LMV331IDBVRG4 Equivalent & Substitute Parts

Part Overview

The LMV331IDBVRG4 is a general-purpose comparator IC manufactured by Texas Instruments, featuring open-collector output in SOT-23-5 surface-mount packaging. This single-element comparator operates across a 2.7V to 5.5V supply voltage range and is designed for precision signal comparison applications. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility while meeting current availability and compliance requirements.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LMV331IDBVRG4
Category	Linear - Comparator
Type	General Purpose
Output Type	Open-Collector
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V
Voltage - Input Offset (Max)	7mV @ 5V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	84mA @ 5V
Current - Quiescent (Max)	150µA
Propagation Delay (Max)	600ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution of the LMV331IDBVRG4 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Supply voltage range: 2.7V ~ 5.5V
Output type: Open-Collector configuration
Package: SOT-23-5 surface-mount
Input offset voltage: 7mV @ 5V maximum
Input bias current: 0.25µA @ 5V maximum
Output current: 84mA @ 5V typical
Propagation delay: 600ns maximum
Operating temperature: -40°C ~ 85°C minimum
Quiescent current: 150µA maximum

Substitute parts are classified into two categories:

MFR Recommended Substitutes: Texas Instruments LMV331 series variants with identical electrical specifications and active product status, differing only in packaging format (Cut Tape, Tape & Reel) or package case variant (SOT-23-5 vs. SC-70-5).

Parametric Equivalents: Texas Instruments LMV331IDBVR and LMV331IDBVT, which maintain identical electrical performance and SOT-23-5 packaging but differ in tape format or product discontinuation status.

Cross-Manufacturer Alternative: Diodes Incorporated LMV331W5-7 and Analog Devices MAX9021AUK+T, which meet core electrical parameters but introduce variations in quiescent current, propagation delay, operating temperature range, or output type configuration.

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Propagation Delay (Max)	Operating Temp	Output Type
LMV331IDBVRG4	Texas Instruments	Discontinued	SOT-23-5	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	150µA	600ns	-40°C ~ 85°C	Open-Collector
LMV331M5/NOPB	Texas Instruments	Active	SOT-23-5	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	120µA	600ns	-40°C ~ 85°C	CMOS, Open-Collector, TTL
LMV331M5X/NOPB	Texas Instruments	Active	SOT-23-5	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	120µA	600ns	-40°C ~ 85°C	CMOS, Open-Collector, TTL
LMV331M7/NOPB	Texas Instruments	Active	SC-70-5	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	120µA	600ns	-40°C ~ 85°C	CMOS, Open-Collector, TTL
LMV331M7X/NOPB	Texas Instruments	Active	SC-70-5	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	120µA	600ns	-40°C ~ 85°C	CMOS, Open-Collector, TTL
LMV331IDBVR	Texas Instruments	Active	SOT-23-5	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	150µA	600ns	-40°C ~ 85°C	Open-Collector
LMV331IDBVRE4	Texas Instruments	Discontinued	SOT-23-5	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	150µA	600ns	-40°C ~ 85°C	Open-Collector
LMV331IDBVT	Texas Instruments	Active	SOT-23-5	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	150µA	600ns	-40°C ~ 85°C	Open-Collector
LMV331W5-7	Diodes Incorporated	Active	SOT-25	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	200µA	450ns	-40°C ~ 125°C	Open-Collector
MAX9021AUK+T	Analog Devices Inc./Maxim Integrated	Active	SOT-23-5	2.5V ~ 5.5V, ±1.25V ~ 2.75V	1mV @ 5V	0.003µA @ 5V	Not Specified	5µA	8µs	-40°C ~ 125°C	CMOS, Rail-to-Rail, TTL

Engineering Selection Recommendations

Direct Replacement (Identical Electrical & Mechanical Specifications):

LMV331IDBVT is the primary direct replacement for LMV331IDBVRG4. Both parts maintain identical electrical parameters, SOT-23-5 packaging, and open-collector output configuration. LMV331IDBVT carries active product status with 4,400 pieces in stock, ensuring supply continuity. The only difference is tape format (Tape & Reel vs. the original's unspecified format).

Functionally Equivalent with Active Status:

LMV331IDBVR provides parametric equivalence with identical electrical specifications and SOT-23-5 packaging. With 89,300 pieces in stock and active product status, this part offers superior availability. Quiescent current specification remains at 150µA, matching the original.

