DM74AS280N Equivalent & Substitute Parts

Part Overview

The DM74AS280N is a 9-bit parity generator/checker logic integrated circuit manufactured by onsemi in a 14-DIP through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance, repairs, and legacy design support. The part operates within standard TTL voltage and temperature ranges, with electrical characteristics suitable for digital logic applications requiring parity generation and checking functions.

Substiute Parts

DM74AS280N

onsemiIn Stock: 2331DM74AS280N Datasheet

Current PartRFQ

SN74AS280N

Texas InstrumentsIn Stock: 3758SN74AS280N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74AS280N are qualified based on the following critical parameters that ensure functional and mechanical compatibility:

• Logic Type: Parity Generator/Checker (9-Bit)
• Series Classification: 74AS
• Voltage Supply Range: 4.5 V ~ 5.5 V
• Output Current Specifications: 2mA (high), 20mA (low)
• Operating Temperature Range: 0°C ~ 70°C
• Package Type: 14-DIP through-hole configuration
• Physical Dimensions: 0.300" (7.62mm) pitch

The SN74AS280N from Texas Instruments meets all electrical and mechanical parameters required for direct substitution. Both parts share identical logic functionality, pin configuration, and electrical performance characteristics within the specified operating conditions.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS280N from Texas Instruments is the qualified substitute for the obsolete DM74AS280N. Selection is based on:

• Product Status Alignment: The SN74AS280N maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete DM74AS280N.
• Regulatory Compliance: Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99), ensuring no additional compliance burden in substitution.
• Electrical Equivalence: Identical voltage supply range, output current specifications, and operating temperature range guarantee functional compatibility in existing circuit designs.
• Mechanical Compatibility: Both parts utilize the same 14-DIP through-hole package with 0.300" (7.62mm) pitch, allowing direct socket replacement without PCB modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS280N be used as a direct replacement for the DM74AS280N?

A: Yes. The SN74AS280N is electrically and mechanically equivalent to the DM74AS280N. Both parts share identical logic functionality, pin configuration, voltage specifications, output current ratings, and operating temperature range. Direct socket substitution is possible without circuit modification.

Q: What is the primary reason for substituting the DM74AS280N?

A: The DM74AS280N is classified as obsolete. The SN74AS280N from Texas Instruments is an active product with ongoing manufacturing and supply availability, making it the appropriate choice for new designs, repairs, and system maintenance.

Q: Are there any package differences between these parts?

A: No. Both the DM74AS280N and SN74AS280N use the 14-DIP through-hole package with identical 0.300" (7.62mm) pitch specifications. Physical dimensions and pin spacing are identical, enabling direct PCB compatibility.

Q: Do these parts have different compliance or regulatory requirements?

A: No. Both parts maintain identical REACH and ECCN classifications. Substitution introduces no additional regulatory or compliance considerations.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: 9-bit parity generator/checker logic type, 4.5 V to 5.5 V supply voltage range, 2mA high and 20mA low output current specifications, 0°C to 70°C operating temperature range, and 14-DIP through-hole package configuration.