74ABT373CSJX Equivalent & Substitute Parts

Part Overview

The 74ABT373CSJX 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, which necessitates identification of active equivalent alternatives for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOP surface mount package.

Substiute Parts

74ABT373CSJX

onsemiIn Stock: 103174ABT373CSJX Datasheet

Current PartRFQ

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 eligibility for the 74ABT373CSJX is determined by strict equivalence across the following critical parameters:

• Logic Type & Circuit Configuration: All substitutes must be D-Type Transparent Latch devices with 8:8 circuit configuration
• Output Type: Tri-state output capability is mandatory
• Supply Voltage Range: 4.5V ~ 5.5V compatibility is required
• Independent Circuits: Single channel configuration must be maintained
• Output Current Specifications: 32mA (high) and 64mA (low) output current ratings
• Operating Temperature Range: -40°C ~ 85°C operational envelope
• Mounting Type: Surface mount technology required
• Base Product Number: All substitutes share the 74ABT373 base designation

The identified substitute parts (SN74ABT373DW, SN74ABT373DWR, SN74ABT373NSR) meet all mandatory electrical and functional parameters. Differences in propagation delay (4.6ns vs. 2.7ns), package width dimensions, and product status (active vs. obsolete) are secondary considerations that do not preclude functional substitution within standard logic circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three Texas Instruments substitutes (SN74ABT373DW, SN74ABT373DWR, SN74ABT373NSR) are active products with ROHS3 compliance, providing regulatory and supply chain advantages over the obsolete onsemi part. The primary selection criterion is package compatibility with existing PCB layouts.

SN74ABT373NSR is the preferred direct substitute when PCB footprint constraints require the 20-SOIC (0.209", 5.30mm width) package, matching the original 74ABT373CSJX package dimensions exactly.

SN74ABT373DW and SN74ABT373DWR utilize the wider 20-SOIC (0.295", 7.50mm width) package and are functionally equivalent but require PCB layout modification if the original footprint cannot accommodate the larger package width. The difference between these two parts is packaging format: SN74ABT373DW is supplied in tube packaging, while SN74ABT373DWR is supplied in tape and reel format.

The propagation delay difference (4.6ns vs. 2.7ns) is within acceptable tolerance for standard logic applications and does not constitute a functional limitation for substitution purposes.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT373DW be used as a direct replacement for the 74ABT373CSJX?

A: The SN74ABT373DW is functionally equivalent in all electrical parameters. However, the package width differs (0.295" vs. 0.209"), requiring verification that the PCB footprint can accommodate the larger package. If the original PCB layout has space constraints, the SN74ABT373NSR is the preferred substitute due to identical package dimensions.

Q: What is the significance of the propagation delay difference between the original part and substitutes?

A: The original 74ABT373CSJX has a propagation delay of 2.7ns, while all Texas Instruments substitutes specify 4.6ns. This 1.9ns difference is negligible for standard logic circuit applications and does not affect functional compatibility. Applications with timing-critical requirements should evaluate this parameter against specific circuit timing margins.

Q: Are the Texas Instruments substitutes pin-compatible with the 74ABT373CSJX?

A: Yes. All substitute parts maintain the same pin configuration and functional pinout as the original part. Pin compatibility is guaranteed across all identified substitutes.

Q: What is the difference between SN74ABT373DW and SN74ABT373DWR?

A: Both parts are electrically and functionally identical. The difference is in packaging format: SN74ABT373DW is supplied in tube packaging, while SN74ABT373DWR is supplied in tape and reel format. Selection depends on procurement and assembly process requirements.

Q: Why is the 74ABT373CSJX marked as obsolete?

A: The onsemi 74ABT373CSJX has reached end-of-life status. Active alternatives from Texas Instruments ensure continued availability and supply chain reliability for new designs and production requirements.

Q: Are all substitutes RoHS compliant?

A: Yes. All three Texas Instruments substitutes (SN74ABT373DW, SN74ABT373DWR, SN74ABT373NSR) are ROHS3 compliant, meeting current environmental and regulatory requirements.