DM74ALS373WM Equivalent & Substitute Parts

Part Overview

The DM74ALS373WM is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output in a 20-SOIC package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for applications requiring transparent latch functionality with tri-state output capability.

Substiute Parts

DM74ALS373WM

onsemiIn Stock: 4624DM74ALS373WM Datasheet

Current PartRFQ

SN74ALS373ADW

Texas InstrumentsIn Stock: 1989SN74ALS373ADW Datasheet

DirectRFQ

SN74ALS373ADWR

Texas InstrumentsIn Stock: 2395SN74ALS373ADWR Datasheet

DirectRFQ

SN74ALS373ANSR

Texas InstrumentsIn Stock: 4297SN74ALS373ANSR Datasheet

SimilarRFQ

SN74ALS573CDW

Texas InstrumentsIn Stock: 2255SN74ALS573CDW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74ALS373WM is determined by strict alignment of the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Package Type: 20-SOIC or 20-SO
• Operating Temperature Range: 0°C ~ 70°C
• Output Current Specifications: 2.6mA (High), 24mA (Low)

Substitute parts are grouped into three categories based on compatibility level:

Direct Manufacturer Substitutes maintain identical package dimensions (20-SOIC, 0.295" width) and all electrical parameters, differing only in propagation delay or product status.

Similar Manufacturer Substitutes maintain functional equivalence with minor package variations (20-SO, 0.209" width) that may require PCB layout adjustment.

Parametric Equivalents share the same base product series but differ in base product number, requiring functional verification for specific circuit applications.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status Requirement: SN74ALS373ADWR is the primary recommendation. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. It provides identical electrical parameters and package dimensions to the DM74ALS373WM, with ROHS3 compliance for regulatory requirements.

For Propagation Delay Matching: SN74ALS573CDW matches the original 2ns propagation delay specification. However, this part carries Last Time Buy status, indicating limited future availability. Selection should account for long-term procurement strategy.

For Package Flexibility: SN74ALS373ANSR offers active product status with a narrower 20-SO package (0.209" width). This variant requires PCB layout modification due to package width reduction but maintains all electrical specifications and active manufacturing status.

For Compliance and Regulatory Requirements: All Texas Instruments substitutes carry ROHS3 compliance certification, meeting modern environmental and regulatory standards. The onsemi original part does not specify RoHS status.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS373ADWR directly replace DM74ALS373WM without PCB modification? A: Yes. Both parts use identical 20-SOIC packages with 0.295" width and matching pin configurations. No PCB layout changes are required for direct substitution.

Q: What is the significance of the 6ns versus 2ns propagation delay difference? A: Propagation delay affects signal timing in the circuit. The DM74ALS373WM and SN74ALS573CDW specify 2ns delay, while SN74ALS373ADW and SN74ALS373ANSR specify 6ns. For timing-critical applications, verify that 6ns delay remains within system timing margins before substitution.

Q: Why is SN74ALS373ANSR listed as a similar substitute rather than direct substitute? A: SN74ALS373ANSR uses a 20-SO package with 0.209" width, compared to the 0.295" width of the original 20-SOIC package. This dimensional difference requires PCB footprint adjustment, though electrical parameters remain compatible.

Q: What does "Last Time Buy" product status mean for procurement? A: Last Time Buy indicates the manufacturer has announced end-of-life for that part number. Existing inventory may be available, but no new production is planned. For long-term designs, prefer parts with Active status such as SN74ALS373ADWR.

Q: Are all substitute parts ROHS3 compliant? A: All Texas Instruments substitutes listed carry ROHS3 compliance. The original onsemi DM74ALS373WM does not specify RoHS status in the provided data.

Q: Can SN74ALS573CDW be used as a substitute despite having a different base product number? A: SN74ALS573CDW is classified as a parametric equivalent rather than a direct substitute due to its different base product number (74ALS573 versus 74ALS373). While electrical parameters and package dimensions match, functional verification is required for specific circuit applications before substitution.