Texas Instruments LMV331 Series Variants (Active Status):

LMV331M5/NOPB and LMV331M5X/NOPB are MFR-recommended substitutes with active product status. These parts reduce quiescent current to 120µA while maintaining all other electrical parameters. Both are available in SOT-23-5 packaging with high inventory levels (2,400 and 20,200 pieces respectively). Output type specification expands to CMOS, Open-Collector, TTL compatibility.

LMV331M7/NOPB and LMV331M7X/NOPB are functionally equivalent but use SC-70-5 packaging instead of SOT-23-5. These require PCB layout modification and are suitable only when package footprint change is acceptable.

Cross-Manufacturer Alternatives:

LMV331W5-7 (Diodes Incorporated) maintains core electrical specifications but operates across -40°C to 125°C (extended upper temperature limit) with 200µA quiescent current. Propagation delay improves to 450ns. SOT-25 packaging differs from SOT-23-5, requiring PCB redesign.

MAX9021AUK+T (Analog Devices/Maxim) offers superior performance characteristics: 1mV input offset voltage, 0.003µA input bias current, 100dB CMRR, and 80dB PSRR. However, propagation delay extends to 8µs, and output type changes to CMOS Rail-to-Rail TTL. Supply voltage range expands to include dual ±1.25V to ±2.75V operation. This part is suitable only when enhanced precision and rail-to-rail capability justify the performance trade-offs.

Compliance & Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels range from MSL 1 (unlimited) to MSL 3 (168 hours), with implications for storage and handling procedures.

Frequently Asked Questions (FAQ)

Q: Can LMV331IDBVT directly replace LMV331IDBVRG4 without circuit modification?

A: Yes. LMV331IDBVT is a direct replacement. Both parts share identical electrical specifications, SOT-23-5 packaging, and open-collector output configuration. The only difference is tape format (Tape & Reel), which does not affect circuit performance.

Q: What is the difference between LMV331M5/NOPB and LMV331IDBVR?

A: Both are Texas Instruments LMV331 comparators with identical electrical performance in SOT-23-5 packaging. LMV331M5/NOPB reduces quiescent current to 120µA (vs. 150µA) and specifies output type as CMOS, Open-Collector, TTL. LMV331IDBVR maintains 150µA quiescent current with open-collector output only. LMV331M5/NOPB is MFR-recommended and offers lower power consumption.

Q: Why do LMV331M7/NOPB and LMV331M7X/NOPB use different packaging?

A: LMV331M7/NOPB uses SC-70-5 packaging (Tape & Reel format), while LMV331M7X/NOPB uses SC-70-5 packaging (Cut Tape & Digi-Reel format). Both are functionally identical but differ in supply format. SC-70-5 is a smaller package than SOT-23-5, requiring PCB layout redesign if substitution is selected.

Q: Is MAX9021AUK+T a suitable replacement for LMV331IDBVRG4?

A: MAX9021AUK+T is not a direct replacement. While both are general-purpose comparators in SOT-23-5 packaging, MAX9021AUK+T introduces significant differences: propagation delay extends from 600ns to 8µs, output type changes to CMOS Rail-to-Rail TTL, and quiescent current drops to 5µA. This part is suitable only when enhanced precision (1mV input offset) and rail-to-rail capability are required and the slower propagation delay is acceptable.

Q: What are the implications of selecting LMV331W5-7 from Diodes Incorporated?

A: LMV331W5-7 maintains core electrical specifications but introduces three changes: SOT-25 packaging (requires PCB redesign), extended operating temperature to 125°C, and increased quiescent current to 200µA. Propagation delay improves to 450ns. This part is suitable for applications requiring extended temperature range and where PCB layout modification is feasible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with LMV331IDBVRG4.

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

A: MSL 1 (unlimited) parts like LMV331IDBVR and LMV331IDBVT require no special moisture handling. LMV331W5-7 carries MSL 3 (168 hours), requiring storage in dry conditions and baking procedures if exposed to moisture for extended periods. This affects supply chain handling and storage protocols.

Q: Which substitute offers the best availability?

A: LMV331M5X/NOPB offers the highest inventory with 20,200 pieces in stock. LMV331IDBVR follows with 89,300 pieces. Both are active products with MFR-recommended or parametric equivalent status.

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