DM74ALS74AMX Equivalent & Substitute Parts

Part Overview

The DM74ALS74AMX 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 equivalent and substitute parts necessary for ongoing design support and production continuity. The device provides two independent D-type flip-flops with set and reset functionality, complementary outputs, and positive edge triggering suitable for digital logic applications requiring state storage and synchronization.

Substiute Parts

DM74ALS74AMX

onsemiIn Stock: 2491DM74ALS74AMX Datasheet

Current PartRFQ

SN74ALS74AD

Texas InstrumentsIn Stock: 2060SN74ALS74AD Datasheet

DirectRFQ

SN74ALS74ADR

Texas InstrumentsIn Stock: 3758SN74ALS74ADR Datasheet

DirectRFQ

SN74ALS74ANSR

Texas InstrumentsIn Stock: 2575SN74ALS74ANSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74ALS74AMX is determined by strict electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Series designation (74ALS)
• Functional type (D-Type Flip-Flop, dual element, 1-bit per element)
• Output configuration (Complementary)
• Trigger mechanism (Positive Edge)
• Clock frequency (34 MHz)
• Propagation delay (18 ns @ 5V, 50pF)
• Supply voltage range (4.5V ~ 5.5V)
• Output current specifications (400µA, 8mA)
• Quiescent current (4 mA)
• Operating temperature range (0°C ~ 70°C)

Mechanical Compatibility Criteria:

• Package type (14-SOIC)
• Pin count and configuration
• Mounting type (Surface Mount)

Substitute parts are classified into two categories:

Direct Substitutes: Parts that match all electrical and mechanical parameters with identical package dimensions (0.154", 3.90mm Width).

Similar Substitutes: Parts that match all electrical parameters but feature alternative package dimensions (0.209", 5.30mm Width), requiring PCB layout verification before implementation.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74ALS74ADR

The SN74ALS74ADR from Texas Instruments is the preferred substitute for the obsolete DM74ALS74AMX. This part maintains complete electrical and mechanical compatibility with identical package dimensions (14-SOIC, 0.154", 3.90mm Width). The SN74ALS74ADR carries Active product status, ensuring long-term availability and supply chain stability. ROHS3 compliance and REACH unaffected status satisfy modern regulatory requirements. Tape & Reel packaging supports high-volume production workflows.

Secondary Recommendation: SN74ALS74AD

The SN74ALS74AD provides direct electrical and mechanical equivalence with identical package dimensions. This part is classified as Last Time Buy, indicating limited future availability. Selection of this part should be reserved for applications where existing inventory or specific packaging requirements (Tube) justify the procurement decision.

Alternative Consideration: SN74ALS74ANSR

The SN74ALS74ANSR maintains complete electrical compatibility but features a wider package body (14-SOIC, 0.209", 5.30mm Width) compared to the original DM74ALS74AMX (0.154", 3.90mm Width). This dimensional difference requires PCB layout modification and footprint adjustment. Selection is appropriate only when PCB redesign is feasible and the wider package accommodates board layout constraints. Active product status and ROHS3 compliance support long-term production use.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS74ADR be used as a direct replacement for DM74ALS74AMX without PCB modification?

A: Yes. The SN74ALS74ADR is electrically and mechanically identical to the DM74ALS74AMX, with matching package dimensions (14-SOIC, 0.154", 3.90mm Width). No PCB layout changes are required for direct substitution.

Q: What is the key difference between SN74ALS74ADR and SN74ALS74ANSR?

A: Both parts are electrically identical. The primary difference is package body width: SN74ALS74ADR measures 0.154" (3.90mm), while SN74ALS74ANSR measures 0.209" (5.30mm). The wider package of the ANSR variant requires PCB footprint modification and may affect board layout.

Q: Why is the DM74ALS74AMX classified as obsolete?

A: The DM74ALS74AMX has reached end-of-life status from onsemi. Substitute parts from active manufacturers such as Texas Instruments ensure continued design support and production availability.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitute parts (SN74ALS74AD, SN74ALS74ADR, SN74ALS74ANSR) are ROHS3 compliant, meeting current environmental and regulatory standards.

Q: What packaging options are available for substitute parts?

A: SN74ALS74AD is supplied in Tube packaging. SN74ALS74ADR and SN74ALS74ANSR are supplied in Tape & Reel format, suitable for automated assembly processes.

Q: Do all substitute parts support the same operating temperature range?

A: Yes. All substitute parts operate across the identical temperature range of 0°C to 70°C (TA), matching the original DM74ALS74AMX specification.