DM74ALS534N Equivalent & Substitute Parts

Part Overview

The DM74ALS534N is a logic integrated circuit functioning as a Flip Flop 1 Element D-Type 8 Bit with positive edge triggering in a 20-DIP package. This component belongs to the 74ALS series and is classified as obsolete by the original manufacturer (onsemi). Due to its obsolete status and limited availability from the original source, identifying active equivalent parts is essential for design continuity and procurement reliability.

Substiute Parts

DM74ALS534N

onsemiIn Stock: 1133DM74ALS534N Datasheet

Current PartRFQ

SN74ALS534AN

Texas InstrumentsIn Stock: 1936SN74ALS534AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74ALS534N is determined by strict equivalence across the following critical parameters:

• Logic Function: D-Type Flip Flop with 1 element and 8 bits per element
• Output Configuration: Tri-State, Inverted output type
• Electrical Performance: 35 MHz clock frequency, 16 ns maximum propagation delay at 5V with 50pF load
• Trigger Mechanism: Positive edge triggering
• Power Supply: 4.5V to 5.5V operating range
• Quiescent Current: 19 mA
• Temperature Range: 0°C to 70°C
• Package Specification: 20-DIP (0.300", 7.62mm) through-hole mounting

The SN74ALS534AN from Texas Instruments meets all these parameters identically, establishing it as a direct functional and electrical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS534AN from Texas Instruments is the direct equivalent for the obsolete DM74ALS534N. Selection of the Texas Instruments part is supported by the following factors:

• Active Product Status: The SN74ALS534AN maintains active production status, ensuring long-term availability and supply chain reliability.
• Regulatory Compliance: The SN74ALS534AN is ROHS3 compliant, meeting current environmental and regulatory requirements.
• Identical Electrical Specifications: All functional, electrical, and timing parameters are identical to the original part.
• Package Compatibility: Both parts use the same 20-DIP through-hole package, enabling direct board-level substitution without layout modifications.
• Environmental Compliance: Both parts maintain REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS534AN be used as a direct replacement for the DM74ALS534N?

A: Yes. The SN74ALS534AN is electrically and functionally identical to the DM74ALS534N across all specified parameters, including logic function, timing characteristics, power supply requirements, and package configuration. Direct substitution is supported without circuit modifications.

Q: Are there any package or pinout differences between these parts?

A: No. Both the DM74ALS534N and SN74ALS534AN use the identical 20-DIP (0.300", 7.62mm) through-hole package with the same pinout. Board-level compatibility is complete.

Q: What is the significance of the DM74ALS534N being obsolete?

A: Obsolete status indicates that the original manufacturer (onsemi) has discontinued production. This creates supply constraints and potential long-term availability issues. The active SN74ALS534AN from Texas Instruments provides a reliable alternative with assured continued availability.

Q: Does the ROHS3 compliance of the SN74ALS534AN affect compatibility?

A: No. ROHS3 compliance is a regulatory advantage that ensures the part meets current environmental standards. It does not affect electrical performance or compatibility with existing designs.

Q: Are the quiescent current and output drive characteristics identical?

A: Yes. Both parts specify identical quiescent current (19 mA) and output drive characteristics (2.6 mA high, 24 mA low), ensuring equivalent power consumption and signal integrity in the circuit.