SN74AHCT14D Equivalent & Substitute Parts

Part Overview

The SN74AHCT14D is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The SN74AHCT14D operates within the 4.5V to 5.5V supply voltage range and is suitable for digital logic applications requiring noise immunity through Schmitt trigger input conditioning.

Substiute Parts

SN74AHCT14D

Texas InstrumentsIn Stock: 2180SN74AHCT14D Datasheet

Current PartRFQ

SN74AHCT14DR

Texas InstrumentsIn Stock: 3378SN74AHCT14DR Datasheet

DirectRFQ

MC74VHCT14ADR2G

onsemiIn Stock: 3053MC74VHCT14ADR2G Datasheet

DirectRFQ

74AHCT14D,112

NXP SemiconductorsIn Stock: 8451474AHCT14D,112 Datasheet

UpgradeRFQ

74AHCT14D,118

NXP SemiconductorsIn Stock: 933774AHCT14D,118 Datasheet

UpgradeRFQ

74AHCT14D-Q100,118

Nexperia USA Inc.In Stock: 356074AHCT14D-Q100,118 Datasheet

UpgradeRFQ

74VHCT14D,118

NXP USA Inc.In Stock: 390074VHCT14D,118 Datasheet

UpgradeRFQ

74AHCT14S14-13

Diodes IncorporatedIn Stock: 120274AHCT14S14-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74AHCT14D is determined by the following critical parameters:

• Logic Type: Inverter with 6 channels and Schmitt trigger functionality
• Voltage Supply Range: 4.5V ~ 5.5V
• Output Drive Capability: 8mA high and low
• Input Logic Levels: Low 0.5V ~ 0.6V, High 1.9V ~ 2.1V
• Package: 14-SOIC surface mount form factor
• Propagation Delay: Maximum 8ns to 10ns at 5V with 50pF load
• RoHS3 Compliance and MSL Level 1

Substitute parts are grouped into three categories:

Direct Substitutes maintain identical electrical specifications and packaging, differing only in manufacturer or packaging format (tape & reel vs. tube).

Upgrade Substitutes provide the same core functionality with extended operating temperature ranges or automotive qualification, suitable for applications requiring enhanced reliability.

Manufacturer Recommended Substitutes offer equivalent functionality with minor parameter variations within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Active Status, Identical Specifications): SN74AHCT14DR is the primary direct substitute, manufactured by Texas Instruments with identical electrical specifications and operating temperature range. This part maintains full compatibility with the original SN74AHCT14D design and is currently in active production status.

For Extended Temperature Range Applications: MC74VHCT14ADR2G (onsemi) and 74VHCT14D,118 (NXP USA Inc.) extend the operating temperature range to -55°C ~ 125°C, suitable for industrial and automotive environments. MC74VHCT14ADR2G exhibits a slightly higher propagation delay of 9.6ns compared to the original 8ns specification.

For Automotive-Grade Applications: 74AHCT14D-Q100,118 (Nexperia USA Inc.) is qualified to AEC-Q100 automotive standards with an extended operating temperature range of -40°C ~ 125°C, maintaining the original 8ns propagation delay specification.

For Quiescent Current Considerations: 74AHCT14S14-13 (Diodes Incorporated) exhibits higher quiescent current at 20 µA maximum compared to 2 µA for the original part, with a slightly increased propagation delay of 10ns. This part is suitable for applications where quiescent current is not a critical design constraint.

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT14DR be used as a direct replacement for SN74AHCT14D? A: Yes. SN74AHCT14DR is manufactured by Texas Instruments with identical electrical specifications, operating temperature range (-40°C ~ 85°C), and 14-SOIC package. The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tube). Pin configuration and functional behavior are identical.

Q: What is the difference between 74AHCT14 and 74VHCT14 series parts? A: Both series provide 6-channel inverters with Schmitt trigger inputs in 14-SOIC packages. The 74VHCT14 series (MC74VHCT14ADR2G, 74VHCT14D,118) extends the operating temperature range to -55°C ~ 125°C and may have slightly different propagation delay characteristics. Electrical specifications for supply voltage, output drive, and input logic levels remain compatible.

Q: Is the 74AHCT14S14-13 from Diodes Incorporated a suitable substitute? A: The 74AHCT14S14-13 is functionally equivalent but exhibits higher quiescent current (20 µA vs. 2 µA) and slightly increased propagation delay (10ns vs. 8ns). It is suitable for applications where these parameter variations are acceptable. Extended operating temperature range (-40°C ~ 125°C) provides additional flexibility for temperature-sensitive designs.

Q: What packaging formats are available for substitutes? A: Substitutes are available in multiple packaging formats: Tube (original SN74AHCT14D), Cut Tape & Digi-Reel (SN74AHCT14DR), Tape & Reel (MC74VHCT14ADR2G, 74AHCT14D-Q100,118, 74AHCT14S14-13), and Bulk (NXP and Nexperia variants). Select packaging format based on production volume and supply chain requirements.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, consistent with the original SN74AHCT14D specifications.

Q: Which substitute is recommended for automotive applications? A: 74AHCT14D-Q100,118 (Nexperia USA Inc.) is qualified to AEC-Q100 automotive standards with extended operating temperature range (-40°C ~ 125°C) and maintains the original 8ns propagation delay specification.