DM74LS373WM Equivalent & Substitute Parts

Part Overview

The DM74LS373WM is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 channel configuration with tri-state output in a 20-SOIC surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates within the 74LS logic family standard, which defines compatibility parameters across multiple manufacturers.

Substiute Parts

DM74LS373WM

onsemiIn Stock: 2142DM74LS373WM Datasheet

Current PartRFQ

SN74LS373DW

Texas InstrumentsIn Stock: 1919SN74LS373DW Datasheet

DirectRFQ

SN74LS373DWR

Texas InstrumentsIn Stock: 15409SN74LS373DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74LS373WM is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch (functional architecture)
• Circuit Configuration: 8:8 (channel count and pin mapping)
• Output Type: Tri-State (electrical output characteristic)
• Voltage Supply Range: 4.75V ~ 5.25V (power supply compatibility)
• Independent Circuits: 1 (circuit count)
• Package Type: 20-SOIC (physical and electrical footprint)
• Mounting Type: Surface Mount (assembly compatibility)
• Base Product Number: 74LS373 (standardized logic family designation)

The substitute parts SN74LS373DW and SN74LS373DWR, both manufactured by Texas Instruments, meet all substitution criteria. Both parts maintain identical logic architecture, circuit configuration, output characteristics, voltage specifications, package dimensions, and mounting type. Differences in propagation delay (12ns versus 18ns) and packaging format do not affect functional substitutability within the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the DM74LS373WM, the SN74LS373DWR represents the primary substitute option. This part is manufactured by Texas Instruments, maintains active product status, carries ROHS3 compliance certification, and is available in high-volume tape and reel packaging suitable for automated assembly processes. The SN74LS373DWR exhibits superior propagation delay performance (12ns versus 18ns), which provides timing margin in digital logic circuits without introducing compatibility issues.

The SN74LS373DW serves as an alternative substitute with identical electrical and functional characteristics to the SN74LS373DWR. However, this variant is discontinued at DiGi Electronics and may present supply chain constraints. Selection between these two Texas Instruments options should prioritize availability and packaging requirements for the specific application.

All three parts share identical logic architecture, voltage specifications, output characteristics, and package footprint, ensuring direct functional substitution within the 74LS logic family standard.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS373DW and SN74LS373DWR be used interchangeably with the DM74LS373WM?

A: Yes. Both Texas Instruments parts are functionally equivalent substitutes. They maintain identical logic type, circuit configuration, output type, voltage supply range, independent circuit count, output current specifications, operating temperature range, package type, and mounting type. The primary differences are propagation delay (12ns versus 18ns) and packaging format, neither of which affects functional substitutability.

Q: What is the significance of the propagation delay difference between the DM74LS373WM (18ns) and the substitute parts (12ns)?

A: The substitute parts exhibit faster propagation delay, which represents improved timing performance. This faster response does not create compatibility issues in circuits designed for the original 18ns specification, as the substitute parts will operate within the same functional envelope with additional timing margin.

Q: Are there packaging considerations when selecting between SN74LS373DW and SN74LS373DWR?

A: Yes. The SN74LS373DW is supplied in tube packaging, while the SN74LS373DWR is supplied in tape and reel format. Tape and reel packaging is optimized for high-volume automated assembly processes, whereas tube packaging is suitable for lower-volume or manual assembly applications. Select based on production volume and assembly equipment compatibility.

Q: What is the current availability status of these substitute parts?

A: The SN74LS373DWR maintains active product status with 15,300 pieces in stock. The SN74LS373DW is discontinued at DiGi Electronics with 1,900 pieces in stock. For new designs or production continuity, the SN74LS373DWR is the recommended selection.

Q: Do the substitute parts meet current compliance standards?

A: Yes. Both SN74LS373DW and SN74LS373DWR carry ROHS3 compliance certification and maintain REACH Unaffected status, meeting current environmental and regulatory requirements for electronic components.