TL331SN4T3G Equivalent & Substitute Parts

Part Overview

The TL331SN4T3G is a general-purpose comparator IC manufactured by onsemi, packaged in 5-TSOP (SOT-23-5) surface mount configuration. This device operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), with a maximum input offset voltage of 5mV at 5V and typical output current of 16mA at 5V. The part carries a "Not For New Designs" product status, making identification of functionally equivalent alternatives essential for ongoing production and design updates.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Category	Linear Comparator
Type	General Purpose
Number of Elements	1
Voltage Supply Range (Single/Dual)	2V ~ 36V, ±1V ~ 18V
Input Offset Voltage (Max)	5mV @ 5V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V
Quiescent Current (Max)	1.25mA
Propagation Delay (Max)	850ns (Typ)
Operating Temperature	-40°C ~ 125°C
Package / Case	SOT-23-5 Thin, TSOT-23-5
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the TL331SN4T3G is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Supply voltage range must encompass or match the 2V ~ 36V (single) or ±1V ~ ±18V (dual) specification
Input offset voltage must not exceed 5mV at the specified test voltage
Input bias current must not exceed 0.25µA at 5V
Output current capability must support the application requirement (minimum 16mA at 5V for direct replacement)
Quiescent current must remain within acceptable power budget constraints
Operating temperature range must cover -40°C to 125°C minimum

Mechanical Compatibility Criteria:

Package type must be SOT-23-5 or functionally equivalent pinout (SC-74A, SOT-753)
Surface mount configuration required
Moisture sensitivity level MSL 1 preferred for unlimited shelf life

Compliance Requirements:

RoHS3 compliance mandatory
REACH compliance status documented

Substitute parts are grouped into two categories: direct pin-compatible replacements in SOT-23-5 packaging, and functional equivalents in alternative small-outline packages (SC-70-5, 8-SOIC) that require PCB layout modification but maintain electrical performance within specification.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	Product Status	RoHS
TL331SN4T3G	onsemi	SOT-23-5	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1.25mA	-40°C ~ 125°C	Not For New Designs	ROHS3
LMV331M5/NOPB	Texas Instruments	SOT-23-5	2.7V~5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	120µA	-40°C ~ 85°C	Active	ROHS3
LMV331M7X/NOPB	Texas Instruments	SC-70-5	2.7V~5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	120µA	-40°C ~ 85°C	Active	ROHS3
MIC6270YM5-TR	Microchip Technology	SOT-23-5	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	20mA @ 5V	1.2mA	-40°C ~ 85°C	Active	ROHS3
TA75S393F,LF	Toshiba Semiconductor and Storage	SMV	2V~36V, ±1V~18V	5mV @ 5V	0.05µA @ 5V	16mA @ 5V	800µA	-40°C ~ 85°C	Active	ROHS3
TL331IDBVRQ1	Texas Instruments	SOT-23-5	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	700µA	-40°C ~ 85°C	Active	ROHS3
TL331KDBVR	Texas Instruments	SOT-23-5	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	700µA	-40°C ~ 105°C	Active	ROHS3
TS391AILT	STMicroelectronics	SOT-23-5	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	1.25mA	-40°C ~ 125°C	Active	ROHS3
LM6511IM	Texas Instruments	8-SOIC	2.5V~30V	5mV @ 2.7V	0.13µA @ 2.7V	—	4.6mA	-40°C ~ 85°C	Last Time Buy	ROHS3
LMV331W5-7	Diodes Incorporated	SOT-25	2.7V~5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	200µA	-40°C ~ 125°C	Active	ROHS3

Engineering Selection Recommendations

Direct Pin-Compatible Replacements (SOT-23-5 Package):

TS391AILT (STMicroelectronics) provides the closest functional match to TL331SN4T3G. Both devices share identical supply voltage range (2V~36V, ±1V~18V), input offset voltage (5mV @ 30V), input bias current (0.25µA @ 5V), output current (16mA @ 5V), and quiescent current (1.25mA). TS391AILT maintains the full operating temperature range (-40°C ~ 125°C) and carries Active product status with ROHS3 compliance. This part requires no PCB layout modification.

TL331KDBVR (Texas Instruments) offers Active status with matching supply voltage range, input specifications, and SOT-23-5 packaging. Operating temperature extends to 105°C. Output current is specified at 20mA, providing additional margin. This part is suitable for applications not requiring the full 125°C upper temperature limit.

