74F373MSA Equivalent & Substitute Parts

Part Overview

The 74F373MSA is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output capability. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 74F logic series standard, designed for applications requiring transparent latch functionality in a 20-SSOP surface mount package.

Substiute Parts

74F373MSA

onsemiIn Stock: 82974F373MSA Datasheet

Current PartRFQ

SN74F373DBR

Texas InstrumentsIn Stock: 3183SN74F373DBR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F373MSA are identified based on strict electrical and mechanical compatibility criteria. The following parameters must match or remain within acceptable tolerances for direct substitution:

• Logic Type: D-Type Transparent Latch (identical function)
• Circuit Configuration: 8:8 (identical channel count and ratio)
• Output Type: Tri-State (identical output capability)
• Package / Case: 20-SSOP (identical physical footprint and pin count)
• Voltage - Supply: 4.5V ~ 5.5V (identical operating voltage range)
• Operating Temperature: 0°C ~ 70°C (identical temperature range)
• Mounting Type: Surface Mount (identical assembly method)
• Independent Circuits: 1 (identical circuit count)
• Current - Output High, Low: 3mA, 24mA (identical output current specifications)

The SN74F373DBR from Texas Instruments meets all these criteria and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The SN74F373DBR qualifies as a direct functional and mechanical substitute for the 74F373MSA. Selection should be based on the following factors:

Product Status: The 74F373MSA is obsolete, while the SN74F373DBR maintains active production status, ensuring long-term availability and supply chain reliability.

Compliance: The SN74F373DBR carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for new designs and procurement.

Regulatory Alignment: Both parts maintain REACH Unaffected status and identical ECCN/HTSUS classifications, ensuring consistent regulatory treatment.

Performance Consideration: The SN74F373DBR exhibits a propagation delay of 8.6ns compared to the 74F373MSA at 5.3ns. This difference remains within acceptable margins for most 74F logic applications but should be evaluated against specific timing-critical circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74F373DBR be used as a direct replacement for the 74F373MSA in existing designs?

A: Yes. Both parts share identical logic type, circuit configuration, output type, package footprint, voltage supply range, operating temperature range, and output current specifications. Pin-for-pin compatibility is maintained.

Q: What is the primary reason for substitution?

A: The 74F373MSA is classified as obsolete. The SN74F373DBR is an active production part from Texas Instruments, providing continuity for new procurement and design support.

Q: Are there any performance differences between these parts?

A: The propagation delay differs: 74F373MSA operates at 5.3ns while SN74F373DBR operates at 8.6ns. Both remain within 74F logic series specifications. Applications with strict timing requirements should evaluate this parameter against circuit specifications.

Q: What packaging options are available for the SN74F373DBR?

A: The SN74F373DBR is supplied in Tape & Reel (TR) packaging in the 20-SSOP configuration, matching the surface mount requirements of the original part.

Q: Are there compliance or regulatory differences?

A: The SN74F373DBR carries ROHS3 compliance certification. Both parts maintain REACH Unaffected status and identical trade classification codes, ensuring regulatory consistency.

Q: What is the moisture sensitivity level for these parts?

A: Both the 74F373MSA and SN74F373DBR carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage or handling.