LPV321IDBVR Equivalent & Substitute Parts

Part Overview

The LPV321IDBVR 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 and is designed for low-power applications requiring single-channel amplification. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within system designs.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	0.1	V/µs
Gain Bandwidth Product	237	kHz
Current - Input Bias	2	nA
Voltage - Input Offset	1.5	mV
Current - Supply	9	µA
Current - Output / Channel	72	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—

Substitute Part Grouping Explanation

Substitution of the LPV321IDBVR is determined by the following critical parameters:

Package Compatibility: The main part uses SOT-23-5 packaging. Substitutes must maintain identical or mechanically compatible package footprints to ensure PCB-level interchangeability without layout modifications.

Electrical Specifications: Substitutes must support the same supply voltage range (2.7 V to 5 V minimum), maintain rail-to-rail output capability, and preserve single-channel general-purpose amplifier functionality. Input bias current, input offset voltage, and output current drive capability define the operational envelope.

Performance Characteristics: The slew rate (0.1 V/µs) and gain bandwidth product (237 kHz for the main part, up to 1 MHz for active substitutes) establish the frequency response and transient behavior. Substitutes with higher bandwidth products remain functionally compatible in applications designed for the original specifications.

Product Status and Compliance: Active substitute parts ensure long-term availability and supply chain continuity. RoHS3 compliance and REACH unaffected status are maintained across all listed substitutes.

Substitutes are grouped into two categories:

Category 1 - Direct LPV321 Series Variants (SOT-23-5 Package): LPV321M5/NOPB, LPV321M5X/NOPB, LPV321M7/NOPB, LPV321M7X/NOPB maintain the LPV321 base product number with identical electrical characteristics (0.1 V/µs slew rate, 152 kHz gain bandwidth product) and are available in active product status.

Category 2 - Enhanced Performance Alternatives (SOT-23-5 Package): LMV321M5/NOPB and LMV321M5X/NOPB offer improved performance with 1 V/µs slew rate and 1 MHz gain bandwidth product while maintaining SOT-23-5 packaging and 2.7 V to 5.5 V supply compatibility.

Category 3 - Alternative Package Options (SC-70-5): LMV321M7/NOPB, LMV321M7X/NOPB, LPV321M7/NOPB, and LPV321M7X/NOPB provide SC-70-5 packaging alternatives for designs permitting package variation.

Category 4 - Cross-Manufacturer Alternatives (SOT-23-5 Package): AZV321KTR-E1 and AZV321KTR-G1 from Diodes Incorporated offer SOT-23-5 compatibility with enhanced performance specifications (1 V/µs slew rate, 1 MHz gain bandwidth product).

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Slew Rate (V/µs)	GBW (kHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (µA)	Output Current (mA)	Supply Span (V)	Temp Range (°C)
LPV321IDBVR	Texas Instruments	Obsolete	SOT-23-5	0.1	237	2	1.5	9	72	2.7–5	-40 to 125
LPV321M5/NOPB	Texas Instruments	Active	SOT-23-5	0.1	152	2	1.5	9	—	2.7–5	-40 to 85
LPV321M5X/NOPB	National Semiconductor	Active	SOT-23-5	0.1	152	2	1.5	9	—	2.7–5	-40 to 85
LPV321M7/NOPB	National Semiconductor	Active	SC-70-5	0.1	152	2	1.5	9	—	2.7–5	-40 to 85
LPV321M7X/NOPB	National Semiconductor	Active	SC-70-5	0.1	152	2	1.5	9	—	2.7–5	-40 to 85
LMV321M5/NOPB	Texas Instruments	Active	SOT-23-5	1	1000	15	1.7	130	160	2.7–5.5	-40 to 85
LMV321M5X/NOPB	Texas Instruments	Active	SOT-23-5	1	1000	15	1.7	130	—	2.7–5.5	-40 to 85
LMV321M7/NOPB	Texas Instruments	Active	SC-70-5	1	1000	15	1.7	130	160	2.7–5.5	-40 to 85
LMV321M7X/NOPB	Texas Instruments	Active	SC-70-5	1	1000	15	1.7	130	—	2.7–5.5	-40 to 85
AZV321KTR-E1	Diodes Incorporated	Active	SOT-23-5	1	1000	250	1.7	130	160	2.7–5.5	-40 to 85
AZV321KTR-G1	Diodes Incorporated	Active	SOT-23-5	1	1000	250	1.7	130	160	2.7–5.5	-40 to 85

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select LPV321M5/NOPB or LPV321M5X/NOPB when the original LPV321IDBVR specifications must be preserved exactly. These parts maintain 0.1 V/µs slew rate, 152 kHz gain bandwidth product, 2 nA input bias current, and 9 µA supply current. Both are active products from Texas Instruments and National Semiconductor respectively, ensuring supply continuity. Operating temperature range is -40°C to 85°C, which covers the lower end of the original -40°C to 125°C specification.

