74VHC14MTC Equivalent & Substitute Parts

Part Overview

The 74VHC14MTC is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in 14-TSSOP surface mount packaging. This part is currently obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The 74VHC14 logic family provides CMOS-based signal inversion with hysteresis characteristics suitable for digital logic circuits operating across 2V to 5.5V supply ranges.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Schmitt Trigger
Voltage Supply Range	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	10.6ns @ 5V, 50pF
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74VHC14MTC is determined by strict electrical and mechanical compatibility across the following criteria:

Core Substitution Parameters:

Logic Type: Inverter with 6 channels, 1 input per channel
Schmitt Trigger feature requirement
Voltage supply range: 2V ~ 5.5V minimum
Output current capability: 8mA minimum for both high and low states
Input logic thresholds: Low 0.9V ~ 1.65V, High 2.2V ~ 3.85V
Propagation delay: 10.6ns @ 5V, 50pF maximum
Package: 14-TSSOP surface mount only
RoHS3 compliance and MSL 1 rating

Acceptable Variations:

Operating temperature range may extend beyond the original -40°C ~ 85°C specification
Quiescent current may be lower than 2 µA maximum
Packaging format (Tube, Tape & Reel, Cut Tape) does not affect electrical compatibility
Automotive grade and AEC-Q100 qualification are enhancements, not requirements

All substitute parts listed maintain identical electrical performance within the specified parameters while offering improved product status or extended temperature ratings.

Parameter Comparison

Part Number	Manufacturer	Product Status	Operating Temp	Quiescent Current	Packaging	Grade
74VHC14MTC	onsemi	Obsolete	-40°C ~ 85°C	2 µA	Tube	Standard
74VHC14YTTR	STMicroelectronics	Active	-40°C ~ 125°C	2 µA	Tape & Reel	Automotive / AEC-Q100
SN74AHC14PW	Texas Instruments	Discontinued at DiGi Electronics	-40°C ~ 125°C	1 µA	Tube	Standard
SN74AHC14PWR	Texas Instruments	Active	-40°C ~ 125°C	2 µA	Cut Tape & Digi-Reel	Standard
SN74AHC14PWRG3	Texas Instruments	Active	-40°C ~ 125°C	2 µA	Tape & Reel	Standard
74AHC14PW,118	NXP Semiconductors	Active	Not specified	Not specified	Not specified	Standard
74AHC14PW-Q100,118	Nexperia USA Inc.	Active	-40°C ~ 125°C	2 µA	Tape & Reel	Automotive / AEC-Q100
74VHC14PW,118	Nexperia USA Inc.	Active	-40°C ~ 125°C	2 µA	Tape & Reel	Standard
SN74AHC14MPWREP	Texas Instruments	Active	-55°C ~ 125°C	2 µA	Tape & Reel	Standard
SN74AHC14QPWRG4Q1	Texas Instruments	Active	-40°C ~ 125°C	2 µA	Tape & Reel	Automotive / AEC-Q100
SN74AHC14QPWRQ1	Texas Instruments	Active	-40°C ~ 125°C	2 µA	Tape & Reel	Automotive / AEC-Q100

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

For direct replacement of the obsolete 74VHC14MTC, select from parts with Active product status and identical 74VHC series designation: 74VHC14YTTR (STMicroelectronics) or 74VHC14PW,118 (Nexperia USA Inc.). Both maintain the 74VHC logic family, support extended operating temperature to 125°C, and carry ROHS3 compliance with MSL 1 rating.

Secondary Substitutes (74AHC Series):

The 74AHC14 series from Texas Instruments and Nexperia provides full electrical equivalence with identical Schmitt trigger inverter functionality. Active parts include SN74AHC14PWR, SN74AHC14PWRG3, SN74AHC14MPWREP, and automotive-qualified variants SN74AHC14QPWRG4Q1 and SN74AHC14QPWRQ1. All support -40°C to 125°C operating range and ROHS3 compliance.

Automotive Applications:

For designs requiring automotive-grade components with AEC-Q100 qualification, select 74VHC14YTTR, 74AHC14PW-Q100,118, SN74AHC14QPWRG4Q1, or SN74AHC14QPWRQ1. These parts carry formal automotive qualification while maintaining identical electrical specifications.

Extended Temperature Range:

SN74AHC14MPWREP extends the lower operating limit to -55°C, suitable for applications requiring enhanced cold-temperature performance beyond the standard -40°C minimum.

Frequently Asked Questions (FAQ)

Q: Can I use a 74AHC14 series part as a direct replacement for the 74VHC14MTC?

A: Yes. The 74AHC14 series maintains identical logic function, Schmitt trigger characteristics, output current ratings, and propagation delay specifications. All electrical parameters remain compatible within the specified operating ranges. The primary difference is extended operating temperature capability (-40°C to 125°C versus -40°C to 85°C).

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

A: Both series provide equivalent inverter logic with Schmitt trigger inputs and identical electrical performance at the specified parameters. The 74AHC series offers extended temperature range to 125°C. Selection between series depends on application temperature requirements and manufacturer availability.

Q: Does packaging format affect electrical compatibility?

A: No. Tube, Tape & Reel, and Cut Tape packaging formats are logistics variations only. All formats maintain identical electrical specifications and 14-TSSOP physical dimensions. Selection should be based on procurement and assembly process requirements.

Q: Are automotive-qualified parts required for non-automotive applications?

A: No. Automotive-qualified parts (AEC-Q100) are enhancements providing additional qualification testing and reliability assurance. Standard-grade parts are fully compatible for non-automotive applications meeting the specified electrical parameters.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life without moisture bake-out requirements. This applies to all listed substitute parts and the original 74VHC14MTC.

Q: Can I substitute a part with lower quiescent current?

A: Yes. Lower quiescent current (such as 1 µA in SN74AHC14PW) represents improved power efficiency and is fully compatible. The 2 µA specification is a maximum rating; lower values maintain full compatibility.

Q: Is ROHS3 compliance required for all substitutes?

A: All listed substitute parts carry ROHS3 compliance matching the original 74VHC14MTC specification. This ensures consistency with environmental and regulatory requirements.

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