MIC6270YM5-TR (Microchip Technology) matches the supply voltage range and input offset voltage of the original part. Output current is 20mA at 5V, exceeding the 16mA requirement. Quiescent current is 1.2mA, within specification. Active product status and ROHS3 compliance are confirmed. Operating temperature range is -40°C ~ 85°C.

Alternative Package Options:

LMV331M5/NOPB (Texas Instruments) in SOT-23-5 packaging provides Active status but operates within a narrower supply voltage range (2.7V~5.5V). This part is suitable only for applications operating within this voltage window. Input offset voltage is 7mV, exceeding the 5mV specification of the original part.

LMV331M7X/NOPB (Texas Instruments) in SC-70-5 packaging shares electrical characteristics with LMV331M5/NOPB but requires PCB layout modification due to different pinout. SC-70-5 is a smaller package suitable for space-constrained applications.

LMV331W5-7 (Diodes Incorporated) in SOT-25 packaging maintains the full operating temperature range (-40°C ~ 125°C) and Active product status. Supply voltage range is limited to 2.7V~5.5V. MSL rating is 3 (168 hours), requiring controlled storage conditions compared to MSL 1 of the original part.

Not Recommended for Direct Substitution:

LM6511IM (Texas Instruments) in 8-SOIC packaging carries Last Time Buy status, indicating end-of-life trajectory. While electrical parameters are compatible, the larger package footprint requires significant PCB redesign.

TA75S393F,LF (Toshiba) in SMV package matches electrical specifications but requires PCB layout modification. Operating temperature is limited to -40°C ~ 85°C.

Frequently Asked Questions (FAQ)

Q: Can LMV331M5/NOPB replace TL331SN4T3G in all applications?

A: LMV331M5/NOPB is suitable only for applications operating within 2.7V to 5.5V supply voltage range. The original TL331SN4T3G supports 2V to 36V (single supply) or ±1V to ±18V (dual supply). If your application requires operation outside the 2.7V~5.5V window, LMV331M5/NOPB is not compatible. Additionally, input offset voltage is specified at 7mV versus 5mV for the original part.

Q: What is the difference between SOT-23-5 and SC-70-5 packages?

A: Both packages contain five pins with identical electrical pinout (pin-compatible), but SC-70-5 is physically smaller. LMV331M7X/NOPB in SC-70-5 requires PCB layout modification compared to SOT-23-5 variants. Pin spacing and component footprint differ, necessitating updated PCB artwork.

Q: Why is TS391AILT recommended as the primary substitute?

A: TS391AILT matches all critical electrical parameters of TL331SN4T3G: supply voltage range (2V~36V, ±1V~18V), input offset voltage (5mV), input bias current (0.25µA @ 5V), output current (16mA @ 5V), quiescent current (1.25mA), and operating temperature range (-40°C ~ 125°C). The part carries Active product status, ensuring long-term availability. SOT-23-5 packaging is identical, requiring no PCB modification.

Q: What does "Not For New Designs" product status mean?

A: "Not For New Designs" indicates the manufacturer is no longer recommending this part for new circuit designs. Existing inventory may remain available, but the manufacturer provides no guarantee of continued production or support. Substitute parts with Active status are recommended for new designs and ongoing production.

Q: Can I use MIC6270YM5-TR if my application requires 125°C operation?

A: MIC6270YM5-TR operates only to 85°C maximum. If your application requires operation at temperatures above 85°C up to 125°C, this part is not suitable. TS391AILT or LMV331W5-7 support the full 125°C upper temperature limit.

Q: What is the significance of MSL (Moisture Sensitivity Level) rating?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions and can be stored indefinitely without special handling. MSL 3 (168 hours) requires controlled storage conditions and limits shelf life to 168 hours after package opening unless baked. TL331SN4T3G carries MSL 1; LMV331W5-7 carries MSL 3, requiring more stringent inventory management.

Q: Is LM6511IM a viable substitute despite 8-SOIC packaging?

A: LM6511IM carries Last Time Buy status, indicating the manufacturer is discontinuing this part. While electrical parameters are compatible, the larger 8-SOIC package requires complete PCB redesign. New designs should avoid this part. Existing designs using LM6511IM should transition to TS391AILT or TL331KDBVR.

Q: What output current specification should I use for design calculations?

A: TL331SN4T3G specifies 16mA typical output current at 5V. Substitute parts vary: TS391AILT matches at 16mA, while MIC6270YM5-TR and TL331KDBVR provide 20mA. Use the specified value for your selected substitute part. Higher output current provides additional design margin but does not affect compatibility if your application requires only 16mA.

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