74VHC14MX Equivalent & Substitute Parts

Part Overview

The 74VHC14MX is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74VHC14MX operates across a 2V to 5.5V supply voltage range with Schmitt trigger functionality for noise immunity in digital logic applications. Substitute parts maintain functional equivalence through identical logic configuration, electrical characteristics, and package compatibility while offering active product status and extended availability.

Key Parameters

Parameter	Specification
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Schmitt Trigger
Voltage - Supply	2V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	8mA, 8mA
Input Logic Level - Low	0.9V ~ 1.65V
Input Logic Level - High	2.2V ~ 3.85V
Max Propagation Delay @ 5V, 50pF	10.6ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74VHC14MX are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain identical logic configuration (6-channel inverter with Schmitt trigger), supply voltage range (2V ~ 5.5V), output current capability (8mA), and propagation delay (10.6ns @ 5V, 50pF). Quiescent current specifications remain at or below 2 µA maximum.

Input Logic Levels: All substitutes maintain the same input logic level thresholds (Low: 0.9V ~ 1.65V, High: 2.2V ~ 3.85V), ensuring direct functional replacement in existing circuits.

Package Compatibility: All substitute parts use 14-SOIC or 14-SO surface mount packaging with identical 0.154" (3.90mm) width, allowing direct PCB footprint compatibility.

Compliance & Certification: All parts maintain ROHS3 compliance and MSL 1 rating. Automotive-qualified variants (AEC-Q100) are identified separately for applications requiring automotive-grade components.

Product Status: Substitute parts are selected from active product lines to ensure long-term availability and supply chain continuity.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Voltage - Supply	Current - Quiescent (Max)	Operating Temperature	Package	Packaging Type
74VHC14MX	onsemi	74VHC	Obsolete	2V ~ 5.5V	2 µA	-40°C ~ 85°C	14-SOIC	Cut Tape (CT) & Digi-Reel®
MC74VHC14DR2G	onsemi	74VHC	Active	2V ~ 5.5V	2 µA	-55°C ~ 125°C	14-SOIC	Tape & Reel (TR)
74VHC14YMTR	STMicroelectronics	74VHC	Active	2V ~ 5.5V	2 µA	-40°C ~ 125°C	14-SOIC	Tape & Reel (TR)
SN74AHC14D	Texas Instruments	74AHC	Discontinued at DiGi Electronics	2V ~ 5.5V	1 µA	-40°C ~ 125°C	14-SOIC	-
SN74AHC14DR	Texas Instruments	74AHC	Active	2V ~ 5.5V	2 µA	-40°C ~ 125°C	14-SOIC	Cut Tape (CT) & Digi-Reel®
SN74AHC14DRG3	Texas Instruments	74AHC	Active	2V ~ 5.5V	2 µA	-40°C ~ 125°C	14-SOIC	Tape & Reel (TR)
74AHC14D,118	Nexperia USA Inc.	74AHC	Active	2V ~ 5.5V	2 µA	-40°C ~ 125°C	14-SOIC	Cut Tape (CT) & Digi-Reel®
74AHC14D-Q100,118	Nexperia USA Inc.	74AHC	Active	2V ~ 5.5V	2 µA	-40°C ~ 125°C	14-SOIC	Tape & Reel (TR)
74VHC14D,118	Nexperia USA Inc.	74VHC	Active	2V ~ 5.5V	2 µA	-40°C ~ 125°C	14-SOIC	Tape & Reel (TR)
SN74AHC14MDREP	Texas Instruments	74AHC	Active	2V ~ 5.5V	2 µA	-55°C ~ 125°C	14-SOIC	Tape & Reel (TR)
SN74AHC14QDRQ1	Texas Instruments	74AHC	Active	2V ~ 5.5V	2 µA	-40°C ~ 125°C	14-SOIC	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Substitutes (Same Series - 74VHC):

MC74VHC14DR2G and 74VHC14D,118 maintain the 74VHC series designation and are direct functional equivalents. MC74VHC14DR2G extends the operating temperature range to -55°C ~ 125°C and is available in active production status. 74VHC14D,118 from Nexperia provides equivalent specifications with active product status and extended temperature range support.

Secondary Substitutes (74AHC Series):

SN74AHC14DR, SN74AHC14DRG3, SN74AHC14MDREP, and 74AHC14D,118 represent the 74AHC logic family. These parts maintain electrical equivalence with identical supply voltage, output current, and propagation delay specifications. SN74AHC14DR and SN74AHC14DRG3 from Texas Instruments are in active production. SN74AHC14MDREP extends the operating temperature range to -55°C ~ 125°C. 74AHC14D,118 from Nexperia provides equivalent performance in active status.

Automotive-Qualified Options:

74AHC14D-Q100,118 and SN74AHC14QDRQ1 carry AEC-Q100 automotive qualification. These parts are suitable for applications requiring automotive-grade component certification while maintaining full electrical equivalence.

Packaging Considerations:

Cut Tape (CT) & Digi-Reel® packaging is available from SN74AHC14DR and 74AHC14D,118 for applications requiring individual component handling. Tape & Reel (TR) packaging is available from all other substitutes for high-volume production environments.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74VHC14MX with any of these substitute parts?

A: Yes. All listed substitute parts maintain identical electrical specifications for logic type, circuit count, supply voltage range, output current, input logic levels, and propagation delay. Package footprints are compatible (14-SOIC with 0.154" width). Direct PCB substitution is supported without circuit modification.

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

A: Both series maintain identical electrical performance for this inverter Schmitt trigger function. The primary difference is manufacturer and product line designation. 74VHC parts are sourced from onsemi and Nexperia. 74AHC parts are sourced from Texas Instruments and Nexperia. All meet the same functional and compliance requirements.

Q: Which substitute offers the widest operating temperature range?

A: MC74VHC14DR2G, SN74AHC14MDREP, and 74AHC14D-Q100,118 extend the operating temperature range to -55°C ~ 125°C, compared to the original 74VHC14MX specification of -40°C ~ 85°C. These parts are suitable for extended temperature applications.

Q: Are automotive-qualified versions available?

A: Yes. 74AHC14D-Q100,118 and SN74AHC14QDRQ1 carry AEC-Q100 automotive qualification. These parts maintain full electrical equivalence while meeting automotive-grade component standards.

Q: What packaging options are available?

A: Cut Tape (CT) & Digi-Reel® packaging is available from SN74AHC14DR and 74AHC14D,118. Tape & Reel (TR) packaging is available from MC74VHC14DR2G, 74VHC14YMTR, SN74AHC14DRG3, 74VHC14D,118, SN74AHC14MDREP, SN74AHC14QDRQ1, and 74AHC14D-Q100,118. Select packaging based on production volume and handling requirements.

Q: Is the quiescent current specification critical for my application?

A: The 74VHC14MX specifies 2 µA maximum quiescent current. SN74AHC14D specifies 1 µA maximum, which is lower and provides improved power efficiency. All other substitutes maintain the 2 µA specification. For low-power applications, SN74AHC14D offers superior performance, though it is discontinued at DiGi Electronics.

Q: Do all substitutes maintain ROHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original 74VHC14MX specifications.

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