maintains identical functional specifications, electrical characteristics, and package footprint. The improved clock frequency (200 MHz) and faster propagation delay (4.4 ns) are backward-compatible enhancements that do not require circuit redesign.

Q: What is the difference between the SN74LVC2G74DCUR and SN74LVC2G74DCUT?

A: Both parts are from Texas Instruments with identical functional specifications. The primary difference is packaging format: SN74LVC2G74DCUR is supplied in Cut Tape (CT) & Digi-Reel format suitable for mixed manual/automated assembly, while SN74LVC2G74DCUT is supplied in Tape & Reel (TR) format optimized for high-volume automated assembly. The SN74LVC2G74DCUR offers enhanced clock frequency (200 MHz) compared to the DCUT variant (140 MHz).

Q: Why does the 74LVC2G74DC,125 from Nexperia have higher quiescent current (40 µA) than the main part (10 µA)?

A: Quiescent current variation reflects different manufacturing processes and design implementations between Texas Instruments and Nexperia. The 74LVC2G74DC,125 remains within acceptable operating parameters for most applications. Applications with strict power budgets should prioritize the 74LVC1G74DC,125 (4 µA) or maintain the Texas Instruments SN74LVC2G74DCUR (10 µA).

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 8-VFSOP surface mount package with identical footprint dimensions (0.091", 2.30mm Width). PCB layout and assembly processes require no modification.

Q: Which substitute part offers the best timing performance?

A: The 74LVC1G74DC,125 and 74LVC2G74DC,125 from Nexperia both offer the fastest propagation delay at 4.1 ns, compared to the main part's 5.1 ns. The SN74LVC2G74DCUR provides 4.4 ns propagation delay. Selection depends on application timing requirements and power consumption constraints.

Q: Do all substitute parts meet RoHS3 and MSL Level 1 requirements?

A: Yes. All recommended substitute parts are RoHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the environmental and handling specifications of the discontinued SN74LVC2G74DCURE4.

Q: What is the inventory status of each substitute part?

A: SN74LVC2G74DCUR: 5199 pcs; SN74LVC2G74DCUT: 3610 pcs; 74LVC1G74DC,125: 3221 pcs; 74LVC2G74DC,125: 19788 pcs. The 74LVC2G74DC,125 offers the highest availability for immediate procurement.