74ABT373CSJ Equivalent & Substitute Parts

Part Overview

The 74ABT373CSJ is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output capability in a 20-SOP package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The 74ABT373 series maintains consistent functional specifications across manufacturers, enabling direct substitution based on electrical and mechanical compatibility parameters.

Substiute Parts

74ABT373CSJ

onsemiIn Stock: 80174ABT373CSJ Datasheet

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SN74ABT373DW

Texas InstrumentsIn Stock: 1066SN74ABT373DW Datasheet

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SN74ABT373DWR

Texas InstrumentsIn Stock: 5113SN74ABT373DWR Datasheet

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SN74ABT373NSR

Texas InstrumentsIn Stock: 2097SN74ABT373NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ABT373CSJ is determined by strict equivalence across the following parameters: logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), supply voltage range (4.5V ~ 5.5V), output current specifications (32mA/64mA), and operating temperature range (-40°C ~ 85°C). All identified substitute parts maintain these core electrical specifications. Package variations (20-SOP versus 20-SOIC) are permitted substitutes provided the physical footprint and pin configuration remain compatible with the application's PCB layout. Propagation delay differences are noted but do not disqualify substitution within the 74ABT373 series, as timing specifications remain within acceptable logic family tolerances.

Parameter Comparison

Engineering Selection Recommendations

All three Texas Instruments substitutes (SN74ABT373DW, SN74ABT373DWR, SN74ABT373NSR) are active products with ROHS3 compliance, providing long-term availability and regulatory alignment compared to the obsolete onsemi 74ABT373CSJ. Selection between these alternatives depends on packaging requirements and procurement format:

SN74ABT373DW and SN74ABT373DWR are functionally identical, differing only in packaging format (tube versus tape & reel). Both feature a 20-SOIC package with 0.295" width, requiring PCB layout verification against the original 0.209" width specification of the 74ABT373CSJ.

SN74ABT373NSR provides package compatibility with the original 74ABT373CSJ, maintaining the 20-SOIC package with 0.209" width, eliminating PCB redesign requirements. This part is supplied in tape & reel format and represents the optimal direct replacement for existing designs.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT373DW and SN74ABT373DWR be used interchangeably with 74ABT373CSJ?

A: Both parts are electrically equivalent and maintain identical functional specifications. However, the 20-SOIC package width differs (0.295" versus 0.209"), requiring PCB footprint verification. If the original PCB layout accommodates the wider package, substitution is valid. The difference between DW and DWR is packaging format only (tube versus tape & reel).

Q: Why does SN74ABT373NSR have different propagation delay than the original part?

A: Propagation delay (4.6ns versus 2.7ns) reflects manufacturing process differences between onsemi and Texas Instruments. Both values remain within acceptable logic family specifications and do not affect functional compatibility in standard applications. Applications with critical timing requirements must evaluate the specific delay impact.

Q: Is the package width difference between 0.209" and 0.295" critical?

A: Package width affects PCB footprint spacing and component density. If the original design uses the 0.209" width (SN74ABT373NSR), direct substitution preserves layout compatibility. If upgrading to the 0.295" width variants (SN74ABT373DW/DWR), PCB layout review is required to confirm adequate spacing and clearance.

Q: Are all three Texas Instruments parts suitable for new designs?

A: Yes. All three parts are active products with ROHS3 compliance. For new designs, SN74ABT373NSR is recommended to maintain consistency with existing 0.209" package specifications. For designs without package constraints, SN74ABT373DWR (tape & reel) offers standard high-volume procurement advantages.

Q: What is the difference between REACH Unaffected and ROHS3 Compliant?

A: REACH Unaffected indicates the original part is not subject to REACH regulations. ROHS3 Compliant indicates the substitute parts meet Restriction of Hazardous Substances Directive requirements, providing regulatory alignment for current manufacturing and export standards.