LPV321IDBVRE4 Equivalent & Substitute Parts

Part Overview

The LPV321IDBVRE4 is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This device is classified as obsolete, indicating discontinued production and limited availability. The LPV321IDBVRE4 features rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications. Due to its obsolete status, identifying functionally equivalent active alternatives is necessary for design continuity and procurement reliability.

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
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5	V
Operating Temperature Range	-40 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LPV321IDBVRE4 are organized into three functional categories based on electrical and mechanical compatibility:

Category 1: Direct LPV321 Series Substitutes (Same Base Product) Parts LPV321M5/NOPB, LPV321M5X/NOPB, LPV321M7/NOPB, and LPV321M7X/NOPB share the identical LPV321 base product number. These maintain the original electrical specifications: 0.1 V/µs slew rate, 152–237 kHz gain bandwidth product, 2 nA input bias current, 1.5 mV input offset voltage, and 9 µA supply current. Voltage supply range remains 2.7–5 V. Differences exist only in packaging format (SOT-23-5 versus SC-70-5) and tape/reel configurations. These are direct functional equivalents.

Category 2: LMV321 Series Substitutes (Enhanced Performance) Parts LMV321M5/NOPB, LMV321M5X/NOPB, LMV321M7/NOPB, and LMV321M7X/NOPB represent the LMV321 base product, an active successor to the LPV321. These devices maintain rail-to-rail output, single-circuit general-purpose amplifier topology, and identical supply voltage range (2.7–5.5 V). However, they feature enhanced electrical performance: 1 V/µs slew rate (10× improvement), 1 MHz gain bandwidth product (4–6× improvement), 15 nA input bias current, 1.7 mV input offset voltage, and 130 µA supply current. Operating temperature range is -40°C to 85°C. These substitutes provide superior performance characteristics while maintaining package compatibility options (SOT-23-5 and SC-70-5).

Category 3: Alternative Manufacturer Substitutes Parts LPV321M5X/NOPB and LPV321M7/NOPB from National Semiconductor, and MCP6231RT-E/OT and MCP6231T-E/OT from Microchip Technology, provide functional alternatives with different electrical trade-offs. National Semiconductor LPV321 variants maintain identical electrical specifications to the Texas Instruments LPV321 series. Microchip MCP6231 devices offer superior input bias current (1 pA), wider supply voltage range (1.8–6 V), and extended operating temperature (-40°C to 125°C), but with slightly higher slew rate (0.15 V/µs) and input offset voltage (5 mV).

Parameter Comparison

Parameter	LPV321IDBVRE4	LPV321M5/NOPB	LMV321M5/NOPB	LMV321M5X/NOPB	LMV321M7/NOPB	LMV321M7X/NOPB	LPV321M5X/NOPB (NS)	LPV321M7/NOPB (NS)	MCP6231RT-E/OT	MCP6231T-E/OT
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor	National Semiconductor	Microchip Technology	Microchip Technology
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
Amplifier Type	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
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
Slew Rate (V/µs)	0.1	0.1	1	1	1	1	0.1	0.1	0.15	0.15
Gain Bandwidth Product (kHz)	237	152	1000	1000	1000	1000	152	152	300	300
Current - Input Bias (nA)	2	2	15	15	15	15	2	2	0.001	0.001
Voltage - Input Offset (mV)	1.5	1.5	1.7	1.7	1.7	1.7	1.5	1.5	5	5
Current - Supply (µA)	9	9	130	130	130	130	9	9	20	20
Voltage - Supply Span Min (V)	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	1.8	1.8
Voltage - Supply Span Max (V)	5	5	5.5	5.5	5.5	5.5	5	5	6	6
Operating Temperature (°C)	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 125	-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
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	SC-74A, SOT-753	5-TSSOP, SC-70-5, SOT-353	SC-74A, SOT-753	SC-74A, SOT-753
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SC-70-5	SC-70-5	SOT-23-5	SC-70-5	SOT-23-5	SOT-23-5
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified	Not Specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Specified	Not Specified	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	Not Specified	Not Specified	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

For Direct Functional Equivalence with Active Product Status: The LPV321M5/NOPB and LPV321M5X/NOPB (Texas Instruments, SOT-23-5 package) are the primary recommended substitutes. These maintain identical electrical specifications to the LPV321IDBVRE4 while offering active product status, ensuring long-term availability and supply chain reliability. Both are ROHS3 compliant with MSL 1 rating and REACH unaffected status. The LPV321M7/NOPB and LPV321M7X/NOPB provide equivalent electrical performance in the SC-70-5 package format for space-constrained applications.

