SN74F74DG4 Equivalent & Substitute Parts

Part Overview

The SN74F74DG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments in the 74F series. This component functions as a 2-element D-type flip-flop with complementary outputs, designed for digital logic applications requiring edge-triggered storage and state management. The SN74F74DG4 is classified as Last Time Buy, indicating limited availability and the necessity to identify equivalent substitute parts for ongoing design requirements and production continuity.

Substiute Parts

SN74F74DG4

Texas InstrumentsIn Stock: 945SN74F74DG4 Datasheet

Current PartRFQ

SN74F74DR

Texas InstrumentsIn Stock: 8068SN74F74DR Datasheet

MFR RecommendedRFQ

SN74F74D

Texas InstrumentsIn Stock: 5804SN74F74D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74F74DG4 are qualified based on strict electrical and mechanical compatibility within the 74F logic family. The following parameters determine substitution eligibility:

• Functional equivalence: Dual D-type flip-flop with 2 elements, 1 bit per element, complementary outputs
• Electrical specifications: 145 MHz clock frequency, positive edge trigger, 4.5V–5.5V supply voltage, 0°C–70°C operating temperature range
• Package compatibility: 14-SOIC (0.154", 3.90mm Width) surface mount package
• Compliance standards: ROHS3 compliance, MSL Level 1, REACH unaffected status

The SN74F74DR and SN74F74D both meet these criteria as direct functional equivalents within the Texas Instruments 74F series. Differences in packaging format (Cut Tape & Digi-Reel versus Tube) and product status do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

SN74F74DR is the primary recommended substitute for the SN74F74DG4. This part maintains Active product status with Texas Instruments, ensuring long-term availability and supply chain continuity. The SN74F74DR is supplied in Cut Tape & Digi-Reel packaging format and demonstrates improved propagation delay performance (5.8ns versus 8ns), providing superior timing characteristics while maintaining full electrical and mechanical compatibility. ROHS3 compliance and MSL Level 1 certification align with the original part specifications.

SN74F74D serves as a secondary equivalent option. This part shares identical electrical specifications and 14-SOIC packaging with the SN74F74DG4 but carries Last Time Buy status, similar to the original part. Selection of SN74F74D should be considered only when SN74F74DR availability is constrained, as it does not provide the supply continuity advantage of an Active product.

Both substitute parts are fully compatible with designs currently utilizing the SN74F74DG4 without circuit modification or re-qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74F74DR and SN74F74D be used interchangeably with SN74F74DG4 in existing designs?

A: Yes. Both parts are direct functional equivalents with identical electrical specifications, trigger characteristics, and 14-SOIC package geometry. No circuit modifications are required for substitution.

Q: What is the difference between SN74F74DR and SN74F74D?

A: The primary difference is product status and packaging format. SN74F74DR is Active with Cut Tape & Digi-Reel packaging, while SN74F74D is Last Time Buy with Tube packaging. Electrically and mechanically, both are equivalent. SN74F74DR is preferred for new designs due to active product status.

Q: Why does SN74F74DR show faster propagation delay (5.8ns) compared to SN74F74DG4 (8ns)?

A: Both parts meet the same functional specifications and are within the 74F series performance envelope. The propagation delay difference reflects manufacturing process variations within acceptable limits. Both parts operate at 145 MHz clock frequency and are suitable for the same applications.

Q: Are all three parts ROHS3 compliant?

A: Yes. SN74F74DG4, SN74F74DR, and SN74F74D are all ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: What packaging formats are available for these parts?

A: SN74F74DG4 is supplied in Tube packaging. SN74F74DR is supplied in Cut Tape & Digi-Reel format. SN74F74D is supplied in Tube packaging. All three use the same 14-SOIC (0.154", 3.90mm Width) surface mount package footprint.