DM74AS74N Equivalent & Substitute Parts

Part Overview

The DM74AS74N is a dual D-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 14-DIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The DM74AS74N 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 synchronous state storage.

Substiute Parts

DM74AS74N

onsemiIn Stock: 1549DM74AS74N Datasheet

Current PartRFQ

SN74AS74AN

Burr BrownIn Stock: 3328SN74AS74AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74AS74N are identified based on strict electrical and mechanical parameter matching within the 74AS logic family. The following parameters define substitution eligibility:

• Series classification: 74AS
• Functional type: Dual D-type flip-flop with complementary outputs
• Number of elements: 2
• Bits per element: 1
• Trigger mechanism: Positive edge
• Clock frequency: 105 MHz
• Propagation delay: 9 ns @ 5V, 50pF
• Supply voltage range: 4.5V ~ 5.5V
• Output current specifications: 2mA (high), 20mA (low)
• Quiescent current: 16 mA
• Operating temperature range: 0°C ~ 70°C
• Package type: 14-DIP (0.300", 7.62mm)
• Mounting configuration: Through hole

Parts meeting all these criteria are electrically and mechanically interchangeable for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS74AN serves as a direct electrical and mechanical substitute for the DM74AS74N. Both components share identical functional specifications, electrical performance characteristics, and physical packaging. The primary distinction is product status: the DM74AS74N is obsolete while the SN74AS74AN maintains active production status through Burr Brown.

For new designs or ongoing procurement requirements, the SN74AS74AN is the recommended selection due to its active availability and continued manufacturing support. Both parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, confirming regulatory equivalence for export and trade purposes.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS74AN replace the DM74AS74N in existing circuit designs?

A: Yes. The SN74AS74AN is a direct substitute. All electrical parameters, timing specifications, output characteristics, and physical package dimensions are identical. No circuit modifications are required for substitution.

Q: Are there any differences in pin configuration between these parts?

A: No. Both the DM74AS74N and SN74AS74AN use the 14-DIP (0.300", 7.62mm) package with identical pin assignments. Through-hole mounting compatibility is maintained.

Q: Why is the DM74AS74N listed as obsolete?

A: Obsolete status indicates that onsemi has discontinued manufacturing this part number. The SN74AS74AN, maintained in active production by Burr Brown, provides continued access to equivalent 74AS dual D-type flip-flop functionality.

Q: What are the key parameters that define substitution eligibility?

A: Substitution is based on matching the 74AS series classification, dual D-type flip-flop configuration, 105 MHz clock frequency, 9 ns propagation delay, 4.5V–5.5V supply range, complementary output type, positive edge triggering, and 14-DIP package specification.

Q: Are there supply voltage or temperature operating range differences?

A: No. Both parts operate across the identical 4.5V–5.5V supply range and 0°C–70°C temperature range. Output current specifications (2mA high, 20mA low) and quiescent current (16 mA) are also identical.

Q: What is the inventory status of these parts?

A: The DM74AS74N has 1,448 pieces in stock (new original). The SN74AS74AN has 3,302 pieces in stock (new original, bulk packaging). The SN74AS74AN offers greater availability for procurement planning.