74AC373SJ D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 74AC373SJ is a D-Type Transparent Latch IC manufactured by onsemi, featuring an 8:8 channel 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 74AC373 series represents a standard logic family with multiple manufacturer sources and packaging options available in the market.

Substiute Parts

74AC373SJ

onsemiIn Stock: 76174AC373SJ Datasheet

Current PartRFQ

SN74AC373NSR

Texas InstrumentsIn Stock: 2896SN74AC373NSR Datasheet

DirectRFQ

CD74AC373M

Harris CorporationIn Stock: 1937CD74AC373M Datasheet

SimilarRFQ

CD74AC373M96

Texas InstrumentsIn Stock: 1905CD74AC373M96 Datasheet

SimilarRFQ

SN74AC373DW

Texas InstrumentsIn Stock: 2420SN74AC373DW Datasheet

SimilarRFQ

SN74AC373DWR

Texas InstrumentsIn Stock: 4416SN74AC373DWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74AC373SJ is determined by the following critical parameters:

Primary Compatibility Criteria:

• Logic type: D-Type Transparent Latch
• Circuit configuration: 8:8 channels
• Output type: Tri-State
• Mounting type: Surface Mount
• Base product number: 74AC373

Electrical Compatibility Parameters:

• Voltage supply range (must encompass or match the operating range)
• Output current capability (24mA minimum for both high and low states)
• Propagation delay characteristics
• Operating temperature range

Packaging Considerations:

• Package family: 20-pin SOIC variants
• Physical dimensions must be compatible with PCB layout requirements
• Supplier device package designation

Substitute parts are grouped into two categories: direct manufacturer equivalents (identical electrical and thermal specifications) and similar parts (compatible electrical performance with extended or different operating ranges).

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended Primary Substitutes):

SN74AC373NSR (Texas Instruments) and SN74AC373DWR (Texas Instruments) are the preferred substitutes for the 74AC373SJ. Both parts maintain identical voltage supply ranges (2V ~ 6V), output current specifications (24mA / 24mA), and operating temperature ranges (-40°C ~ 85°C). These parts feature active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The SN74AC373NSR is supplied in Tape & Reel packaging, while SN74AC373DWR is available in Cut Tape & Digi-Reel format.

Extended Operating Range Alternatives:

CD74AC373M96 (Texas Instruments) and CD74AC373M (Harris Corporation) provide extended operating temperature ranges (-55°C ~ 125°C) and lower voltage supply minimums (1.5V ~ 5.5V). These parts are suitable for applications requiring enhanced thermal performance. CD74AC373M96 maintains active status and ROHS3 compliance. Note that CD74AC373M is obsolete and RoHS non-compliant.

Packaging Considerations:

The 74AC373SJ uses a narrower 20-SOIC package (0.209", 5.30mm width). Direct substitutes SN74AC373NSR maintains this package dimension. Alternative parts (CD74AC373M96, SN74AC373DW, SN74AC373DWR) use wider 20-SOIC packages (0.295", 7.50mm width), requiring PCB layout verification before implementation.

Compliance and Availability:

For new designs and long-term procurement, select from active-status parts with ROHS3 compliance: SN74AC373NSR, CD74AC373M96, or SN74AC373DWR. These ensure regulatory compliance and sustained market availability.

Frequently Asked Questions (FAQ)

Q: Can I use SN74AC373DWR as a direct replacement for 74AC373SJ?

A: SN74AC373DWR is electrically compatible with identical voltage supply (2V ~ 6V), output current (24mA / 24mA), and operating temperature (-40°C ~ 85°C) specifications. However, the package width differs (0.295" vs 0.209"), requiring PCB layout verification. The part is active and ROHS3 compliant.

Q: What is the difference between CD74AC373M and CD74AC373M96?

A: Both parts share identical electrical specifications (1.5V ~ 5.5V supply, 3ns propagation delay, -55°C ~ 125°C operating range). CD74AC373M96 is supplied in Cut Tape format and maintains active status with ROHS3 compliance. CD74AC373M is obsolete and RoHS non-compliant. CD74AC373M96 is the preferred choice for new applications.

Q: Are there propagation delay differences between substitute options?

A: Yes. The 74AC373SJ specifies 7ns propagation delay. SN74AC373NSR and SN74AC373DWR match this at 7.5ns. CD74AC373M and CD74AC373M96 feature faster 3ns propagation delay. Verify timing requirements in your application before selecting faster alternatives.

Q: Which substitute offers the best long-term availability?

A: SN74AC373NSR and SN74AC373DWR (both Texas Instruments, active status, ROHS3 compliant) provide the strongest long-term availability. CD74AC373M96 is also active and compliant. Avoid obsolete parts (74AC373SJ, CD74AC373M) for new designs.

Q: Can I use parts with extended temperature ranges (-55°C ~ 125°C) in standard applications?

A: Yes. Extended temperature range parts (CD74AC373M96, CD74AC373M) are backward compatible with standard operating ranges. They provide additional thermal margin without functional impact on standard applications.

Q: What packaging formats are available?

A: SN74AC373NSR is supplied in Tape & Reel (TR). SN74AC373DWR is available in Cut Tape (CT) & Digi-Reel. CD74AC373M96 is supplied in Cut Tape (CT). CD74AC373M is supplied in Tube. Select based on procurement volume and assembly requirements.