SN74ACT74DRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT74DRG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments in a 14-SOIC surface mount package. This device implements two independent D-type flip-flops with Set (Preset) and Reset functions, operating at a maximum clock frequency of 210 MHz with complementary outputs. The SN74ACT74DRG4 is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SN74ACT74DRG4

Texas InstrumentsIn Stock: 4072SN74ACT74DRG4 Datasheet

Current PartRFQ

SN74ACT74DR

Texas InstrumentsIn Stock: 2228SN74ACT74DR Datasheet

MFR RecommendedRFQ

MC74ACT74DR2G

onsemiIn Stock: 6226MC74ACT74DR2G Datasheet

DirectRFQ

MC74ACT74DG

onsemiIn Stock: 2049MC74ACT74DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ACT74DRG4 are qualified based on the following criteria:

Electrical Compatibility: All substitute parts maintain identical functional specifications including dual D-type flip-flop architecture, 210 MHz clock frequency, 4.5V to 5.5V supply voltage range, -40°C to 85°C operating temperature, and complementary output configuration.

Mechanical Compatibility: All substitute parts use the 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring direct pin-for-pin compatibility and identical PCB footprint requirements.

Regulatory Compliance: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity level (MSL 1 - Unlimited), ensuring equivalent environmental and regulatory qualification.

Key Differentiators: Substitutes vary by manufacturer (Texas Instruments or onsemi), product status (Active vs. Obsolete), packaging format (Cut Tape, Tape & Reel, or Tube), and minor variations in propagation delay and quiescent current specifications within acceptable operating parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - SN74ACT74DR (Texas Instruments): This part is the direct Texas Instruments equivalent with Active product status, ensuring long-term availability and manufacturing support. It offers improved propagation delay performance (7.5ns vs. 11ns) while maintaining identical electrical and mechanical specifications. Recommended for new designs and production transitions from the obsolete SN74ACT74DRG4.

Alternative - MC74ACT74DR2G (onsemi): This onsemi equivalent maintains Active product status with identical propagation delay and quiescent current specifications to the original part. Tape & Reel packaging supports high-volume production requirements. Suitable for applications where onsemi qualification is acceptable and supply chain diversification is beneficial.

Alternative - MC74ACT74DG (onsemi): This onsemi equivalent provides Active product status with identical electrical performance. Tube packaging format supports lower-volume or prototype applications. Appropriate for designs where onsemi sourcing is preferred or required.

All substitute parts maintain full electrical and mechanical compatibility with the SN74ACT74DRG4, with no design modifications required for direct substitution in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT74DR be used as a direct replacement for the SN74ACT74DRG4?

A: Yes. Both parts share identical pin configuration, 14-SOIC package dimensions, electrical specifications (supply voltage, operating temperature, clock frequency, output drive capability), and functional architecture. The SN74ACT74DR is the active production equivalent with improved propagation delay performance.

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

A: Both manufacturers produce functionally equivalent 74ACT74 logic devices with identical package and pin assignments. Differences are limited to manufacturer-specific quiescent current (2 µA vs. 4 µA) and input capacitance (3 pF vs. 4.5 pF) specifications, which remain within acceptable operating parameters for standard logic applications. Selection depends on supply chain availability, qualification requirements, and packaging format needs.

Q: Does packaging format affect electrical performance?

A: No. The packaging format (Cut Tape, Tape & Reel, Tube, or Digi-Reel) affects only procurement, handling, and assembly processes. Electrical and functional performance is identical across all packaging formats for the same part number base.

Q: Are all substitutes RoHS compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity level (MSL 1), ensuring equivalent environmental qualification and regulatory acceptance.

Q: What is the propagation delay difference between SN74ACT74DR and the other substitutes?

A: The SN74ACT74DR specifies 7.5ns maximum propagation delay at 5V with 50pF load, compared to 11ns for the SN74ACT74DRG4, MC74ACT74DR2G, and MC74ACT74DG. This 4.6ns improvement represents enhanced performance within the same 210 MHz clock frequency specification and does not affect compatibility or substitution suitability.