DM74ALS273WMX Equivalent & Substitute Parts

Part Overview

The DM74ALS273WMX is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit configuration and positive edge triggering. This component operates at a maximum clock frequency of 35 MHz with a propagation delay of 15ns at 5V with 50pF load. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

DM74ALS273WMX

onsemiIn Stock: 1309DM74ALS273WMX Datasheet

Current PartRFQ

SN74ALS273DW

Texas InstrumentsIn Stock: 2116SN74ALS273DW Datasheet

DirectRFQ

SN74ALS273DWR

Texas InstrumentsIn Stock: 3066SN74ALS273DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74ALS273WMX is determined by strict equivalence across the following critical parameters:

• Functional Architecture: D-Type flip-flop with 1 element, 8-bit configuration, and master reset function
• Electrical Performance: 35 MHz clock frequency, 15ns propagation delay at 5V with 50pF load, positive edge triggering
• Output Characteristics: Non-inverted output type with specified current ratings (2.6mA high, 24mA low)
• Power Supply: 4.5V to 5.5V operating range with 20 mA quiescent current
• Package Compatibility: 20-SOIC (0.295", 7.50mm Width) surface mount package
• Temperature Range: 0°C to 70°C operating temperature

The substitute parts SN74ALS273DW and SN74ALS273DWR, both manufactured by Texas Instruments, meet all specified electrical and mechanical parameters. Both parts share the identical 74ALS series base product number and maintain full functional and pin compatibility.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS273DWR (Texas Instruments) is the primary substitute for the obsolete DM74ALS273WMX. This part maintains active product status, ensuring long-term availability and supply chain stability. The SN74ALS273DWR is RoHS3 compliant and carries REACH Unaffected certification, meeting current regulatory requirements. Packaging is supplied in Cut Tape (CT) and Digi-Reel format with 3015 units currently in stock.

SN74ALS273DW (Texas Instruments) serves as a secondary substitute option. While functionally and electrically identical to the primary substitute, this part carries Last Time Buy status, indicating limited future availability. This variant is supplied in Tube packaging and is RoHS3 compliant with REACH Unaffected status. Current inventory stands at 2100 units.

Both Texas Instruments substitutes provide complete electrical and mechanical compatibility with the original onsemi part, with no design modifications required for direct replacement in existing applications.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS273DW and SN74ALS273DWR be used interchangeably with DM74ALS273WMX?

A: Yes. Both Texas Instruments parts are direct functional equivalents. All critical electrical parameters, including clock frequency, propagation delay, output current ratings, and supply voltage range, are identical. Pin configuration and package dimensions match exactly, enabling direct substitution without circuit modification.

Q: What is the difference between SN74ALS273DW and SN74ALS273DWR?

A: The primary differences are packaging format and product lifecycle status. SN74ALS273DW is supplied in Tube packaging and carries Last Time Buy status. SN74ALS273DWR is supplied in Cut Tape (CT) and Digi-Reel format and maintains Active product status. Electrically and functionally, both parts are identical.

Q: Why is the original DM74ALS273WMX classified as obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production and support for this part. Texas Instruments continues to manufacture functionally equivalent 74ALS273 variants, providing continuity for applications requiring this logic function.

Q: Are there any compliance or regulatory differences between the original and substitute parts?

A: The original DM74ALS273WMX carries REACH Unaffected status. Both Texas Instruments substitutes are RoHS3 compliant and REACH Unaffected, meeting current environmental and regulatory standards. All three parts have Moisture Sensitivity Level 1 (Unlimited).

Q: What packaging options are available for the substitute parts?

A: SN74ALS273DW is available in Tube packaging. SN74ALS273DWR is available in Cut Tape (CT) and Digi-Reel format. Both use the identical 20-SOIC (0.295", 7.50mm Width) surface mount package, ensuring mechanical compatibility with existing PCB designs.

Q: Can I mix SN74ALS273DW and SN74ALS273DWR in the same production run?

A: Yes. Both parts are electrically and functionally identical with matching pin configurations and package dimensions. Mixing is permissible from a technical standpoint, though procurement and inventory management practices may differ based on packaging format and supplier requirements.