74ABT373CSCX Equivalent & Substitute Parts

Part Overview

The 74ABT373CSCX is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. 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

74ABT373CSCX

onsemiIn Stock: 453774ABT373CSCX 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 74ABT373CSCX is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Independent Circuits: 1
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package Family: 20-SOIC

All identified substitute parts maintain these core electrical and mechanical specifications. Variations in propagation delay time (2.7ns vs. 4.6ns) and package width dimensions are noted but do not prevent functional substitution within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

All three Texas Instruments substitute parts (SN74ABT373DW, SN74ABT373DWR, SN74ABT373NSR) are active products with ROHS3 compliance, providing long-term availability and regulatory alignment compared to the obsolete onsemi 74ABT373CSCX.

SN74ABT373DW and SN74ABT373DWR are functionally identical, differing only in packaging format (Tube vs. Tape & Reel). Both maintain the standard 20-SOIC package dimensions (0.295", 7.50mm width) matching the original part.

SN74ABT373NSR uses a narrower 20-SO package variant (0.209", 5.30mm width). This dimensional difference requires PCB layout verification before selection, as pad spacing and footprint compatibility must be confirmed for existing designs.

All substitute parts maintain electrical equivalence across supply voltage, operating temperature, output current, and circuit configuration parameters.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT373NSR be used as a direct replacement for 74ABT373CSCX?

A: SN74ABT373NSR is electrically equivalent but uses a narrower 20-SO package (5.30mm width) versus the standard 20-SOIC package (7.50mm width) of the original part. PCB footprint compatibility must be verified before substitution.

Q: What is the difference between SN74ABT373DW and SN74ABT373DWR?

A: Both parts are electrically and mechanically identical. SN74ABT373DW is supplied in Tube packaging, while SN74ABT373DWR is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Why does the 74ABT373CSCX have a faster propagation delay (2.7ns) than the Texas Instruments substitutes (4.6ns)?

A: Propagation delay variation within the specified parameter range does not prevent functional substitution. Both values fall within acceptable operating margins for D-Type Transparent Latch applications. Design timing analysis should confirm compatibility with system requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three Texas Instruments substitute parts (SN74ABT373DW, SN74ABT373DWR, SN74ABT373NSR) are ROHS3 compliant. The original onsemi part does not specify RoHS status.

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

A: All parts, including the original 74ABT373CSCX and all substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.