74VHCT14AMTC Equivalent & Substitute Parts

Part Overview

The 74VHCT14AMTC is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in a 14-TSSOP surface mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The 74VHCT14AMTC operates within the 4.5V to 5.5V supply voltage range and is suitable for logic signal inversion applications requiring Schmitt trigger hysteresis.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Schmitt Trigger
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	8mA, 8mA
Input Logic Level - Low	0.5V ~ 0.6V
Input Logic Level - High	1.9V ~ 2.1V
Max Propagation Delay @ 5V, 50pF	9.6ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74VHCT14AMTC is determined by strict equivalence across the following critical parameters:

Logic Type: Inverter with 6 channels and Schmitt trigger functionality
Voltage Supply Range: 4.5V ~ 5.5V
Input/Output Logic Levels: Low 0.5V ~ 0.6V, High 1.9V ~ 2.1V
Output Current Capability: 8mA high and low
Quiescent Current: 2 µA maximum
Mounting Type: Surface Mount
Package Compatibility: 14-TSSOP or equivalent footprint

Substitute parts are categorized into two groups:

Upgrade Substitutes maintain identical electrical specifications with enhanced product status (Active vs. Obsolete) or extended operating temperature ranges (-55°C ~ 125°C).

Similar Substitutes provide functional equivalence with minor variations in propagation delay (8ns vs. 9.6ns) or package variants (14-SSOP, 14-TVSOP) that maintain electrical compatibility within the specified parameter ranges.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage Supply	Quiescent Current (Max)	Output Current (High/Low)	Propagation Delay @ 5V, 50pF	Operating Temperature	Package	Product Status
74VHCT14AMTC	onsemi	74VHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	9.6ns	-40°C ~ 85°C	14-TSSOP	Obsolete
MC74VHCT14ADTR2G	onsemi	74VHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	9.6ns	-55°C ~ 125°C	14-TSSOP	Active
NLV74VHCT14ADTR2G	onsemi	74VHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	9.6ns	-55°C ~ 125°C	14-TSSOP	Obsolete
74AHCT14PW,118	Nexperia USA Inc.	74AHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-40°C ~ 125°C	14-TSSOP	Active
74VHCT14PW,118	NXP USA Inc.	74VHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-40°C ~ 125°C	14-TSSOP	Active
SN74AHCT14DBR	Texas Instruments	74AHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-40°C ~ 85°C	14-SSOP	Active
SN74AHCT14DGVR	Texas Instruments	74AHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-40°C ~ 85°C	14-TVSOP	Active
SN74AHCT14MPWREP	Texas Instruments	74AHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-55°C ~ 125°C	14-TSSOP	Active
SN74AHCT14PW	Texas Instruments	74AHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-40°C ~ 85°C	14-TSSOP	Discontinued at DiGi Electronics
SN74AHCT14PWR	Texas Instruments	74AHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-40°C ~ 85°C	14-TSSOP	Active
SN74AHCT14QPWRG4Q1	Texas Instruments	74AHCT	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-40°C ~ 125°C	14-TSSOP	Active

Engineering Selection Recommendations

Primary Upgrade Path: MC74VHCT14ADTR2G is the direct upgrade substitute from onsemi. It maintains identical electrical specifications and package footprint while offering Active product status and extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C). This part is suitable for applications requiring long-term availability and wider temperature operation.

Cross-Manufacturer Alternatives: The 74AHCT14 series from Nexperia and Texas Instruments provides functional equivalence with improved propagation delay (8ns vs. 9.6ns). These parts are widely available in Active status across multiple packaging options. SN74AHCT14PWR from Texas Instruments offers the highest inventory availability (230,810 pcs) in 14-TSSOP packaging with identical electrical performance.

Automotive-Grade Options: SN74AHCT14QPWRG4Q1 (Texas Instruments) and NLV74VHCT14ADTR2G (onsemi) are AEC-Q100 qualified for automotive applications, providing extended temperature range (-55°C ~ 125°C) with Schmitt trigger functionality.

Package Considerations: SN74AHCT14DBR uses 14-SSOP packaging (0.209" width vs. 0.173" for TSSOP), requiring PCB layout verification. SN74AHCT14DGVR uses 14-TVSOP packaging, both maintaining electrical compatibility but requiring footprint confirmation before substitution.

Frequently Asked Questions (FAQ)

Q: Can I substitute 74VHCT14AMTC with any 74AHCT14 variant?

A: Yes, provided the 74AHCT14 variant maintains the specified electrical parameters: 4.5V ~ 5.5V supply voltage, 2 µA quiescent current, 8mA output current, and Schmitt trigger input characteristics. All listed 74AHCT14 parts meet these criteria. Package footprint must be verified for PCB compatibility.

Q: What is the difference between 74VHCT and 74AHCT series?

A: Both series provide identical logic functionality and electrical specifications for this inverter application. The primary difference is propagation delay: 74VHCT14AMTC specifies 9.6ns while 74AHCT14 variants specify 8ns at 5V with 50pF load. This faster switching in 74AHCT14 is compatible with 74VHCT14AMTC applications.

Q: Is MC74VHCT14ADTR2G a direct replacement for 74VHCT14AMTC?

A: MC74VHCT14ADTR2G is a direct electrical and mechanical replacement with identical specifications and 14-TSSOP footprint. It offers improved product status (Active vs. Obsolete) and extended operating temperature range (-55°C ~ 125°C).

Q: What does AEC-Q100 qualification mean for SN74AHCT14QPWRG4Q1?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability standards. This certification is relevant only for automotive applications. For non-automotive use, standard industrial-grade parts provide equivalent functionality.

Q: Can I use SN74AHCT14DGVR as a substitute if my PCB is designed for 14-TSSOP?

A: SN74AHCT14DGVR uses 14-TVSOP packaging with different physical dimensions (0.173" width, same as TSSOP, but different pin configuration). PCB footprint compatibility must be verified before substitution. If your design requires 14-TSSOP specifically, use parts explicitly listed in that package.

Q: Why does 74VHCT14PW,118 from NXP show faster propagation delay than 74VHCT14AMTC?

A: Both parts are 74VHCT series inverters with identical electrical specifications. The 8ns propagation delay specification for 74VHCT14PW,118 is within acceptable tolerance for the same functional class and does not indicate incompatibility. Both parts operate identically in logic applications.

Q: Is inventory availability a factor in selecting a substitute?

A: Inventory levels are provided for reference but should not be the primary selection criterion. Engineering compatibility based on electrical parameters, package footprint, and product status takes precedence. SN74AHCT14PWR has the highest inventory (230,810 pcs) and is Active status, making it a reliable long-term source.

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