LMV931MFX Equivalent & Substitute Parts

Part Overview

The LMV931MFX is a general-purpose operational amplifier manufactured by Texas Instruments, packaged in SOT-23-5 surface mount configuration. This rail-to-rail output amplifier operates across a 1.8 V to 5.5 V supply range and is designed for low-power analog signal processing applications. The device is currently in Last Time Buy status, indicating discontinued production. Identification of equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for ongoing production and maintenance applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	0.42	V/µs
Gain Bandwidth Product	1.5	MHz
Current - Input Bias	14	nA
Voltage - Input Offset	1	mV
Current - Supply	116	µA
Current - Output / Channel	100	mA
Voltage - Supply Span (Min)	1.8	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LMV931MFX is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Output Type: Rail-to-Rail
Voltage Supply Range: Minimum 1.8 V, Maximum 5.5 V (or compatible overlap)
Operating Temperature Range: -40°C to 125°C (or compatible overlap)
Mounting Type: Surface Mount
Package Compatibility: SOT-23-5 or equivalent footprint (SC-74A, SOT-753)

Secondary Performance Parameters:

Slew Rate: 0.42 V/µs or greater
Gain Bandwidth Product: 1.5 MHz or greater
Current - Input Bias: 14 nA or lower
Voltage - Input Offset: 1 mV or lower
Current - Supply: 116 µA or lower
Current - Output / Channel: 100 mA or greater

Substitute parts are grouped into two categories: Direct Equivalents (identical specifications and packaging) and Functional Equivalents (compatible electrical and mechanical parameters within acceptable engineering tolerances).

Parameter Comparison

Parameter	LMV931MFX	LMV931MFX/NOPB	BU7241G-TR	LMV321ILT	LMV321IYLT	LMV321WG-7	MCP6001RT-E/OT	MCP6001RT-I/OT	MCP6001T-E/OT	MCP6001T-I/OT	MCP6001UT-E/OT
Manufacturer	Texas Instruments	Texas Instruments	Rohm Semiconductor	STMicroelectronics	STMicroelectronics	Diodes Incorporated	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.42	0.42	0.4	0.45	0.45	1	0.6	0.6	0.6	0.6	0.6
Gain Bandwidth Product (MHz)	1.5	1.5	0.9	1.3	1.3	1	1	1	1	1	1
Current - Input Bias (nA)	14	14	0.001	16	16	15	0.001	0.001	0.001	0.001	0.001
Voltage - Input Offset (mV)	1	1	1	0.1	0.1	1.7	4.5	4.5	4.5	4.5	4.5
Current - Supply (µA)	116	116	70	162	162	110	100	100	100	100	100
Current - Output / Channel (mA)	100	100	12	48	48	90	23	23	23	23	23
Voltage - Supply Span Min (V)	1.8	1.8	1.8	2.7	2.7	2.7	1.8	1.8	1.8	1.8	1.8
Voltage - Supply Span Max (V)	5.5	5.5	5.5	6	6	5.5	6	6	6	6	6
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 85	-40 to 125	-40 to 125	-40 to 85	-40 to 125	-40 to 85	-40 to 125	-40 to 85	-40 to 125
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Supplier Device Package	SOT-23-5	SOT-23-5	5-SSOP	SOT-23-5	SOT-23-5	SOT-25	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalent (Highest Compatibility):

LMV931MFX/NOPB is the direct equivalent of LMV931MFX. Both devices are manufactured by Texas Instruments with identical electrical specifications, packaging, and compliance certifications. The primary distinction is product status: LMV931MFX/NOPB is Active, while LMV931MFX is Last Time Buy. This part is recommended as the primary replacement for new designs and ongoing production.

Functional Equivalents (Compatible Substitution):

The following parts meet the core substitution criteria of general-purpose, single-circuit, rail-to-rail amplifiers in surface mount packages with compatible supply voltage ranges and operating temperature spans:

STMicroelectronics LMV321 Series (LMV321ILT, LMV321IYLT, LMV321WG-7): These devices maintain SOT-23-5 or SOT-25 packaging and operate across -40°C to 125°C (LMV321ILT, LMV321IYLT) or -40°C to 85°C (LMV321WG-7). Supply voltage range extends to 6 V maximum. LMV321IYLT includes AEC-Q100 automotive qualification. All three variants are in Active product status. The LMV321WG-7 uses SOT-25 packaging, which requires PCB layout verification for footprint compatibility.

