TL331IDBVR Equivalent & Substitute Parts

Part Overview

The TL331IDBVR is a general-purpose comparator IC manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-element comparator features open-collector, rail-to-rail output architecture and operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). The device maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified to support design flexibility, inventory optimization, and supply chain continuity while maintaining functional and electrical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V	V
Voltage - Input Offset (Max)	5mV @ 30V	mV
Current - Input Bias (Max)	0.25µA @ 5V	µA
Current - Output (Typ)	20mA	mA
Current - Quiescent (Max)	700µA	µA
Operating Temperature	-40°C ~ 85°C	°C
Package / Case	SC-74A, SOT-753	—
Output Type	Open-Collector, Rail-to-Rail	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TL331IDBVR are classified into two categories based on electrical and mechanical compatibility:

MFR Recommended Substitutes maintain identical or superior electrical specifications and are directly interchangeable without circuit modification:

LM397MF/NOPB and LM397MFX/NOPB (Texas Instruments)
AP331AWG-7 (Diodes Incorporated)
MIC6270YM5-TR (Microchip Technology)
TA75S393F,LF (Toshiba Semiconductor and Storage)
TS391AILT and TS391RILT (STMicroelectronics)

Parametric Equivalents share identical core electrical characteristics and are functionally equivalent:

TL331IDBVRQ1 (automotive-grade variant with AEC-Q100 qualification)
TL331IDBVT (commercial-grade variant)

Substitution eligibility is determined by the following critical parameters: supply voltage range compatibility, input offset voltage tolerance, input bias current, output current capability, quiescent current, operating temperature range, package form factor (SOT-23-5 or SOT-25), output type (open-collector), and compliance certifications (RoHS3, REACH).

Parameter Comparison

Part Number	Manufacturer	Supply Voltage (V)	Input Offset Max (mV)	Input Bias Max (µA)	Output Current Typ (mA)	Quiescent Current Max (µA)	Temp Range (°C)	Package	Output Type
TL331IDBVR	Texas Instruments	2–36 / ±1–18	5 @ 30V	0.25 @ 5V	20	700	-40 to 85	SOT-23-5	Open-Collector, Rail-to-Rail
LM397MF/NOPB	Texas Instruments	5–30 / ±2.5–15	7 @ 30V	0.25 @ 5V	13 @ 5V	2000	-40 to 85	SOT-23-5	Open-Collector, Rail-to-Rail
LM397MFX/NOPB	Texas Instruments	5–30 / ±2.5–15	7 @ 30V	0.25 @ 5V	13 @ 5V	2000	-40 to 85	SOT-23-5	Open-Collector, Rail-to-Rail
TL331IDBVRQ1	Texas Instruments	2–36 / ±1–18	5 @ 30V	0.25 @ 5V	20	700	-40 to 85	SOT-23-5	Open-Collector, Rail-to-Rail
TL331IDBVT	Texas Instruments	2–36 / ±1–18	5 @ 30V	0.25 @ 5V	20	700	-40 to 85	SOT-23-5	Open-Collector, Rail-to-Rail
AP331AWG-7	Diodes Incorporated	2–36 / ±1–18	8 @ 5V	0.4 @ 5V	16 @ 5V	2500	0 to 70	SOT-25	CMOS, DTL, ECL, MOS, Open-Collector, TTL
LMV331W5-7	Diodes Incorporated	2.7–5.5	7 @ 5V	0.25 @ 5V	84 @ 5V	200	-40 to 125	SOT-25	Open-Collector
MIC6270YM5-TR	Microchip Technology	2–36 / ±1–18	5 @ 5V	0.25 @ 5V	20 @ 5V	1200	-40 to 85	SOT-23-5	CMOS, DTL, ECL, MOS, Open-Collector, TTL
TA75S393F,LF	Toshiba Semiconductor and Storage	2–36 / ±1–18	5 @ 5V	0.05 @ 5V	16 @ 5V	800	-40 to 85	SMV	CMOS, DTL, MOS, Open-Collector, TTL
TS391AILT	STMicroelectronics	2–36 / ±1–18	5 @ 30V	0.25 @ 5V	16 @ 5V	1250	-40 to 125	SOT-23-5	CMOS, DTL, ECL, MOS, TTL
TS391RILT	STMicroelectronics	2–36 / ±1–18	5 @ 30V	0.25 @ 5V	16 @ 5V	1250	-40 to 125	SOT-23-5	CMOS, DTL, ECL, MOS, TTL

Engineering Selection Recommendations

Direct Parametric Equivalents (Identical Specifications)

TL331IDBVRQ1 and TL331IDBVT are parametric equivalents of the TL331IDBVR, sharing identical electrical characteristics and package form factor. TL331IDBVRQ1 carries automotive-grade qualification (AEC-Q100) and is suitable for applications requiring automotive reliability standards. All three variants maintain ROHS3 compliance and MSL 1 rating.

