74HC373DTR2G D-Type Transparent Latch IC Equivalent & Substitute Parts

Part Overview

The 74HC373DTR2G is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output in a 20-TSSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 74HC373 series represents a standard logic latch function across multiple manufacturers, with several active alternatives available in compatible or functionally equivalent packages.

Substiute Parts

74HC373DTR2G

onsemiIn Stock: 121374HC373DTR2G Datasheet

Current PartRFQ

MM74HC373MTCX

onsemiIn Stock: 16703MM74HC373MTCX Datasheet

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MC74HC373ADTR2G

onsemiIn Stock: 2393MC74HC373ADTR2G Datasheet

Parametric EquivalentRFQ

74HC373PW,118

Nexperia USA Inc.In Stock: 832074HC373PW,118 Datasheet

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SN74HC373DBR

Texas InstrumentsIn Stock: 1989SN74HC373DBR Datasheet

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SN74HC373PW

Texas InstrumentsIn Stock: 1545SN74HC373PW Datasheet

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SN74HC373PWR

Texas InstrumentsIn Stock: 2479SN74HC373PWR Datasheet

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SN74HC373PWT

Texas InstrumentsIn Stock: 2155SN74HC373PWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC373DTR2G is determined by the following critical parameters:

Functional Equivalence Requirements:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Voltage Supply Range: 2V to 6V (minimum overlap required)
• Independent Circuits: 1 Channel

Package Compatibility Considerations:

• Primary compatibility: 20-TSSOP package (0.173", 4.40mm Width)
• Secondary compatibility: 20-SSOP package (0.209", 5.30mm Width) with PCB layout verification
• Mounting Type: Surface Mount

Electrical Performance Parameters:

• Propagation Delay: 21ns (reference); substitutes with ≤21ns acceptable
• Output Current: 7.8mA minimum (High and Low)
• Operating Temperature Range: -55°C to 125°C (reference); substitutes with overlapping or extended range acceptable

Compliance & Certification:

• RoHS Status: ROHS3 Compliant preferred
• REACH Status: REACH Unaffected
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: parametric equivalents (matching all electrical specifications and temperature range) and similar parts (matching functional and package specifications with minor electrical or temperature variations).

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalent (Recommended Primary Substitute):

MC74HC373ADTR2G is the optimal substitute for 74HC373DTR2G. This part maintains identical electrical specifications (21ns propagation delay, -55°C to 125°C operating range) and package configuration (20-TSSOP). The part is currently active with ROHS3 compliance certification, providing long-term availability and regulatory alignment.

Active Alternatives with Compatible Specifications:

SN74HC373PWR (Texas Instruments) and 74HC373PW,118 (Nexperia USA Inc.) are active alternatives in the 20-TSSOP package. Both offer faster propagation delay (15ns and 12ns respectively) and ROHS3 compliance. Operating temperature ranges are -40°C to 85°C and -40°C to 125°C respectively. These parts are suitable for applications where the original -55°C lower temperature limit is not required.

Package-Compatible Alternative:

SN74HC373DBR (Texas Instruments) uses a 20-SSOP package (0.209", 5.30mm Width) instead of 20-TSSOP. This part is functionally equivalent but requires PCB layout verification due to package footprint differences. The part is active with ROHS3 compliance and operates within -40°C to 85°C range.

Availability Consideration:

MM74HC373MTCX (onsemi) is an active alternative with 19ns propagation delay and ROHS3 compliance. Operating temperature range is -40°C to 85°C. This part provides a middle-ground option between the original specification and faster alternatives.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74HC373DTR2G with MC74HC373ADTR2G without design changes?

A: Yes. MC74HC373ADTR2G is a parametric equivalent with identical propagation delay (21ns), operating temperature range (-55°C to 125°C), output current specifications (7.8mA), and 20-TSSOP package. No circuit modifications are required.

Q: What is the difference between 20-TSSOP and 20-SSOP packages?

A: Both are 20-pin surface mount packages for the 74HC373 logic latch. The 20-TSSOP measures 0.173" (4.40mm) in width, while the 20-SSOP measures 0.209" (5.30mm) in width. PCB footprints differ; verify land pattern compatibility before substituting SN74HC373DBR (20-SSOP) for the original 20-TSSOP design.

Q: Why is the original 74HC373DTR2G marked as obsolete?

A: The part is no longer manufactured by onsemi. Active alternatives from onsemi (MC74HC373ADTR2G, MM74HC373MTCX) and other manufacturers (Texas Instruments, Nexperia) provide equivalent or superior functionality with current production status and compliance certifications.

Q: Are all substitute parts ROHS3 compliant?

A: All listed active substitute parts carry ROHS3 compliance certification. The original 74HC373DTR2G does not specify RoHS status. Verify compliance requirements for your application before final selection.

Q: Which substitute offers the fastest propagation delay?

A: 74HC373PW,118 (Nexperia USA Inc.) provides the fastest propagation delay at 12ns, compared to the original 21ns specification. This part is suitable for applications requiring improved timing performance, provided the operating temperature range (-40°C to 125°C) meets system requirements.

Q: Can I use SN74HC373PWR as a drop-in replacement?

A: SN74HC373PWR is functionally compatible with identical 20-TSSOP package and tri-state output configuration. Propagation delay is 15ns (faster than original 21ns), and operating temperature is -40°C to 85°C. Verify that the reduced lower temperature limit (-40°C vs. -55°C) is acceptable for your application environment.

Q: What is the inventory status of substitute parts?

A: MC74HC373ADTR2G (2,360 pcs), MM74HC373MTCX (16,644 pcs), 74HC373PW,118 (8,276 pcs), SN74HC373PWR (2,440 pcs), and SN74HC373DBR (1,900 pcs) are all available in stock as new original components. Verify current availability with your supplier before design finalization.