Microchip Technology MCP6001 Series (MCP6001RT-E/OT, MCP6001RT-I/OT, MCP6001T-E/OT, MCP6001T-I/OT, MCP6001UT-E/OT): All MCP6001 variants maintain SOT-23-5 packaging and operate across 1.8 V to 6 V supply range. Operating temperature ranges are -40°C to 125°C (MCP6001RT-E/OT, MCP6001T-E/OT, MCP6001UT-E/OT) or -40°C to 85°C (MCP6001RT-I/OT, MCP6001T-I/OT). All variants are in Active product status with MSL 1 (Unlimited) rating. These devices feature extremely low input bias current (1 pA) compared to the LMV931MFX (14 nA), making them suitable for high-impedance input applications.

Rohm Semiconductor BU7241G-TR: This device operates across 1.8 V to 5.5 V supply range and -40°C to 85°C temperature span. It is packaged in 5-SSOP format, which differs from the SOT-23-5 package of the LMV931MFX. PCB layout redesign is required for this substitution. The device is in Active product status.

Compliance and Regulatory Considerations:

All substitute parts listed are ROHS3 Compliant and REACH Unaffected, matching the regulatory status of the LMV931MFX. Moisture sensitivity levels are predominantly MSL 1 (Unlimited), with the exception of LMV321WG-7 (MSL 3, 168 Hours), which requires controlled storage and handling procedures.

Frequently Asked Questions (FAQ)

Q1: Can LMV931MFX/NOPB be used as a direct replacement for LMV931MFX?

A: Yes. LMV931MFX/NOPB is the direct equivalent manufactured by Texas Instruments with identical electrical specifications, packaging (SOT-23-5), and compliance certifications. The only difference is product status: LMV931MFX/NOPB is Active, while LMV931MFX is Last Time Buy. No circuit modifications are required.

Q2: What are the key differences between LMV931MFX and the MCP6001 series?

A: Both are general-purpose, single-circuit, rail-to-rail amplifiers in SOT-23-5 packages. The MCP6001 series features significantly lower input bias current (1 pA versus 14 nA), making it superior for high-impedance input circuits. However, MCP6001 has higher input offset voltage (4.5 mV versus 1 mV). Supply voltage ranges and operating temperatures are compatible. Electrical performance differences are within acceptable engineering tolerances for most general-purpose applications.

Q3: Is the LMV321WG-7 a suitable substitute despite different packaging?

A: LMV321WG-7 uses SOT-25 packaging instead of SOT-23-5. While electrical specifications are compatible, PCB layout redesign is mandatory. The SOT-25 package has a different pin configuration and footprint. Verify pin assignments and PCB trace routing before implementation. Operating temperature range is limited to -40°C to 85°C compared to LMV931MFX (-40°C to 125°C).

Q4: Which substitute part has the lowest power consumption?

A: BU7241G-TR has the lowest supply current at 70 µA, compared to LMV931MFX at 116 µA. However, BU7241G-TR is packaged in 5-SSOP format, requiring PCB redesign. Among SOT-23-5 packaged alternatives, MCP6001 series and LMV321WG-7 offer comparable or lower supply current (100-110 µA) with direct footprint compatibility.

Q5: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 Compliant and REACH Unaffected, matching the regulatory status of LMV931MFX. Moisture sensitivity levels are MSL 1 (Unlimited) for most parts, with LMV321WG-7 rated MSL 3 (168 Hours), requiring controlled storage conditions.

Q6: What is the maximum output current capability of substitute parts?

A: LMV931MFX provides 100 mA output current per channel. Substitute parts vary: LMV321 series provides 48 mA (LMV321ILT, LMV321IYLT) or 90 mA (LMV321WG-7); MCP6001 series provides 23 mA; BU7241G-TR provides 12 mA. Applications requiring full 100 mA output current should use LMV931MFX/NOPB or LMV321WG-7.

Q7: Can MCP6001 variants be used interchangeably?

A: MCP6001 variants differ in temperature range and packaging format. MCP6001RT-E/OT, MCP6001T-E/OT, and MCP6001UT-E/OT operate -40°C to 125°C; MCP6001RT-I/OT and MCP6001T-I/OT operate -40°C to 85°C. All use SOT-23-5 packaging. Select the temperature-rated variant matching your application requirements. Electrical specifications are identical across all MCP6001 variants.

Q8: Is automotive qualification available for substitute parts?

A: Yes. LMV321IYLT is qualified to AEC-Q100 automotive standard, making it suitable for automotive applications. Other substitute parts do not carry automotive qualification. If automotive-grade components are required, LMV321IYLT is the appropriate selection.

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