74VHCT373ASJ Equivalent & Substitute Parts

Part Overview

The 74VHCT373ASJ 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 identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. 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

74VHCT373ASJ

onsemiIn Stock: 86274VHCT373ASJ Datasheet

Current PartRFQ

SN74AHCT373NSR

Texas InstrumentsIn Stock: 5139SN74AHCT373NSR Datasheet

DirectRFQ

SN74LV373ATNSR

Texas InstrumentsIn Stock: 2990SN74LV373ATNSR Datasheet

DirectRFQ

SN74AHCT373DW

Texas InstrumentsIn Stock: 1767SN74AHCT373DW Datasheet

SimilarRFQ

SN74AHCT373DWR

Texas InstrumentsIn Stock: 3232SN74AHCT373DWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VHCT373ASJ 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 Compatibility: 20-SOIC footprint variants

Substitute parts are categorized as Direct or Similar based on package dimensions and product status. Direct substitutes maintain identical or functionally compatible package specifications. Similar substitutes may require PCB layout verification due to package dimension variations while maintaining electrical equivalence.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Recommended Priority):

SN74AHCT373NSR and SN74AHCT373DWR are the primary direct substitutes for the 74VHCT373ASJ. Both are manufactured by Texas Instruments, maintain active product status, and provide ROHS3 compliance. SN74AHCT373NSR features the identical 20-SOIC package footprint (0.209", 5.30mm Width) as the original part and is supplied in Tape & Reel packaging. SN74AHCT373DWR uses a wider 20-SOIC package variant (0.295", 7.50mm Width) and is also supplied in Tape & Reel format. Both parts demonstrate improved propagation delay performance (1ns versus 5.1ns) while maintaining equivalent output current specifications and supply voltage range.

Alternative Substitute:

SN74LV373ATNSR provides functional equivalence with identical package footprint and active product status. This part features increased output current capability (16mA versus 8mA) and ROHS3 compliance. The enhanced current drive may benefit applications requiring higher output loading.

Compliance Considerations:

All recommended substitutes maintain MSL Level 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status, matching the original part's environmental specifications. ROHS3 compliance of substitute parts ensures regulatory alignment for new designs and system updates.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT373NSR directly replace the 74VHCT373ASJ without PCB modifications?

A: Yes. SN74AHCT373NSR maintains identical package footprint dimensions (20-SOIC, 0.209", 5.30mm Width), supply voltage range (4.5V ~ 5.5V), and all functional parameters. No PCB layout changes are required.

Q: What is the difference between SN74AHCT373DW and SN74AHCT373DWR?

A: Both parts are electrically identical with identical propagation delay and output current specifications. The primary difference is packaging format: SN74AHCT373DW is supplied in Tube packaging and has obsolete product status, while SN74AHCT373DWR is supplied in Tape & Reel format with active product status. Additionally, SN74AHCT373DW uses a wider package variant (0.295", 7.50mm Width) compared to the original 74VHCT373ASJ (0.209", 5.30mm Width), requiring PCB verification.

Q: Why does SN74LV373ATNSR have higher output current (16mA) than other substitutes?

A: The 74LV series is designed with enhanced output drive capability. This higher current specification does not affect compatibility with the original 74VHCT373ASJ design but provides additional margin for applications with higher output loading requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitutes (SN74AHCT373NSR, SN74LV373ATNSR, SN74AHCT373DW, and SN74AHCT373DWR) are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the impact of improved propagation delay (1ns versus 5.1ns) on system performance?

A: The substitute parts demonstrate faster propagation delay, which represents improved performance. Systems designed for the original 74VHCT373ASJ specifications will operate within tighter timing margins with substitute parts, providing additional timing margin rather than creating compatibility issues.

Q: Should I select SN74AHCT373NSR or SN74AHCT373DWR for new designs?

A: SN74AHCT373NSR is recommended for new designs. It maintains the original package footprint (0.209", 5.30mm Width), eliminating PCB layout verification requirements. SN74AHCT373DWR is suitable when the wider package variant (0.295", 7.50mm Width) is already accommodated in existing PCB designs.