For Enhanced Performance Requirements: The LMV321 series (LMV321M5/NOPB, LMV321M5X/NOPB, LMV321M7/NOPB, LMV321M7X/NOPB) offers superior dynamic performance with 10× higher slew rate (1 V/µs) and 4–6× higher gain bandwidth product (1 MHz). These devices maintain identical supply voltage range and package compatibility while providing active product status. Trade-offs include increased supply current (130 µA versus 9 µA) and reduced operating temperature range (-40°C to 85°C versus -40°C to 125°C). Selection of LMV321 variants is appropriate for applications requiring faster signal processing or higher frequency response.

For Extended Operating Temperature Range: The MCP6231RT-E/OT and MCP6231T-E/OT (Microchip Technology) maintain the -40°C to 125°C operating temperature range of the original LPV321IDBVRE4. These devices offer superior input bias current (1 pA), wider supply voltage range (1.8–6 V), and ROHS3 compliance. Trade-offs include higher input offset voltage (5 mV) and slightly elevated slew rate (0.15 V/µs). These are suitable for temperature-critical applications requiring extended thermal performance.

For National Semiconductor LPV321 Variants: The LPV321M5X/NOPB and LPV321M7/NOPB from National Semiconductor provide electrical equivalence to the Texas Instruments LPV321 series with identical specifications. However, RoHS and REACH compliance status is not specified for these parts. Selection should be limited to applications where compliance documentation is not required or where alternative sourcing is necessary.

Frequently Asked Questions (FAQ)

Q1: Can the LMV321 series directly replace the LPV321IDBVRE4 without circuit modifications?

A: The LMV321 series maintains identical supply voltage range (2.7–5.5 V), package footprint options (SOT-23-5 and SC-70-5), and rail-to-rail output topology. Pin configuration is identical. However, the LMV321 exhibits 10× higher slew rate and 4–6× higher gain bandwidth product. In applications where the original LPV321 slew rate (0.1 V/µs) was a design constraint, the LMV321 may introduce different transient response characteristics. Circuit simulation or bench testing is recommended for timing-critical applications. For general-purpose amplification with no specific slew rate requirements, direct substitution is valid.

Q2: What is the difference between SOT-23-5 and SC-70-5 packages?

A: Both packages are surface mount 5-pin configurations with identical electrical functionality. SOT-23-5 (also designated SC-74A or SOT-753) is a larger package measuring approximately 3.0 mm × 2.8 mm. SC-70-5 (also designated 5-TSSOP or SOT-353) is a smaller package measuring approximately 2.0 mm × 2.0 mm. Pin spacing and lead geometry differ between packages, requiring different PCB footprints. Selection depends on available board space and assembly equipment capability. Electrical performance is identical between packages for the same base product number.

Q3: Why does the LPV321IDBVRE4 show as obsolete?

A: The LPV321IDBVRE4 is classified as obsolete due to discontinued manufacturing by Texas Instruments. The LMV321 series represents the active successor product line, offering enhanced performance characteristics. Obsolete status indicates that new production has ceased, though existing inventory may remain available. For new designs or long-term production requirements, selection of active alternatives (LPV321M5/NOPB, LMV321 series, or MCP6231 series) ensures supply chain continuity and access to manufacturer technical support.

Q4: What are the compliance implications of selecting different substitute parts?

A: The Texas Instruments LPV321 and LMV321 series are ROHS3 compliant, MSL 1 rated, and REACH unaffected. The Microchip MCP6231 series maintains identical compliance status. National Semiconductor LPV321 variants do not specify RoHS or REACH compliance in the provided data. For applications requiring documented regulatory compliance (medical devices, automotive, industrial), selection should be limited to parts with explicit ROHS3 and REACH documentation. Texas Instruments and Microchip Technology parts satisfy these requirements.

Q5: How does supply current affect power consumption in battery-powered applications?

A: The LPV321IDBVRE4 and LPV321 series consume 9 µA quiescent supply current, making them suitable for ultra-low-power applications. The LMV321 series consumes 130 µA, representing a 14× increase. The MCP6231 series consumes 20 µA, a 2× increase. In battery-powered designs operating continuously, this difference directly impacts battery life. For example, in a 3.3 V system with 100 mA·h battery capacity, the LPV321 provides approximately 11,000 hours of operation, while the LMV321 provides approximately 770 hours. Selection should prioritize low-power variants (LPV321 or MCP6231) for battery-dependent applications.

Q6: Are there packaging format differences that affect procurement?

A: Yes. The LPV321IDBVRE4 is listed with unspecified packaging format. Substitute parts are available in multiple configurations: Cut Tape (CT) & Digi-Reel®, Tape & Reel (TR), and Bulk. These represent different delivery and handling formats for automated assembly. Cut Tape format is suitable for small-quantity manual assembly. Tape & Reel format is standard for high-volume automated pick-and-place assembly. Bulk format is used for manual handling or custom packaging. Electrical specifications are identical across packaging formats; selection depends on assembly process requirements and order quantity.

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