DM74AS74SJ Equivalent & Substitute Parts

Part Overview

The DM74AS74SJ is a dual D-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 14-SOIC surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates as a 2-element D-type flip-flop with complementary outputs, positive edge triggering, and a maximum clock frequency of 105 MHz, suitable for digital logic applications requiring edge-triggered storage and state management.

Substiute Parts

DM74AS74SJ

onsemiIn Stock: 1157DM74AS74SJ Datasheet

Current PartRFQ

SN74AS74ANSR

Texas InstrumentsIn Stock: 3713SN74AS74ANSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74AS74SJ is determined by strict equivalence across the following critical parameters:

• Functional Architecture: Dual D-type flip-flop with 2 elements, 1 bit per element, complementary outputs, and positive edge triggering
• Electrical Performance: Clock frequency of 105 MHz, propagation delay of 9 ns @ 5V with 50pF load, output drive capability of 2mA high and 20mA low
• Power Supply: 4.5V to 5.5V operating range with 16 mA quiescent current
• Package Compatibility: 14-SOIC (0.209", 5.30mm Width) surface mount package
• Operating Temperature Range: 0°C to 70°C

The SN74AS74ANSR from Texas Instruments meets all these criteria and is classified as an active product, providing direct functional and electrical equivalence with improved availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS74ANSR from Texas Instruments is the direct equivalent substitute for the DM74AS74SJ. Both parts are identical in electrical performance, functional architecture, and package specification. The primary advantage of the SN74AS74ANSR is its active product status, ensuring continued availability and manufacturing support. Additionally, the SN74AS74ANSR carries ROHS3 compliance certification, meeting modern regulatory requirements for hazardous substance restrictions. The DM74AS74SJ's obsolete status necessitates transition to the SN74AS74ANSR for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS74ANSR directly replace the DM74AS74SJ without circuit modifications?

A: Yes. The SN74AS74ANSR is electrically and functionally identical to the DM74AS74SJ across all specified parameters, including clock frequency, propagation delay, output drive capability, supply voltage range, and operating temperature. The 14-SOIC package dimensions are identical, enabling direct PCB-level substitution.

Q: What is the difference between the DM74AS74SJ and SN74AS74ANSR packaging?

A: Both parts use the 14-SOIC (0.209", 5.30mm Width) surface mount package. The DM74AS74SJ is supplied in standard packaging, while the SN74AS74ANSR is available in Tape & Reel (TR) format, which is standard for high-volume production environments.

Q: Why is the DM74AS74SJ classified as obsolete?

A: The DM74AS74SJ has been discontinued by onsemi. The SN74AS74ANSR from Texas Instruments remains in active production and is the recommended replacement for ongoing design support and manufacturing.

Q: Are there any compliance differences between these parts?

A: The SN74AS74ANSR is ROHS3 compliant, meeting current environmental and hazardous substance regulations. Both parts are REACH unaffected and carry the same EAR99 export classification.

Q: What is the quiescent current specification, and does it affect substitution?

A: Both parts have identical quiescent current specifications of 16 mA. This parameter does not differentiate the parts and does not impact substitution decisions.