74VHC14SJ Equivalent & Substitute Parts

Part Overview

The 74VHC14SJ is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in a 14-SOP package. This logic component is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a 2V to 5.5V supply voltage range and is suitable for general-purpose logic inversion applications requiring noise immunity through Schmitt trigger hysteresis.

Substiute Parts

74VHC14SJ

onsemiIn Stock: 218774VHC14SJ Datasheet

Current PartRFQ

MC74VHC14DG

onsemiIn Stock: 1574MC74VHC14DG Datasheet

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SN74AHC14NSR

Texas InstrumentsIn Stock: 14212SN74AHC14NSR Datasheet

DirectRFQ

74AHC14D,118

Nexperia USA Inc.In Stock: 1498374AHC14D,118 Datasheet

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SN74AHC14D

Texas InstrumentsIn Stock: 2265SN74AHC14D Datasheet

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SN74AHC14DR

Texas InstrumentsIn Stock: 6487SN74AHC14DR Datasheet

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SN74AHC14MDREP

Texas InstrumentsIn Stock: 19349SN74AHC14MDREP Datasheet

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SN74AHC14QDRQ1

Texas InstrumentsIn Stock: 5680SN74AHC14QDRQ1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74VHC14SJ is determined by the following critical parameters:

• Logic Function: All substitutes must be 6-channel inverters with Schmitt trigger inputs
• Electrical Specifications: Supply voltage range (2V ~ 5.5V), quiescent current, output drive current, input logic levels, and propagation delay must be equivalent or superior
• Package Compatibility: Physical package dimensions and pin count must match or be compatible with the original 14-SOIC footprint
• Mounting Type: Surface mount requirement must be maintained
• Moisture Sensitivity: MSL rating of 1 (Unlimited) is acceptable across all substitutes

Substitute parts are grouped into two categories: active product status parts (preferred for new designs) and discontinued parts (available for legacy support). All listed substitutes maintain the core 74VHC or 74AHC logic family designation, ensuring functional and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: Select from active product status parts with ROHS3 compliance. SN74AHC14NSR, SN74AHC14DR, SN74AHC14MDREP, and SN74AHC14QDRQ1 are all actively manufactured by Texas Instruments. MC74VHC14DG remains active from onsemi. The 74AHC14D,118 from Nexperia is also active. All these options provide extended temperature ranges (-40°C to 125°C or -55°C to 125°C) compared to the original 74VHC14SJ.

For Legacy Support: SN74AHC14D is discontinued at DiGi Electronics but may be available through alternative channels. This part maintains full electrical compatibility with the original.

Package Consideration: The original 74VHC14SJ uses a 14-SOIC package with 0.209" width. SN74AHC14NSR matches this exact package dimension. Most other active substitutes use the narrower 0.154" width 14-SOIC package, which is physically compatible on standard PCB layouts but requires verification of board-level spacing constraints.

Automotive Applications: SN74AHC14QDRQ1 includes AEC-Q100 qualification for automotive-grade applications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74VHC14SJ with any of these substitute parts?

A: Yes, all listed parts are functionally equivalent inverter ICs with 6 Schmitt trigger channels. Electrical parameters (supply voltage, logic levels, propagation delay, output drive) are identical or superior. Physical package compatibility exists across all substitutes, though some use narrower 14-SOIC packages. Verify PCB layout spacing if switching between 0.209" and 0.154" width packages.

Q: What is the difference between 74VHC and 74AHC series?

A: Both series operate within the same 2V to 5.5V supply range and maintain identical logic function and pin configuration. The 74AHC series (Texas Instruments and Nexperia) typically offers lower quiescent current (1 µA vs. 2 µA) and extended temperature ranges. The 74VHC series (onsemi) is the original family. All are cross-compatible at the functional level.

Q: Which substitute has the best availability?

A: SN74AHC14MDREP shows the highest inventory (19,284 pcs) among active parts. SN74AHC14NSR and 74AHC14D,118 also maintain substantial stock levels (14,200 and 14,890 pcs respectively).

Q: Does package width affect PCB compatibility?

A: The 14-SOIC package exists in two widths: 0.209" (original 74VHC14SJ and SN74AHC14NSR) and 0.154" (most 74AHC variants). Both fit standard 14-pin SOIC footprints. Verify your PCB layout accommodates the narrower package if switching from the original, as some designs may have tighter spacing constraints.

Q: Are all substitutes RoHS compliant?

A: The original 74VHC14SJ does not specify RoHS status. All active substitute parts are ROHS3 compliant, meeting current environmental regulations for new designs and production.

Q: Can I use SN74AHC14QDRQ1 in non-automotive applications?

A: Yes. AEC-Q100 qualification is a superset requirement that ensures higher reliability standards. This part is suitable for any application requiring the 74AHC14 function.