SN74F74D Equivalent & Substitute Parts

Part Overview

The SN74F74D is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This component functions as a 2-element D-type flip-flop with complementary outputs, set/preset and reset capabilities, and positive edge triggering. The SN74F74D is classified as Last Time Buy, indicating discontinued production. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Substiute Parts

SN74F74D

Texas InstrumentsIn Stock: 5804SN74F74D Datasheet

Current PartRFQ

SN74F74DR

Texas InstrumentsIn Stock: 8068SN74F74DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74F74D is determined by strict equivalence across the following critical parameters:

Functional equivalence: Dual D-type flip-flop with 2 elements, 1 bit per element, complementary outputs, set/preset and reset functions, and positive edge triggering.

Electrical equivalence: Clock frequency of 145 MHz, maximum propagation delay of 5.8 ns at 5V with 50 pF load, output current specifications of 1 mA high and 20 mA low, quiescent current of 16 mA, and supply voltage range of 4.5V to 5.5V.

Package equivalence: 14-SOIC surface mount package with 0.154" width (3.90 mm).

Operating range equivalence: 0°C to 70°C ambient temperature rating.

Compliance equivalence: ROHS3 compliance, MSL Level 1, and REACH unaffected status.

The SN74F74DR meets all substitution criteria as a direct equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The SN74F74DR is the direct functional and electrical equivalent of the SN74F74D. Both parts share identical electrical specifications, package geometry, and compliance certifications. The primary distinction is product status: the SN74F74D is Last Time Buy, while the SN74F74DR maintains Active status with higher inventory availability (8047 units versus 5700 units).

For new designs and production continuity, the SN74F74DR is the appropriate selection. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

The packaging difference—Tube for SN74F74D versus Cut Tape and Digi-Reel for SN74F74DR—reflects distribution format only and does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SN74F74DR directly replace the SN74F74D in existing designs?

A: Yes. The SN74F74DR is electrically and functionally identical to the SN74F74D across all specified parameters, including clock frequency, propagation delay, output current, supply voltage, and operating temperature range. Pin configuration and package dimensions are identical.

Q: What is the difference between Tube and Cut Tape packaging?

A: Tube and Cut Tape are distribution formats only. Tube packaging supplies components in plastic tubes for manual handling, while Cut Tape and Digi-Reel provide components on continuous tape for automated pick-and-place assembly. The components themselves are identical; packaging choice depends on assembly process requirements.

Q: Why is the SN74F74D marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. The SN74F74DR remains in active production and is the recommended replacement for future orders and new designs.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the SN74F74D and SN74F74DR carry identical ROHS3 compliance, REACH unaffected status, and MSL Level 1 rating. No additional testing or qualification is required when transitioning from one part to the other.

Q: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (Small Outline Integrated Circuit) package is a surface mount package with 14 pins, 0.154 inches (3.90 mm) body width. This specification ensures mechanical and electrical compatibility with PCB footprints designed for either the SN74F74D or SN74F74DR.