MFR Recommended Substitutes with Full Supply Range Compatibility

MIC6270YM5-TR (Microchip Technology) and TS391AILT/TS391RILT (STMicroelectronics) maintain the full supply voltage range (2V–36V / ±1V–18V) and SOT-23-5 package compatibility. MIC6270YM5-TR provides identical input offset voltage (5mV @ 5V) and input bias current (0.25µA @ 5V) specifications. TS391AILT and TS391RILT extend operating temperature to -40°C to 125°C, providing enhanced thermal performance. All maintain ROHS3 compliance and MSL 1 rating.

TA75S393F,LF (Toshiba) maintains full supply voltage range and identical input offset voltage but uses SMV package form factor instead of SOT-23-5. Input bias current is significantly lower (0.05µA @ 5V), which may benefit low-power applications.

MFR Recommended Substitutes with Restricted Supply Range

LM397MF/NOPB and LM397MFX/NOPB (Texas Instruments) operate within a narrower supply voltage range (5V–30V / ±2.5V–15V) compared to the TL331IDBVR. These parts are suitable only for applications operating within this restricted range. Both maintain SOT-23-5 package compatibility, ROHS3 compliance, and MSL 1 rating.

AP331AWG-7 (Diodes Incorporated) maintains full supply voltage range but operates only within 0°C to 70°C temperature range, restricting use in extended temperature applications. Package form factor is SOT-25 instead of SOT-23-5. Input bias current is higher (0.4µA @ 5V).

Limited Compatibility Substitute

LMV331W5-7 (Diodes Incorporated) operates within a restricted supply voltage range (2.7V–5.5V) and is suitable only for low-voltage applications. Extended operating temperature range (-40°C to 125°C) and higher output current capability (84mA @ 5V) may benefit specific low-voltage designs. Package form factor is SOT-25.

Frequently Asked Questions (FAQ)

Q: Can LM397MF/NOPB replace TL331IDBVR in all applications?

A: LM397MF/NOPB operates within a narrower supply voltage range (5V–30V / ±2.5V–15V) compared to TL331IDBVR (2V–36V / ±1V–18V). Substitution is valid only for circuits operating within the LM397MF/NOPB supply range. Verify your circuit's supply voltage requirements before selection.

Q: What is the difference between TL331IDBVR, TL331IDBVRQ1, and TL331IDBVT?

A: All three parts share identical electrical specifications and SOT-23-5 package form factor. TL331IDBVRQ1 is automotive-grade with AEC-Q100 qualification, suitable for automotive applications. TL331IDBVT is the commercial-grade variant. Selection depends on application requirements and qualification standards.

Q: Is TA75S393F,LF compatible with TL331IDBVR?

A: TA75S393F,LF maintains identical supply voltage range and input offset voltage specifications but uses SMV package form factor instead of SOT-23-5. Physical package differences require PCB layout modification. Input bias current is significantly lower (0.05µA @ 5V), which may affect circuit biasing. Verify PCB compatibility before substitution.

Q: Can AP331AWG-7 be used in extended temperature applications?

A: AP331AWG-7 operates only within 0°C to 70°C temperature range, compared to TL331IDBVR's -40°C to 85°C range. This part is not suitable for applications requiring extended low-temperature or high-temperature operation. Use TS391AILT or TS391RILT for extended temperature requirements (-40°C to 125°C).

Q: What are the package form factor differences among substitutes?

A: TL331IDBVR, LM397MF/NOPB, LM397MFX/NOPB, MIC6270YM5-TR, TS391AILT, and TS391RILT use SOT-23-5 package. AP331AWG-7 and LMV331W5-7 use SOT-25 package. TA75S393F,LF uses SMV package. SOT-23-5 and SOT-25 are mechanically similar but have different pin configurations. SMV is a distinct package form. Verify PCB footprint compatibility before substitution.

Q: Are all substitutes RoHS3 compliant?

A: All listed substitute parts maintain ROHS3 compliance and are suitable for RoHS-regulated applications. Moisture sensitivity level (MSL) is 1 (Unlimited) for all parts except LMV331W5-7, which carries MSL 3 (168 Hours). Verify storage and handling requirements for MSL 3 components.

Q: Which substitute offers the lowest quiescent current?

A: LMV331W5-7 offers the lowest quiescent current at 200µA, compared to TL331IDBVR's 700µA. However, LMV331W5-7 operates within a restricted supply voltage range (2.7V–5.5V) and temperature range (0°C to 70°C). For applications requiring low quiescent current within the full supply range, MIC6270YM5-TR (1200µA) and TS391AILT/TS391RILT (1250µA) are suitable alternatives.

Q: Which substitute provides the highest output current capability?

A: LMV331W5-7 provides the highest output current at 84mA @ 5V, compared to TL331IDBVR's 20mA. This enhanced capability is limited to low-voltage applications (2.7V–5.5V). For applications requiring higher output current within the full supply range, MIC6270YM5-TR and TL331IDBVR maintain 20mA output current capability.

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