74V1T14STR Equivalent & Substitute Parts

Part Overview

The 74V1T14STR is a single-channel inverter logic IC with Schmitt trigger functionality manufactured by STMicroelectronics in SOT-23-5 surface mount packaging. This component operates within the 4.5V to 5.5V supply voltage range and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production and legacy system support.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	1
Number of Inputs	1
Features	Schmitt Trigger
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	8mA, 8mA
Input Logic Level - Low	0.5V ~ 0.6V
Input Logic Level - High	2V
Max Propagation Delay @ 5V, 50pF	8.5ns
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74V1T14STR is determined by electrical and mechanical parameter compatibility. All substitute parts must satisfy the following criteria:

Electrical Compatibility Requirements:

Logic Type: Inverter with single channel, single input configuration
Schmitt Trigger functionality
Supply voltage range: 4.5V ~ 5.5V minimum
Output current capability: 8mA minimum for both high and low states
Input logic levels compatible with 0.5V ~ 0.6V low threshold and 2V high threshold
Propagation delay: 8.5ns or faster at 5V with 50pF load
Operating temperature range: -55°C to 125°C or compatible subset

Mechanical Compatibility Requirements:

Surface mount packaging
SOT-23-5 or equivalent package footprint (SC-74A, SOT-753)
ROHS3 compliance
MSL rating of 1 (Unlimited)

Substitute parts are grouped into two categories: Direct Substitutes (identical electrical and mechanical specifications with active product status) and Similar Substitutes (equivalent electrical performance with alternative packaging or extended supply voltage ranges).

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Supply Voltage	Quiescent Current (Max)	Output Current (High/Low)	Propagation Delay @ 5V, 50pF	Operating Temperature	Package
74V1T14STR	STMicroelectronics	74V	Obsolete	4.5V ~ 5.5V	1 µA	8mA, 8mA	8.5ns	-55°C ~ 125°C	SOT-23-5
SN74AHCT1G14DBVR	Texas Instruments	74AHCT	Active	4.5V ~ 5.5V	1 µA	8mA, 8mA	8ns	-40°C ~ 125°C	SOT-23-5
74AHCT1G14GV,125	Nexperia USA Inc.	74AHCT	Active	4.5V ~ 5.5V	1 µA	8mA, 8mA	8.5ns	-40°C ~ 125°C	SC-74A
74AHCT1G14GW,125	Nexperia USA Inc.	74AHCT	Active	4.5V ~ 5.5V	1 µA	8mA, 8mA	8.5ns	-40°C ~ 125°C	5-TSSOP
74AHCT1G14W5-7	Diodes Incorporated	74AHCT	Active	4.5V ~ 5.5V	2 µA	8mA, 8mA	8ns	-40°C ~ 125°C	SOT-25
M74VHC1GT14DTT1G	onsemi	74VHC	Obsolete	2V ~ 5.5V	1 µA	8mA, 8mA	10.6ns	-55°C ~ 125°C	5-TSOP
SN74AHCT1G14DBVT	Texas Instruments	74AHCT	Obsolete	4.5V ~ 5.5V	1 µA	8mA, 8mA	8ns	-40°C ~ 125°C	SOT-23-5
SN74AHCT1G14DCKR	Texas Instruments	74AHCT	Active	4.5V ~ 5.5V	1 µA	8mA, 8mA	8ns	-40°C ~ 125°C	SC-70-5
SN74AHCT1G14DCKT	Texas Instruments	74AHCT	Discontinued at DiGi Electronics	4.5V ~ 5.5V	1 µA	8mA, 8mA	8ns	-40°C ~ 125°C	SC-70-5

Engineering Selection Recommendations

Primary Recommendation for Direct Substitution:

The SN74AHCT1G14DBVR (Texas Instruments) is the optimal direct substitute for the 74V1T14STR. This part maintains identical electrical specifications within the 4.5V to 5.5V supply range, matches the 8mA output current capability, and is packaged in SOT-23-5 format. The SN74AHCT1G14DBVR holds active product status with 92,300 units in stock, ensuring long-term availability. Both parts are ROHS3 compliant with MSL rating of 1.

