DM74AS373WMX Equivalent & Substitute Parts

Part Overview

The DM74AS373WMX is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 channel configuration with tri-state output capability. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package.

Substiute Parts

DM74AS373WMX

onsemiIn Stock: 1181DM74AS373WMX Datasheet

Current PartRFQ

SN74AS373NSR

Texas InstrumentsIn Stock: 2912SN74AS373NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74AS373WMX is determined by strict alignment of the following critical parameters:

• Logic Type: D-Type Transparent Latch (functional architecture must remain identical)
• Circuit Configuration: 8:8 (channel count and arrangement must match)
• Output Type: Tri-State (output stage topology must be preserved)
• Voltage - Supply: 4.5V ~ 5.5V (operating voltage range must be compatible)
• Independent Circuits: 1 (circuit count must be equivalent)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Package / Case: 20-SOIC form factor (physical and electrical pin compatibility)

The SN74AS373NSR from Texas Instruments satisfies all substitution criteria within these parameters. Both parts share the same base product number (74AS373) and maintain functional equivalence across all specified electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS373NSR is the qualified substitute for the DM74AS373WMX based on the following factors:

Product Status: The SN74AS373NSR maintains Active product status with ongoing manufacturer support, whereas the DM74AS373WMX is classified as Obsolete. This distinction is critical for long-term supply chain reliability and technical documentation availability.

Compliance & Certifications: The SN74AS373NSR carries RoHS3 Compliance certification, providing environmental and regulatory alignment with modern manufacturing standards. Both parts maintain REACH Unaffected status and EAR99 export classification.

Electrical Equivalence: All core electrical parameters—supply voltage, output current ratings, and operating temperature range—are identical between the two parts. The propagation delay differential (4.6ns versus 6ns) falls within acceptable tolerance for most 74AS logic applications and does not constitute a functional incompatibility.

Physical Compatibility: Both parts utilize 20-SOIC surface mount packaging with identical pin configurations. The package width variance (7.50mm versus 5.30mm) reflects manufacturing process evolution but maintains full electrical and mechanical interchangeability on standard PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS373NSR be used as a direct replacement for the DM74AS373WMX?

A: Yes. Both parts share identical logic type, circuit configuration, output type, supply voltage range, and pin count. The 20-SOIC package format ensures mechanical and electrical compatibility on existing PCB designs.

Q: What is the significance of the propagation delay difference (4.6ns vs. 6ns)?

A: The SN74AS373NSR exhibits a longer propagation delay. This parameter difference must be evaluated against system timing requirements. In applications where the original 4.6ns specification was not a critical constraint, the 6ns delay is functionally acceptable.

Q: Why does the DM74AS373WMX show as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support. The SN74AS373NSR, with Active status, provides continuity of supply and access to current technical documentation and support resources.

Q: Are there package width differences, and do they affect compatibility?

A: The package width variance (7.50mm versus 5.30mm) reflects different manufacturing generations but does not affect electrical performance or pin compatibility. Standard PCB layouts accommodate both package widths without modification.

Q: What compliance certifications apply to the substitute part?

A: The SN74AS373NSR is RoHS3 Compliant and maintains REACH Unaffected status. Both parts carry EAR99 export classification. Verify compliance requirements against your specific application and regional regulations.