74F373SCX D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 74F373SCX 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 and substitute parts necessary for ongoing design support and procurement continuity. The 74F373 series provides a single-channel transparent latch function suitable for data storage and multiplexing applications in digital logic systems.

Substiute Parts

74F373SCX

onsemiIn Stock: 458074F373SCX Datasheet

Current PartRFQ

SN74F373DW

Texas InstrumentsIn Stock: 2464SN74F373DW Datasheet

DirectRFQ

SN74F373DWR

Texas InstrumentsIn Stock: 5326SN74F373DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F373SCX are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Logic Type: D-Type Transparent Latch (identical function)
• Circuit Configuration: 8:8 (identical data path)
• Output Type: Tri-State (identical output capability)
• Supply Voltage Range: 4.5V ~ 5.5V (identical electrical specification)
• Package / Case: 20-SOIC (identical footprint and pinout)
• Mounting Type: Surface Mount (identical assembly method)
• Operating Temperature Range: 0°C ~ 70°C (identical thermal specification)

The substitute parts SN74F373DW and SN74F373DWR, both manufactured by Texas Instruments, meet all critical compatibility criteria. Variations in propagation delay time (5.3ns vs. 8.6ns) and packaging format (tube vs. tape & reel) do not affect functional substitution but may impact system timing margins and procurement logistics.

Parameter Comparison

Engineering Selection Recommendations

SN74F373DWR (Texas Instruments, Active Status) is the primary substitute for new designs and ongoing procurement. This part maintains active product status, ensuring long-term availability and supply chain stability. It carries ROHS3 compliance certification and is available in tape & reel packaging, suitable for automated assembly processes.

SN74F373DW (Texas Instruments, Last Time Buy) serves as a secondary substitute option. While functionally equivalent, its Last Time Buy status indicates limited future availability. This part is packaged in tube format, appropriate for lower-volume applications or manual assembly scenarios.

Both Texas Instruments substitutes are electrically and mechanically compatible with the 74F373SCX. The propagation delay difference (8.6ns vs. 5.3ns) must be evaluated against system timing requirements. All parts share identical supply voltage, output current specifications, and thermal operating ranges.

Frequently Asked Questions (FAQ)

Q: Can SN74F373DW and SN74F373DWR be used interchangeably with 74F373SCX?

A: Yes. Both parts are functionally equivalent substitutes. They share identical logic type, circuit configuration, output type, supply voltage range, package footprint, and operating temperature specifications. The primary differences are product status and packaging format.

Q: What is the significance of the propagation delay difference between 74F373SCX (5.3ns) and the Texas Instruments substitutes (8.6ns)?

A: The 3.3ns delay difference must be evaluated against your system's timing budget. If the original design operated with timing margins, the longer delay of the substitute may be acceptable. Critical timing paths should be re-analyzed to confirm compatibility.

Q: Why is SN74F373DWR recommended over SN74F373DW?

A: SN74F373DWR maintains active product status, ensuring continued availability and manufacturing support. SN74F373DW is in Last Time Buy phase, indicating limited future procurement windows. For new designs and long-term applications, SN74F373DWR is the preferred choice.

Q: Are there any compliance or certification differences between the substitutes?

A: Both Texas Instruments parts are ROHS3 compliant. The original 74F373SCX compliance status is not specified in available documentation. All parts carry identical REACH Unaffected and EAR99 ECCN classifications.

Q: Does the packaging format (tube vs. tape & reel) affect electrical performance?

A: No. Packaging format affects only procurement logistics and assembly process compatibility. Tube packaging suits manual or low-volume assembly; tape & reel packaging is optimized for automated pick-and-place assembly. Electrical and functional performance is identical.

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

A: All parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage or handling.