LMV321M7 Equivalent & Substitute Parts

Part Overview

The LMV321M7 is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a 5-TSSOP SC-70-5 surface mount package. This device features rail-to-rail output capability and is designed for low-power applications requiring single-circuit amplification. The LMV321M7 carries a "Not For New Designs" product status, indicating it is obsolete or being phased out. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for existing applications or new designs requiring comparable performance characteristics.

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	5-TSSOP, SC-70-5, SOT-353	—

Substitute Part Grouping Explanation

Substitution of the LMV321M7 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Output Type: Rail-to-Rail
Package / Case: 5-TSSOP, SC-70-5, SOT-353
Mounting Type: Surface Mount
Voltage - Supply Span: 2.7 V minimum to 5.5 V maximum
Operating Temperature Range: -40°C to 85°C minimum

Secondary Performance Parameters (must match or exceed):

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

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical specifications) and Functional Equivalents (meet or exceed all critical parameters with minor deviations in secondary specifications).

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)	Temp Range (°C)	RoHS Status
LMV321M7	Texas Instruments	Not For New Designs	1	1	15	1.7	130	160	-40 to 85	Non-compliant
LMV321M7/NOPB	Texas Instruments	Active	1	1	15	1.7	130	160	-40 to 85	ROHS3 Compliant
LMV321SQ3T2G	onsemi	Active	1	1	1	1.7	130	160	-40 to 85	ROHS3 Compliant
AZV321KSTR-G1	Diodes Incorporated	Active	1	1	250	1.7	130	160	-40 to 85	ROHS3 Compliant
TSV851ICT	STMicroelectronics	Active	0.7	1.3	27	4	130	70	-40 to 125	ROHS3 Compliant
TSV851AICT	STMicroelectronics	Active	0.7	1.3	27	0.8	130	70	-40 to 125	ROHS3 Compliant
TSV631ICT	STMicroelectronics	Active	0.34	0.88	0.001	3	60	74	-40 to 125	ROHS3 Compliant
LMV821SQ3T2G	onsemi	Active	2	5.6	119	1	300	45	-40 to 85	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended for Existing Designs):

LMV321M7/NOPB is the primary substitute for LMV321M7. This part maintains identical electrical specifications while offering Active product status and ROHS3 compliance. The /NOPB designation indicates lead-free, RoHS-compliant manufacturing. This part is suitable for direct substitution in existing PCB layouts and designs without modification.

Tier 2 - Functional Equivalents (Compatible with Minor Considerations):

LMV321SQ3T2G (onsemi) provides identical performance specifications with superior input bias current (1 nA versus 15 nA). This part is suitable for applications where lower input bias current provides design margin. Package designation SC-88A is mechanically and electrically compatible with SC-70-5/SOT-353.

AZV321KSTR-G1 (Diodes Incorporated) maintains all critical electrical parameters with the exception of input bias current (250 nA). This part is suitable for applications where input bias current specification is not critical. Moisture Sensitivity Level is MSL-3 (168 hours) compared to MSL-1 for the primary part.

Tier 3 - Performance-Enhanced Alternatives (For New Designs):

LMV821SQ3T2G (onsemi) offers enhanced performance with 2 V/µs slew rate and 5.6 MHz gain bandwidth product. This part is suitable for applications requiring faster signal processing. Supply current is elevated to 300 µA and output current is reduced to 45 mA. Operating temperature range matches the original specification.

TSV851ICT and TSV851AICT (STMicroelectronics) provide extended operating temperature range (-40°C to 125°C) with comparable slew rate (0.7 V/µs) and gain bandwidth product (1.3 MHz). Output current is reduced to 70 mA. These parts are suitable for industrial temperature applications.

Tier 4 - Limited Compatibility:

TSV631ICT (STMicroelectronics) does not meet secondary performance criteria. Slew rate (0.34 V/µs) and gain bandwidth product (0.88 MHz) fall below the original specification. This part is not recommended as a substitute for LMV321M7.

Compliance and Certification:

All recommended substitute parts carry ROHS3 compliance and REACH Unaffected status. The original LMV321M7 is RoHS non-compliant. Selection of LMV321M7/NOPB or equivalent ensures compliance with current environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can LMV321M7/NOPB be used as a direct replacement for LMV321M7?

A: Yes. LMV321M7/NOPB is electrically and mechanically identical to LMV321M7. The /NOPB designation indicates lead-free, RoHS-compliant manufacturing. No PCB layout or design modifications are required.

Q: What is the difference between LMV321SQ3T2G and LMV321M7?

A: LMV321SQ3T2G is manufactured by onsemi and carries Active product status. Input bias current is superior (1 nA versus 15 nA). All other electrical specifications are identical. Package designation SC-88A is mechanically and electrically compatible with SC-70-5/SOT-353.

Q: Why is TSV631ICT not recommended as a substitute?

A: TSV631ICT does not meet the secondary performance criteria for slew rate (0.34 V/µs versus 1 V/µs required) and gain bandwidth product (0.88 MHz versus 1 MHz required). This part is not suitable for applications requiring the original performance envelope.

Q: Can LMV821SQ3T2G be used in place of LMV321M7?

A: LMV821SQ3T2G is suitable for new designs requiring enhanced performance. Slew rate is 2 V/µs and gain bandwidth product is 5.6 MHz. Supply current is elevated to 300 µA and output current is reduced to 45 mA. Existing designs must be re-evaluated for compatibility with these parameter changes.

Q: What is the significance of the SC-70-5 package designation?

A: SC-70-5 is a 5-pin thin small-outline package (TSSOP) used for surface mount applications. All substitute parts listed maintain this package form factor, ensuring mechanical compatibility with existing PCB layouts.

Q: Are all substitute parts RoHS compliant?

A: All recommended substitute parts carry ROHS3 compliance. The original LMV321M7 is RoHS non-compliant. Selection of compliant alternatives ensures adherence to current environmental and regulatory standards.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied in individual strips suitable for manual assembly or small-volume production. Tape & Reel packaging is supplied on continuous reels suitable for automated assembly equipment. Electrical specifications are identical; packaging format is determined by production volume and assembly method requirements.

Q: Can AZV321KSTR-G1 be used in high-impedance input applications?

A: AZV321KSTR-G1 carries input bias current specification of 250 nA, which is significantly higher than LMV321M7 (15 nA). For high-impedance input applications where input bias current introduces unacceptable error, LMV321SQ3T2G (1 nA) is the preferred alternative.

Q: What is the Moisture Sensitivity Level (MSL) and why does it matter?

A: MSL indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering. MSL-1 (Unlimited) allows indefinite storage. MSL-3 (168 hours) requires controlled storage conditions. For applications with extended inventory holding periods, MSL-1 parts are preferred.

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