74VHCT08ASJ Equivalent & Substitute Parts

Part Overview

The 74VHCT08ASJ is a 4-channel AND gate logic IC manufactured by onsemi in a 14-SOP surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74VHCT08 series provides standard AND gate functionality with VHCT logic family specifications, operating across a 4.5V to 5.5V supply voltage range.

Substiute Parts

74VHCT08ASJ

onsemiIn Stock: 83174VHCT08ASJ Datasheet

Current PartRFQ

SN74AHCT08NSR

Texas InstrumentsIn Stock: 5475SN74AHCT08NSR Datasheet

DirectRFQ

74AHCT08D,118

NXP SemiconductorsIn Stock: 25708074AHCT08D,118 Datasheet

SimilarRFQ

SN74AHCT08D

Texas InstrumentsIn Stock: 5400SN74AHCT08D Datasheet

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SN74AHCT08DR

Texas InstrumentsIn Stock: 2425SN74AHCT08DR Datasheet

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SN74AHCT08MDREP

Texas InstrumentsIn Stock: 1190SN74AHCT08MDREP Datasheet

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SN74AHCT08QDRQ1

Texas InstrumentsIn Stock: 3786SN74AHCT08QDRQ1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74VHCT08ASJ are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain identical logic function (4-channel AND gate with 2 inputs per channel), circuit count, and input configuration.

Electrical Compatibility: Supply voltage range (4.5V ~ 5.5V), quiescent current (2 µA max), output drive capability (8mA), input logic thresholds (0.8V low, 2V high), and propagation delay (7.9ns @ 5V, 50pF) are preserved across all qualified substitutes.

Package Compatibility: Substitutes are available in 14-SOIC surface mount packages with equivalent pin configurations and mechanical dimensions suitable for direct board-level replacement.

Key Differentiators: Operating temperature range, product status (active vs. discontinued), packaging format (tape & reel, cut tape, tube, bulk), and compliance certifications (RoHS3, AEC-Q100 for automotive applications) distinguish substitute options for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

For Standard Commercial Applications: SN74AHCT08NSR (Texas Instruments, active status, tape & reel packaging) provides direct functional replacement with extended operating temperature range (-40°C to 125°C) and RoHS3 compliance. This part is actively manufactured and widely available.

For Automotive Applications: SN74AHCT08QDRQ1 (Texas Instruments, AEC-Q100 qualified, automotive grade) is specified for automotive-grade requirements with active product status and RoHS3 compliance.

For Extended Temperature Range: SN74AHCT08MDREP (Texas Instruments, -55°C to 125°C operating range) accommodates applications requiring broader temperature performance while maintaining active production status and RoHS3 compliance.

For High-Volume Production: 74AHCT08D,118 (NXP Semiconductors, bulk packaging, active status) supports high-volume procurement with alternative manufacturer sourcing.

For Tape & Reel Automation: SN74AHCT08NSR and SN74AHCT08MDREP both offer tape & reel packaging suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 74VHCT08ASJ be directly replaced with SN74AHCT08NSR? A: Yes. Both parts maintain identical logic function (4-channel AND gate), electrical specifications (4.5V ~ 5.5V supply, 2 µA quiescent current, 8mA output drive, 7.9ns propagation delay), and 14-SOIC surface mount package configuration. The SN74AHCT08NSR offers extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C) and active product status.

Q: What is the difference between the 74VHCT and 74AHCT logic families? A: Both families provide equivalent electrical performance for this AND gate function. The 74AHCT series from Texas Instruments and NXP offers active production status and RoHS3 compliance, whereas the 74VHCT series (onsemi) is now obsolete. Functional substitution is direct based on matching logic type, circuit count, and electrical parameters.

Q: Are there package dimension differences between substitute parts? A: The original 74VHCT08ASJ uses a 14-SOIC package with 0.209" width (5.30mm). Most Texas Instruments substitutes (SN74AHCT08D, SN74AHCT08DR, SN74AHCT08MDREP, SN74AHCT08QDRQ1) use a 14-SOIC package with 0.154" width (3.90mm). Both are 14-pin SOIC packages with identical pin configurations; verify PCB footprint compatibility before selection.

Q: Which substitute part offers the best availability? A: SN74AHCT08NSR (Texas Instruments) and SN74AHCT08QDRQ1 (Texas Instruments automotive-grade) show active production status with substantial inventory levels. NXP's 74AHCT08D,118 in bulk packaging also provides high-volume availability.

Q: Is RoHS3 compliance required for my application? A: All Texas Instruments substitutes (SN74AHCT08NSR, SN74AHCT08D, SN74AHCT08DR, SN74AHCT08MDREP, SN74AHCT08QDRQ1) are RoHS3 compliant. If RoHS3 compliance is mandatory, select from these Texas Instruments options or the NXP 74AHCT08D,118.

Q: What packaging format should I select for automated assembly? A: For automated pick-and-place assembly, select tape & reel (TR) packaging: SN74AHCT08NSR or SN74AHCT08MDREP. Cut tape (CT) & Digi-Reel® format (SN74AHCT08DR) also supports automation. Tube and bulk formats are suitable for manual assembly or reel conversion.