DM74AS574N Equivalent & Substitute Parts

Part Overview

The DM74AS574N is a logic integrated circuit functioning as a D-Type flip-flop with 1 element and 8-bit capacity. Manufactured by onsemi, this component features tri-state, non-inverted output and operates at positive edge trigger. The part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

DM74AS574N

onsemiIn Stock: 1128DM74AS574N Datasheet

Current PartRFQ

SN74AS574N

Texas InstrumentsIn Stock: 3112SN74AS574N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74AS574N is determined by strict equivalence across the following critical parameters:

• Series designation (74AS)
• Functional type (D-Type flip-flop)
• Element and bit configuration (1 element, 8-bit)
• Output characteristics (tri-state, non-inverted)
• Trigger mechanism (positive edge)
• Electrical specifications (voltage supply, propagation delay, output current)
• Physical package (20-DIP, 0.300" pitch, 7.62mm)
• Mounting technology (through-hole)

The SN74AS574N manufactured by Texas Instruments meets all these criteria and qualifies as a direct substitute. Both parts share identical functional architecture, electrical performance within specified tolerances, and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS574N from Texas Instruments is the direct equivalent for the obsolete DM74AS574N. Selection of the Texas Instruments part provides the following advantages:

• Active product status ensures ongoing availability and manufacturing support
• ROHS3 compliance satisfies current environmental and regulatory requirements
• Identical electrical and mechanical specifications guarantee pin-for-pin compatibility
• Higher clock frequency rating (90 MHz vs. 80 MHz) provides additional performance margin
• Equivalent propagation delay and output current characteristics maintain circuit timing and drive requirements

For applications requiring the DM74AS574N, the SN74AS574N serves as the recommended replacement without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS574N replace the DM74AS574N in existing designs?

A: Yes. Both parts are 20-DIP through-hole packages with identical pin configurations, electrical specifications, and functional characteristics. Direct substitution is possible without circuit redesign.

Q: What is the significance of the higher clock frequency in the SN74AS574N?

A: The SN74AS574N is rated for 90 MHz operation compared to 80 MHz for the DM74AS574N. This represents a performance specification difference; both parts operate identically at the same clock frequencies within their respective ratings.

Q: Are there packaging differences between these parts?

A: No. Both the DM74AS574N and SN74AS574N use identical 20-DIP (0.300", 7.62mm) through-hole packaging. Physical and mechanical compatibility is complete.

Q: Why is the DM74AS574N classified as obsolete?

A: Obsolescence reflects the manufacturer's discontinuation of the part. The SN74AS574N, maintained as an active product by Texas Instruments, provides functional continuity for applications requiring 74AS series D-Type flip-flop logic.

Q: What compliance certifications apply to the SN74AS574N?

A: The SN74AS574N is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and use.