For Enhanced Performance with Package Compatibility:

Select LMV321M5/NOPB or LMV321M5X/NOPB when improved transient response and higher bandwidth are acceptable. These Texas Instruments parts maintain SOT-23-5 packaging and 2.7 V to 5.5 V supply compatibility while offering 1 V/µs slew rate and 1 MHz gain bandwidth product. Supply current increases to 130 µA and output current to 160 mA. These parts are active and provide superior performance for applications requiring faster settling time.

For Alternative Package Configurations:

Select LMV321M7/NOPB or LMV321M7X/NOPB when SC-70-5 packaging is acceptable and enhanced performance is desired. Select LPV321M7/NOPB or LPV321M7X/NOPB when SC-70-5 packaging is required with original electrical specifications. All SC-70-5 variants are active products.

For Cross-Manufacturer Sourcing:

Select AZV321KTR-E1 or AZV321KTR-G1 from Diodes Incorporated when supply diversification is required. These parts maintain SOT-23-5 packaging and offer 1 V/µs slew rate with 1 MHz gain bandwidth product. Input bias current is 250 nA, higher than Texas Instruments variants. Moisture sensitivity level is 3 (168 Hours) compared to level 1 for Texas Instruments parts.

Compliance Considerations:

All listed substitutes maintain RoHS3 compliance and REACH unaffected status. ECCN classification remains EAR99 across all variants. Moisture sensitivity and packaging specifications are provided for each part to support procurement and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can LMV321M5/NOPB directly replace LPV321IDBVR without circuit modification?

A: LMV321M5/NOPB maintains identical supply voltage range (2.7 V to 5.5 V), rail-to-rail output, and SOT-23-5 packaging. However, it exhibits higher slew rate (1 V/µs vs. 0.1 V/µs), higher gain bandwidth product (1 MHz vs. 237 kHz), and higher supply current (130 µA vs. 9 µA). These differences may affect circuit behavior in applications sensitive to transient response or power consumption. Functional compatibility exists, but circuit performance characteristics will change.

Q: What is the difference between LPV321M5/NOPB and LPV321M5X/NOPB?

A: Both parts share identical electrical specifications (0.1 V/µs slew rate, 152 kHz gain bandwidth product, 2 nA input bias current). LPV321M5/NOPB is manufactured by Texas Instruments with Tape & Reel packaging. LPV321M5X/NOPB is manufactured by National Semiconductor. The "X" suffix indicates extended temperature or packaging variant designation. Both are active products suitable for direct substitution.

Q: Why does the original LPV321IDBVR specify -40°C to 125°C while substitutes specify -40°C to 85°C?

A: The original part's extended temperature range to 125°C is a characteristic of the obsolete product line. Active substitutes from Texas Instruments and National Semiconductor are rated to 85°C maximum. Applications requiring operation above 85°C must evaluate whether the original temperature specification is functionally necessary or if 85°C operation is acceptable for the intended use case.

Q: Can SC-70-5 packaged parts (LMV321M7/NOPB, LPV321M7/NOPB) be used in place of SOT-23-5 packaged parts?

A: SC-70-5 and SOT-23-5 are mechanically incompatible packages with different pin configurations and footprints. SC-70-5 substitutes require PCB layout redesign and cannot be used as direct drop-in replacements. Select SC-70-5 variants only when PCB redesign is feasible or when space constraints favor the smaller package.

Q: What is the significance of the "X" designation in part numbers like LMV321M5X/NOPB?

A: The "X" suffix indicates a packaging or manufacturing variant. LMV321M5X/NOPB is supplied in Tape & Reel format, while LMV321M5/NOPB is supplied in Cut Tape & Digi-Reel format. Electrical specifications are identical. Selection depends on procurement volume and assembly equipment compatibility.

Q: How does input bias current affect circuit design when substituting LPV321IDBVR with AZV321KTR-G1?

A: LPV321IDBVR specifies 2 nA input bias current, while AZV321KTR-G1 specifies 250 nA. In high-impedance input circuits, the 125-fold increase in bias current may introduce additional offset voltage and noise. Applications with input impedances exceeding 1 MΩ should evaluate whether the higher bias current is acceptable or if bias current compensation is required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and REACH unaffected status, matching the compliance profile of the original LPV321IDBVR. ECCN classification is EAR99 for all variants.

Q: What inventory levels are available for each substitute?

A: Inventory availability varies by part number. LMV321M5X/NOPB has the highest inventory (65,100 pcs), followed by AZV321KTR-G1 (35,400 pcs) and LMV321M7X/NOPB (35,200 pcs). LPV321M5/NOPB has the lowest inventory (1,605 pcs). Procurement decisions should account for long-term supply requirements and lead times.

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