DM74ALS273N Equivalent & Substitute Parts

Part Overview

The DM74ALS273N is a D-Type flip-flop logic integrated circuit featuring 1 element with 8-bit configuration and positive edge triggering. Manufactured by onsemi, this component operates at a maximum clock frequency of 35 MHz with a propagation delay of 15ns at 5V with 50pF load. The device is housed in a 20-DIP (0.300", 7.62mm) through-hole package and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for ongoing system support and new design implementations.

Substiute Parts

DM74ALS273N

onsemiIn Stock: 1295DM74ALS273N Datasheet

Current PartRFQ

SN74ALS273N

Texas InstrumentsIn Stock: 2578SN74ALS273N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74ALS273N is determined by strict equivalence across the following electrical and mechanical parameters:

• Functional equivalence: D-Type flip-flop with 1 element, 8-bit configuration, and master reset function
• Electrical performance: Clock frequency of 35 MHz, propagation delay of 15ns @ 5V with 50pF load, positive edge triggering, non-inverted output
• Electrical characteristics: Output currents (2.6mA high, 24mA low), supply voltage range (4.5V ~ 5.5V), quiescent current (20 mA)
• Operating conditions: Temperature range 0°C ~ 70°C
• Mechanical compatibility: 20-DIP (0.300", 7.62mm) through-hole package
• Series compatibility: 74ALS logic family

The SN74ALS273N from Texas Instruments meets all these criteria and is classified as an active product, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS273N from Texas Instruments is the direct equivalent for the obsolete DM74ALS273N. Both components share identical electrical specifications, functional characteristics, and package dimensions. The SN74ALS273N is currently in active production status, ensuring long-term availability and supply chain continuity.

The SN74ALS273N carries ROHS3 compliance certification, meeting current environmental and regulatory requirements. Both parts maintain REACH Unaffected status. For applications requiring new component procurement or system redesign, the SN74ALS273N is the appropriate selection based on product status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS273N directly replace the DM74ALS273N in existing designs?

A: Yes. Both components are electrically and mechanically identical across all specified parameters, including clock frequency, propagation delay, output characteristics, supply voltage, and package configuration. Direct pin-for-pin substitution is supported.

Q: Are there differences in packaging between these parts?

A: Both parts use the 20-DIP (0.300", 7.62mm) through-hole package. The DM74ALS273N is supplied without specified packaging detail, while the SN74ALS273N is supplied in tube packaging. The physical package dimensions and pin configuration are identical.

Q: What is the significance of the product status difference?

A: The DM74ALS273N is classified as obsolete, indicating onsemi has discontinued production. The SN74ALS273N is active, meaning Texas Instruments continues manufacturing and supporting this component. For new designs and ongoing supply requirements, the active SN74ALS273N is the appropriate choice.

Q: Do compliance certifications differ between these parts?

A: The SN74ALS273N is ROHS3 compliant, meeting current environmental regulations. Both parts maintain REACH Unaffected status. For applications subject to environmental compliance requirements, the SN74ALS273N satisfies current regulatory standards.

Q: Are the electrical performance characteristics identical?

A: Yes. Both components operate at 35 MHz clock frequency with 15ns propagation delay at 5V with 50pF load. Output currents, supply voltage range, quiescent current, and operating temperature range are identical across both parts.