SN74ACT74D Equivalent & Substitute Parts

Part Overview

The SN74ACT74D is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments 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 SN74ACT74D is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SN74ACT74D

Texas InstrumentsIn Stock: 3013SN74ACT74D Datasheet

Current PartRFQ

SN74ACT74DR

Texas InstrumentsIn Stock: 2228SN74ACT74DR Datasheet

DirectRFQ

MC74ACT74DR2G

onsemiIn Stock: 6226MC74ACT74DR2G Datasheet

DirectRFQ

MC74ACT74DG

onsemiIn Stock: 2049MC74ACT74DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ACT74D is determined by strict equivalence across the following critical parameters:

• Functional Type: D-Type flip-flop with 2 elements, 1 bit per element, complementary outputs, set/preset and reset functions
• Trigger Mechanism: Positive edge triggering
• Package: 14-SOIC (0.154", 3.90mm Width) surface mount
• Electrical Specifications: Supply voltage range 4.5V ~ 5.5V, operating temperature -40°C ~ 85°C
• Series Designation: 74ACT logic family
• Compliance: ROHS3 compliant, MSL 1 rating

Substitute parts must maintain identical functional characteristics, package form factor, and electrical operating ranges. Variations in propagation delay, quiescent current, and input capacitance are permitted within the 74ACT logic family specification tolerances.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT74DR (Texas Instruments) is the primary direct substitute for the discontinued SN74ACT74D. Both parts are manufactured by Texas Instruments, share identical electrical specifications including 7.5 ns propagation delay and 2 µA quiescent current, and maintain the same 14-SOIC package footprint. The SN74ACT74DR is currently in active production status and available in Cut Tape and Digi-Reel packaging formats.

MC74ACT74DR2G (onsemi) and MC74ACT74DG (onsemi) are functionally equivalent cross-manufacturer substitutes. Both onsemi parts maintain the same 14-SOIC package, supply voltage range, output current ratings, and operating temperature specifications. The onsemi variants exhibit slightly higher propagation delay (11 ns versus 7.5 ns) and increased quiescent current (4 µA versus 2 µA), which remain within acceptable 74ACT logic family tolerances for most applications. Both onsemi parts are in active production and ROHS3 compliant.

All substitute parts maintain identical pin configuration, functional behavior, and mechanical compatibility with the original SN74ACT74D design.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT74DR be used as a direct replacement for the SN74ACT74D?

A: Yes. The SN74ACT74DR is a direct substitute manufactured by Texas Instruments with identical electrical specifications, package form factor, and functional characteristics. Both parts are 14-SOIC surface mount devices with 210 MHz clock frequency, 7.5 ns propagation delay at 5V/50pF, and 2 µA quiescent current.

Q: What is the difference between the Texas Instruments SN74ACT74DR and the onsemi MC74ACT74DR2G?

A: Both parts are functionally equivalent D-type flip-flops in 14-SOIC packages with identical pin configurations and supply voltage ranges. The primary differences are manufacturer origin and minor electrical parameter variations. The onsemi MC74ACT74DR2G exhibits 11 ns propagation delay and 4 µA quiescent current compared to the TI part's 7.5 ns and 2 µA specifications. These variations fall within 74ACT logic family tolerances.

Q: Are the onsemi MC74ACT74DG and MC74ACT74DR2G interchangeable?

A: Yes. Both onsemi parts are functionally equivalent with identical electrical specifications, package type (14-SOIC), and operating characteristics. The primary difference is packaging format: MC74ACT74DG is supplied in Tube packaging, while MC74ACT74DR2G is supplied in Tape & Reel format.

Q: Does the higher propagation delay of the onsemi parts affect circuit performance?

A: The onsemi variants specify 11 ns propagation delay compared to 7.5 ns for the Texas Instruments parts. This 4.6 ns difference remains within 74ACT logic family specifications and is acceptable for most digital logic applications operating at or below 210 MHz clock frequencies.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The SN74ACT74DR, MC74ACT74DR2G, and MC74ACT74DG are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, matching the original SN74ACT74D specifications.

Q: What packaging options are available for these substitute parts?

A: SN74ACT74DR is available in Cut Tape and Digi-Reel formats. MC74ACT74DR2G is supplied in Tape & Reel packaging. MC74ACT74DG is supplied in Tube packaging. All parts use identical 14-SOIC (0.154", 3.90mm Width) surface mount packages.