DM74ALS273WM Equivalent & Substitute Parts

Part Overview

The DM74ALS273WM is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity 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 device is packaged in a 20-SOIC surface mount configuration and is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

DM74ALS273WM

onsemiIn Stock: 1408DM74ALS273WM 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 DM74ALS273WM is determined by strict equivalence across the following electrical and mechanical parameters:

• Functional Identity: D-Type flip-flop with 1 element, 8-bit configuration, and master reset capability
• Electrical Performance: Clock frequency of 35 MHz, propagation delay of 15ns at 5V with 50pF load, positive edge triggering, and non-inverted output
• Power Characteristics: Supply voltage range 4.5V ~ 5.5V, output current specifications (2.6mA high, 24mA low), and quiescent current of 20 mA
• Package Compatibility: 20-SOIC surface mount package with identical physical dimensions (0.295", 7.50mm width)
• Environmental Specifications: Operating temperature range 0°C ~ 70°C and MSL rating of 1

All identified substitute parts meet these criteria without exception.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS273DWR (Texas Instruments) is the primary substitute for new designs and production. This part carries an Active product status, ensuring long-term availability and supply chain stability. It is RoHS3 compliant and available in Cut Tape and Digi-Reel packaging formats, supporting both prototype and high-volume manufacturing workflows. Current inventory of 3015 units supports immediate procurement requirements.

SN74ALS273DW (Texas Instruments) serves as a secondary substitute option. Although classified as Last Time Buy, this part maintains full electrical and mechanical equivalence to the DM74ALS273WM. It is RoHS3 compliant with 2100 units in stock, suitable for applications where tube packaging is acceptable.

Both Texas Instruments alternatives provide identical electrical performance and package compatibility, enabling direct substitution without circuit redesign or board layout modification.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS273DWR and SN74ALS273DW be used interchangeably with DM74ALS273WM?

A: Yes. Both parts meet all electrical and mechanical specifications of the DM74ALS273WM. The primary difference is packaging format: SN74ALS273DWR is supplied in Cut Tape and Digi-Reel, while SN74ALS273DW is supplied in Tube. Both are suitable for surface mount assembly in 20-SOIC configuration.

Q: What is the difference between SN74ALS273DWR and SN74ALS273DW?

A: The electrical specifications are identical. The difference is packaging and product status. SN74ALS273DWR is Active status with Digi-Reel availability, while SN74ALS273DW is Last Time Buy status with Tube packaging. For new designs, SN74ALS273DWR is recommended.

Q: Are there any compliance differences between the substitute parts?

A: No. All three parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8542.39.0001). The Texas Instruments parts include RoHS3 compliance certification.

Q: Can these parts be used in existing designs without PCB modification?

A: Yes. The 20-SOIC package dimensions and pinout are identical across all three parts. No PCB layout changes are required for substitution.

Q: What is the MSL rating and why does it matter?

A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These components can be stored indefinitely without special humidity controls and do not require baking before reflow soldering.