Alternative Substitutes by Package Type:

For applications where alternative packaging is acceptable, the 74AHCT1G14GV,125 (Nexperia USA Inc.) in SC-74A package or SN74AHCT1G14DCKR (Texas Instruments) in SC-70-5 package provide equivalent electrical performance with active product status. The 74AHCT1G14GW,125 (Nexperia USA Inc.) in 5-TSSOP package is suitable for space-constrained designs.

Extended Supply Voltage Option:

The M74VHC1GT14DTT1G (onsemi) supports an extended supply voltage range of 2V to 5.5V, providing additional design flexibility for applications requiring lower voltage operation. However, this part is classified as obsolete and should be selected only when the extended voltage range is a critical requirement.

Compatibility Considerations:

All recommended active substitutes maintain the Schmitt trigger feature, single-channel inverter configuration, and surface mount mounting type. Operating temperature ranges for 74AHCT series parts are limited to -40°C to 125°C compared to the 74V1T14STR range of -55°C to 125°C. Applications requiring operation below -40°C must select the M74VHC1GT14DTT1G or verify that the reduced lower temperature limit is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the SN74AHCT1G14DBVR directly replace the 74V1T14STR without circuit modifications?

A: Yes. The SN74AHCT1G14DBVR is electrically and mechanically compatible with the 74V1T14STR. Both parts operate within the 4.5V to 5.5V supply range, provide 8mA output current, and are packaged in SOT-23-5 format. No circuit modifications are required for direct substitution.

Q: What is the difference between SOT-23-5 and SC-74A packaging?

A: SOT-23-5 and SC-74A are equivalent package designations for the same physical form factor. Both refer to a 5-pin surface mount package with identical pin spacing and dimensions. Parts specified with either designation are mechanically interchangeable.

Q: Why does the 74AHCT1G14W5-7 have a maximum quiescent current of 2 µA instead of 1 µA?

A: The 74AHCT1G14W5-7 (Diodes Incorporated) specifies a maximum quiescent current of 2 µA, which is within acceptable tolerance for most applications. This represents a minor variation in manufacturing specifications while maintaining functional equivalence. The part remains suitable for substitution in applications where the 1 µA specification is not a critical design constraint.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance status of the 74V1T14STR.

Q: What is the significance of the operating temperature range difference between 74V and 74AHCT series?

A: The 74V1T14STR operates from -55°C to 125°C, while most 74AHCT series substitutes operate from -40°C to 125°C. Applications requiring operation below -40°C must either select the M74VHC1GT14DTT1G or confirm that the reduced lower temperature limit is acceptable for the intended application.

Q: Can the M74VHC1GT14DTT1G be used in applications designed for 4.5V to 5.5V operation?

A: Yes. The M74VHC1GT14DTT1G supports the 4.5V to 5.5V supply range and is electrically compatible. The extended lower voltage range of 2V to 5.5V provides additional flexibility without compromising performance in standard 5V applications. However, this part is classified as obsolete and should be selected only when the extended voltage range provides a specific design advantage.

Q: What packaging options are available for equivalent substitutes?

A: Substitute parts are available in multiple surface mount packages: SOT-23-5 (SN74AHCT1G14DBVR, SN74AHCT1G14DBVT), SC-74A (74AHCT1G14GV,125), 5-TSSOP (74AHCT1G14GW,125), SC-70-5 (SN74AHCT1G14DCKR, SN74AHCT1G14DCKT), SOT-25 (74AHCT1G14W5-7), and 5-TSOP (M74VHC1GT14DTT1G). Package selection depends on PCB layout requirements and available board space.

Q: Which substitute part has the fastest propagation delay?

A: The SN74AHCT1G14DBVR and SN74AHCT1G14DCKR (Texas Instruments) and 74AHCT1G14W5-7 (Diodes Incorporated) all specify 8ns propagation delay at 5V with 50pF load, which is faster than the 74V1T14STR specification of 8.5ns. The M74VHC1GT14DTT1G specifies 10.6ns, which is acceptable for most applications but represents a slight performance trade-off.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message