LMV321M5X Equivalent & Substitute Parts

Part Overview

The LMV321M5X is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This device features rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications. The LMV321M5X is classified as obsolete product status, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across critical electrical parameters including supply voltage range, output type, and package form factor.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	1	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	15	nA
Voltage - Input Offset	1.7	mV
Current - Supply	130	µA
Current - Output / Channel	160	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LMV321M5X are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Output Type: Rail-to-Rail (mandatory)
Package / Case: SC-74A, SOT-753 or equivalent SOT-23-5 footprint (mandatory)
Voltage - Supply Span: Minimum 2.7 V, Maximum 5.5 V (mandatory overlap required)
Mounting Type: Surface Mount (mandatory)
Number of Circuits: 1 (mandatory)

Secondary Compatibility Parameters:

Slew Rate: 1 V/µs (reference baseline)
Gain Bandwidth Product: 1 MHz (reference baseline)
Current - Input Bias: 15 nA (reference baseline)
Voltage - Input Offset: 1.7 mV (reference baseline)
Current - Supply: 130 µA (reference baseline)
Current - Output / Channel: 160 mA (reference baseline)

Substitute parts are grouped into two categories: Direct Equivalents (matching all critical parameters within specified tolerances) and Functional Alternatives (meeting critical parameters with variations in secondary performance characteristics). All substitute parts listed maintain the mandatory electrical and mechanical compatibility requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	RoHS Status
LMV321M5X	Texas Instruments	Obsolete	1	1	15	1.7	130	160	2.7	5.5	-40 to 85	SOT-23-5	Non-compliant
LMV321M5X/NOPB	Texas Instruments	Active	1	1	15	1.7	130	—	2.7	5.5	-40 to 85	SOT-23-5	ROHS3 Compliant
ADA4891-1ARJZ-R7	Analog Devices Inc.	Active	210	240	0.002	2.5	4400	125	2.7	5.5	-40 to 125	SOT-23-5	ROHS3 Compliant
ADA4891-1ARJZ-RL	Analog Devices Inc.	Active	210	240	0.002	2.5	4400	125	2.7	5.5	-40 to 125	SOT-23-5	ROHS3 Compliant
AZV321KTR-E1	Diodes Incorporated	Active	1	1	250	1.7	130	160	2.7	5.5	-40 to 85	SOT-23-5	ROHS3 Compliant
AZV321KTR-G1	Diodes Incorporated	Active	1	1	250	1.7	130	160	2.7	5.5	-40 to 85	SOT-23-5	ROHS3 Compliant
BU7241G-TR	Rohm Semiconductor	Active	0.4	0.9	0.001	1	70	12	1.8	5.5	-40 to 85	5-SSOP	ROHS3 Compliant
LMV321ILT	STMicroelectronics	Active	0.45	1.3	16	0.1	162	48	2.7	6	-40 to 125	SOT-23-5	ROHS3 Compliant
LMV321IYLT	STMicroelectronics	Active	0.45	1.3	16	0.1	162	48	2.7	6	-40 to 125	SOT-23-5	ROHS3 Compliant
LMV321RILT	STMicroelectronics	Active	0.45	1.3	16	0.1	162	48	2.7	6	-40 to 125	SOT-23-5	ROHS3 Compliant
LMV321RIYLT	STMicroelectronics	Active	0.45	1.3	16	0.1	162	48	2.7	6	-40 to 125	SOT-23-5	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

LMV321M5X/NOPB from Texas Instruments is the direct equivalent of the obsolete LMV321M5X. This part maintains identical electrical specifications and package form factor while offering active product status and ROHS3 compliance. Selection of LMV321M5X/NOPB eliminates design re-qualification requirements and ensures pin-for-pin compatibility.

Alternative Substitutes from STMicroelectronics:

LMV321ILT, LMV321IYLT, LMV321RILT, and LMV321RIYLT are functionally compatible alternatives manufactured by STMicroelectronics under the LMV321 base product number. These parts maintain the same package footprint (SOT-23-5) and supply voltage range (2.7 V to 6 V). Performance variations include reduced slew rate (0.45 V/µs versus 1 V/µs), improved gain bandwidth product (1.3 MHz versus 1 MHz), and lower input offset voltage (100 µV versus 1.7 mV). All STMicroelectronics variants are ROHS3 compliant and support extended operating temperature range (-40°C to 125°C). LMV321IYLT and LMV321RIYLT include automotive-grade qualification (AEC-Q100) for applications requiring automotive reliability standards.

Alternative Substitutes from Diodes Incorporated:

AZV321KTR-E1 and AZV321KTR-G1 from Diodes Incorporated provide functional equivalence with identical electrical specifications to the original LMV321M5X. Both parts maintain SOT-23-5 package compatibility, 1 V/µs slew rate, 1 MHz gain bandwidth product, and 2.7 V to 5.5 V supply range. Input bias current is specified at 250 nA (versus 15 nA baseline), representing the primary performance differential. Both variants are ROHS3 compliant with MSL-3 moisture sensitivity rating.

