74HC373N,652 Equivalent & Substitute Parts

Part Overview

The 74HC373N,652 is a D-Type Transparent Latch logic IC manufactured by NXP USA Inc., featuring an 8:8 circuit configuration with tri-state output in a 20-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 74HC373 series represents a standard logic latch function across multiple manufacturers, with several active alternatives available that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

74HC373N,652

NXP USA Inc.In Stock: 100874HC373N,652 Datasheet

Current PartRFQ

CD74HC373E

Harris CorporationIn Stock: 1338CD74HC373E Datasheet

DirectRFQ

SN74HC373N

Texas InstrumentsIn Stock: 3577SN74HC373N Datasheet

DirectRFQ

74HC373D,653

Nexperia USA Inc.In Stock: 207174HC373D,653 Datasheet

MFR RecommendedRFQ

TC74HC373APF

Toshiba Semiconductor and StorageIn Stock: 21347TC74HC373APF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC373N,652 is determined by the following critical parameters: logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), supply voltage range (2V ~ 6V), and independent circuits (1). All substitute parts listed maintain these core functional specifications.

Substitute parts are grouped into two categories based on package type:

Through-Hole Package Substitutes (Direct Pin-Compatible): SN74HC373N, CD74HC373E, and TC74HC373APF maintain the 20-DIP package format, enabling direct board-level replacement without layout modification.

Surface-Mount Package Substitute (Functional Equivalent): 74HC373D,653 provides equivalent functionality in a 20-SOIC surface-mount package, requiring PCB redesign for implementation.

All substitutes operate within the specified voltage supply range (2V ~ 6V) and maintain tri-state output capability with matching output current specifications (7.8mA high/low).

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Replacement (No PCB Modification):

SN74HC373N (Texas Instruments) is the primary active substitute. It maintains 20-DIP package compatibility, ROHS3 compliance, and active product status. Propagation delay of 15ns is within acceptable tolerance for most applications. Operating temperature range (-40°C to +85°C) covers standard industrial requirements but does not extend to the full +125°C upper limit of the original part.

TC74HC373APF (Toshiba Semiconductor) provides equivalent performance with 12ns propagation delay matching the original specification and extended temperature range to +125°C. RoHS compliance is confirmed. This option is suitable for applications requiring full temperature range coverage.

CD74HC373E (Harris Corporation) maintains 20-DIP compatibility but exhibits 30ns propagation delay and lacks RoHS compliance. This part is classified as obsolete and should be considered only when other substitutes are unavailable.

For Surface-Mount Implementation:

74HC373D,653 (Nexperia USA Inc.) is the manufacturer-recommended substitute offering active product status, ROHS3 compliance, and extended temperature range (-40°C to +125°C). The 20-SOIC package requires PCB redesign but provides equivalent electrical performance with 12ns propagation delay. This option is suitable for new designs or board revisions.

Frequently Asked Questions (FAQ)

Q: Can SN74HC373N be used as a direct replacement for 74HC373N,652 on existing PCBs?

A: Yes. Both parts use the 20-DIP package with identical pinout and electrical specifications (2V ~ 6V supply, 8:8 latch configuration, tri-state output, 7.8mA output current). No PCB modification is required. Verify that the operating temperature range (-40°C to +85°C for SN74HC373N) meets your application requirements.

Q: What is the difference between the through-hole and surface-mount substitutes?

A: Through-hole substitutes (SN74HC373N, TC74HC373APF, CD74HC373E) use 20-DIP packages compatible with existing through-hole PCB layouts. The surface-mount substitute (74HC373D,653) uses a 20-SOIC package requiring PCB redesign. Electrical functionality is equivalent across all options.

Q: Why does CD74HC373E show 30ns propagation delay compared to 12ns for other parts?

A: Propagation delay variation reflects manufacturing process differences between Harris Corporation and other manufacturers. The 30ns specification remains within acceptable logic timing for most applications but may impact designs with tight timing constraints. Verify timing requirements before selection.

Q: Are all substitutes RoHS compliant?

A: SN74HC373N, TC74HC373APF, and 74HC373D,653 are RoHS compliant (ROHS3 or RoHS Compliant status). CD74HC373E is RoHS non-compliant. For applications requiring RoHS compliance, select from the compliant options.

Q: Which substitute supports the full -40°C to +125°C temperature range of the original part?

A: TC74HC373APF (Toshiba) and 74HC373D,653 (Nexperia) both support the extended -40°C to +125°C operating range. SN74HC373N is limited to -40°C to +85°C.

Q: Can 74HC373D,653 be used in applications currently using through-hole packages?

A: No. The 74HC373D,653 uses a 20-SOIC surface-mount package and cannot be directly installed in through-hole PCB layouts. Implementation requires PCB redesign or use of an adapter carrier.