DM74ALS74AM Equivalent & Substitute Parts

Part Overview

The DM74ALS74AM 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 substitute parts necessary for ongoing design support and procurement. The DM74ALS74AM provides two independent D-type flip-flops with complementary outputs, set/preset and reset functionality, and positive edge triggering suitable for digital logic applications requiring state storage and synchronization.

Substiute Parts

DM74ALS74AM

onsemiIn Stock: 1669DM74ALS74AM 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

Substitute parts for the DM74ALS74AM are identified based on strict electrical and mechanical parameter matching within the 74ALS logic family. The substitution criteria are:

Critical Parameters for Substitution:

• Series: 74ALS (identical logic family)
• Type: D-Type Flip-Flop (identical function)
• Number of Elements: 2 (identical configuration)
• Number of Bits per Element: 1 (identical configuration)
• Output Type: Complementary (identical output structure)
• Clock Frequency: 34 MHz (identical timing specification)
• Max Propagation Delay: 18 ns @ 5V, 50pF (identical timing performance)
• Trigger Type: Positive Edge (identical triggering behavior)
• Voltage Supply: 4.5V ~ 5.5V (identical supply range)
• Current Specifications: 400µA, 8mA output; 4 mA quiescent (identical current ratings)
• Operating Temperature: 0°C ~ 70°C (identical temperature range)
• Mounting Type: Surface Mount (identical mounting)

Substitution Categories:

Direct Substitutes (Identical Package):

• SN74ALS74AD (Texas Instruments, 14-SOIC 0.154" width)
• SN74ALS74ADR (Texas Instruments, 14-SOIC 0.154" width)

Similar Substitute (Package Variant):

• SN74ALS74ANSR (Texas Instruments, 14-SO 0.209" width) — wider package footprint, same electrical specifications

Parameter Comparison

Engineering Selection Recommendations

SN74ALS74ADR (Recommended Primary Substitute)

The SN74ALS74ADR is the preferred substitute for the obsolete DM74ALS74AM. This part maintains identical electrical specifications and package dimensions (14-SOIC 0.154" width), ensuring direct pin-compatible replacement without PCB redesign. The SN74ALS74ADR carries Active product status from Texas Instruments, providing long-term availability and supply chain stability. ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1) meet modern environmental and reliability standards.

SN74ALS74AD (Secondary Substitute)

The SN74ALS74AD provides equivalent electrical performance and identical package specifications. This part is classified as Last Time Buy, indicating limited future availability. Selection of this part should be considered only when SN74ALS74ADR inventory is unavailable and immediate procurement is required.

SN74ALS74ANSR (Package Variant Substitute)

The SN74ALS74ANSR maintains all electrical specifications but uses a wider 14-SO package (0.209" width) compared to the standard 14-SOIC (0.154" width). This part is suitable only for designs where PCB layout can accommodate the larger package footprint. Active product status ensures availability. Selection requires PCB redesign to accommodate the wider package dimensions.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS74ADR replace DM74ALS74AM directly on the PCB?

A: Yes. The SN74ALS74ADR is pin-compatible and uses the identical 14-SOIC (0.154", 3.90mm width) package. No PCB modifications are required for direct substitution.

Q: What is the difference between SN74ALS74AD and SN74ALS74ADR?

A: Both parts are electrically identical with matching specifications and package dimensions. The primary difference is packaging format: SN74ALS74AD is supplied in Tube packaging, while SN74ALS74ADR is supplied in Tape & Reel (TR) format. SN74ALS74ADR has Active product status, while SN74ALS74AD is Last Time Buy.

Q: Can SN74ALS74ANSR be used as a direct replacement?

A: SN74ALS74ANSR is electrically equivalent but uses a wider 14-SO package (0.209" width) instead of the standard 14-SOIC (0.154" width). PCB layout modifications are required to accommodate the larger package footprint. This part is suitable only for new designs or redesigns where the wider package can be accommodated.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitute parts (SN74ALS74AD, SN74ALS74ADR, SN74ALS74ANSR) are ROHS3 compliant. The original DM74ALS74AM RoHS status was not specified in the provided data.

Q: What is the product status significance for these parts?

A: SN74ALS74ADR (Active) is the most reliable choice for new designs and long-term production, with guaranteed ongoing availability. SN74ALS74AD (Last Time Buy) has limited future availability and should be used only when SN74ALS74ADR is unavailable. The original DM74ALS74AM (Obsolete) is no longer manufactured.

Q: Do all substitute parts have the same electrical performance?

A: Yes. All substitute parts maintain identical clock frequency (34 MHz), propagation delay (18 ns @ 5V, 50pF), voltage supply range (4.5V ~ 5.5V), output current specifications (400µA, 8mA), quiescent current (4 mA), and operating temperature range (0°C ~ 70°C).