Performance-Enhanced Alternative:

ADA4891-1ARJZ-R7 and ADA4891-1ARJZ-RL from Analog Devices Inc. offer significantly enhanced performance characteristics while maintaining SOT-23-5 package compatibility and 2.7 V to 5.5 V supply range. These parts feature 210 V/µs slew rate, 240 MHz gain bandwidth product, and 2 pA input bias current. Extended operating temperature range (-40°C to 125°C) and ROHS3 compliance are provided. Selection of ADA4891 variants is appropriate for applications requiring higher bandwidth and faster transient response than the original LMV321M5X specification.

Limited Compatibility Alternative:

BU7241G-TR from Rohm Semiconductor maintains rail-to-rail output and surface mount configuration but uses 5-SSOP package instead of SOT-23-5. This part is not pin-for-pin compatible and requires PCB redesign. Supply voltage minimum is reduced to 1.8 V, expanding low-voltage capability. Slew rate (0.4 V/µs) and gain bandwidth product (900 kHz) are below the original specification. Selection of BU7241G-TR is appropriate only when package footprint change is acceptable and lower performance specifications are tolerable.

Frequently Asked Questions (FAQ)

Q: Can LMV321M5X/NOPB be used as a direct replacement for LMV321M5X?

A: Yes. LMV321M5X/NOPB is the active production equivalent of the obsolete LMV321M5X. Both parts share identical electrical specifications, pin configuration, and SOT-23-5 package form factor. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit modifications are required.

Q: What are the key differences between LMV321M5X and STMicroelectronics LMV321 variants?

A: STMicroelectronics LMV321ILT, LMV321IYLT, LMV321RILT, and LMV321RIYLT maintain the same base product number and package footprint but offer improved performance specifications. Slew rate is reduced to 0.45 V/µs, gain bandwidth product increases to 1.3 MHz, and input offset voltage improves to 100 µV. Supply voltage range extends to 6 V maximum. Operating temperature range extends to 125°C. All variants are ROHS3 compliant. Pin configuration and package footprint remain identical, enabling direct substitution.

Q: Are ADA4891-1ARJZ-R7 and ADA4891-1ARJZ-RL interchangeable?

A: Yes. Both Analog Devices parts share identical electrical specifications and SOT-23-5 package configuration. The suffix designations (-R7 and -RL) indicate different packaging formats (Cut Tape & Digi-Reel versus Tape & Reel). Electrical performance and pin configuration are equivalent. Selection between these variants depends on procurement and handling requirements.

Q: Can BU7241G-TR replace LMV321M5X without PCB modification?

A: No. BU7241G-TR uses 5-SSOP package instead of SOT-23-5, resulting in different pin spacing and footprint. PCB redesign is required for physical mounting. Additionally, reduced output current capability (12 mA versus 160 mA) and lower slew rate (0.4 V/µs versus 1 V/µs) may impact circuit performance. BU7241G-TR is suitable only when package change is acceptable and performance requirements are compatible.

Q: What is the significance of AEC-Q100 qualification on LMV321IYLT and LMV321RIYLT?

A: AEC-Q100 qualification indicates automotive-grade reliability testing and qualification. These variants are suitable for automotive applications requiring enhanced reliability standards. Non-automotive variants (LMV321ILT and LMV321RILT) lack this qualification but are otherwise electrically identical. Selection of automotive-qualified variants is mandatory for automotive applications; optional for general industrial and consumer applications.

Q: How do input bias current specifications affect substitution compatibility?

A: Input bias current affects circuit performance in high-impedance applications. LMV321M5X specifies 15 nA baseline. AZV321KTR variants specify 250 nA, representing 16.7× higher bias current. ADA4891 variants specify 2 pA, representing 133× lower bias current. BU7241G-TR specifies 1 pA. In applications with high source impedance or precision transimpedance configurations, input bias current variations may require circuit compensation adjustments. Direct substitution is acceptable in applications where input bias current is not a critical design parameter.

Q: What packaging format differences exist among substitute parts?

A: All substitute parts except BU7241G-TR use SOT-23-5 package with identical pin configuration and footprint. Packaging format variations (Cut Tape & Digi-Reel, Tape & Reel, or individual packaging) affect procurement and handling but not electrical compatibility. BU7241G-TR uses 5-SSOP package with different pin spacing, requiring PCB redesign. Moisture sensitivity level (MSL) varies: most parts specify MSL-1 (unlimited shelf life); AZV321 variants specify MSL-3 (168 hours maximum shelf life at specified humidity). MSL-3 parts require controlled storage conditions.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed are ROHS3 compliant. The original LMV321M5X is RoHS non-compliant. RoHS compliance is mandatory for new designs and many procurement specifications. LMV321M5X/NOPB and all alternative substitutes meet current RoHS requirements.

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