DM74ALS74AN Equivalent & Substitute Parts

Part Overview

The DM74ALS74AN is a dual D-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 14-DIP package. This component functions as a 2-element D-type flip-flop with complementary outputs, set/preset and reset capabilities, and positive edge triggering. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

DM74ALS74AN

onsemiIn Stock: 1604DM74ALS74AN Datasheet

Current PartRFQ

SN74ALS74AN

Texas InstrumentsIn Stock: 4221SN74ALS74AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74ALS74AN is determined by strict equivalence across the following critical parameters:

• Logic Function: Dual D-type flip-flop with 2 elements, 1 bit per element, complementary outputs
• Trigger Mechanism: Positive edge triggering with set/preset and reset functionality
• Electrical Performance: Clock frequency of 34 MHz, propagation delay of 18 ns @ 5V with 50pF load
• Output Characteristics: Output current specifications of 400µA (high) and 8mA (low)
• Power Supply: 4.5V to 5.5V operating range with 4mA quiescent current
• Package Compatibility: 14-DIP (0.300", 7.62mm) through-hole mounting
• Temperature Range: 0°C to 70°C operating specification

The SN74ALS74AN from Texas Instruments meets all these criteria and is classified as an equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS74AN from Texas Instruments is the direct equivalent substitute for the obsolete DM74ALS74AN. All electrical, functional, and mechanical parameters are identical. The primary distinction is product status: the SN74ALS74AN is actively manufactured and supported, whereas the DM74ALS74AN is obsolete.

For new designs or component replacement in existing systems, the SN74ALS74AN is the appropriate selection. The Texas Instruments part carries RoHS3 compliance certification, providing additional regulatory alignment for modern manufacturing environments. Both parts maintain identical REACH and ECCN classifications.

The through-hole 14-DIP package format is consistent between both parts, ensuring direct mechanical compatibility in PCB layouts without redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS74AN directly replace the DM74ALS74AN in existing circuit boards?

A: Yes. The SN74ALS74AN is a direct pin-for-pin and functionally equivalent replacement. All electrical specifications, timing parameters, and package dimensions are identical. No circuit modifications are required.

Q: What is the primary reason for substitution?

A: The DM74ALS74AN is classified as obsolete. The SN74ALS74AN from Texas Instruments is actively manufactured and represents the current production equivalent within the 74ALS logic family.

Q: Are there any compliance differences between the two parts?

A: Both parts share identical REACH and ECCN classifications. The SN74ALS74AN carries RoHS3 compliance certification, which the obsolete DM74ALS74AN does not specify. This provides enhanced regulatory compliance for modern applications.

Q: Do the packaging specifications differ?

A: No. Both parts use the 14-DIP (0.300", 7.62mm) through-hole package format. Mechanical compatibility is complete.

Q: Are the electrical performance characteristics identical?

A: Yes. Clock frequency, propagation delay, output current specifications, supply voltage range, quiescent current, and operating temperature range are identical between both parts.

Q: What is the difference in product status?

A: The DM74ALS74AN is obsolete and no longer in active production. The SN74ALS74AN is actively manufactured by Texas Instruments, ensuring ongoing availability and supply chain continuity.