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LMV321IDBVRG4 Equivalent & Substitute Parts
Part Overview
The LMV321IDBVRG4 is a general-purpose operational amplifier manufactured by Texas Instruments, packaged in SOT-23-5 surface mount configuration. This device features rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications. The part is currently discontinued at DiGi Electronics, with 4260 units available from existing inventory. Due to its discontinued status, identifying equivalent and substitute parts is necessary for design continuity and procurement planning.
Substiute Parts
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 125 | °C |
| Package / Case | SC-74A, SOT-753 | — |
| Supplier Device Package | SOT-23-5 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the LMV321IDBVRG4 are grouped based on the following criteria:
Primary Substitution Criteria:
- Amplifier Type: General Purpose
- Number of Circuits: 1
- Output Type: Rail-to-Rail
- Gain Bandwidth Product: 1 MHz
- Voltage Supply Range: Minimum 2.7 V, Maximum 5.5 V
- Package Type: SOT-23-5 or SC-70-5 (pin-compatible alternatives)
- RoHS3 Compliance
- Moisture Sensitivity Level: 1 (Unlimited)
Group 1: Direct SOT-23-5 Package Equivalents (Texas Instruments) Parts LMV321M5/NOPB and LMV321M5X/NOPB maintain identical electrical specifications to the main part with active product status. These are the closest functional equivalents.
Group 2: Manufacturer-Recommended Alternatives (Texas Instruments) Parts LMV321M7/NOPB and LMV321M7X/NOPB provide equivalent electrical performance in SC-70-5 package, requiring PCB layout modification but maintaining all critical electrical parameters.
Group 3: Cross-Manufacturer Equivalent (UMW) Part LMV321IDBVR from UMW provides functional equivalence with modified electrical characteristics (lower input bias current, reduced supply current) and extended lower supply voltage limit (2.1 V minimum).
Group 4: Low-Power Alternatives (Texas Instruments / National Semiconductor) Parts LPV321M5/NOPB, LPV321M5X/NOPB, LPV321M7/NOPB, and LPV321M7X/NOPB offer reduced power consumption (9 µA supply current) with trade-offs in slew rate (0.1 V/µs) and gain bandwidth product (152 kHz).
Group 5: Cross-Manufacturer Alternative (Diodes Incorporated) Part AZV321KTR-G1 provides equivalent electrical performance in SOT-23-5 package with higher input bias current (250 nA) and modified moisture sensitivity level (MSL 3).
Parameter Comparison
| Part Number | Manufacturer | Package | Slew Rate (V/µs) | GBW (MHz) | Input Bias (nA) | Input Offset (mV) | Supply Current (µA) | Output Current (mA) | Temp Range (°C) | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| LMV321IDBVRG4 | Texas Instruments | SOT-23-5 | 1 | 1 | 15 | 1.7 | 130 | 160 | -40 to 125 | Discontinued |
| LMV321M5/NOPB | Texas Instruments | SOT-23-5 | 1 | 1 | 15 | 1.7 | 130 | 160 | -40 to 85 | Active |
| LMV321M5X/NOPB | Texas Instruments | SOT-23-5 | 1 | 1 | 15 | 1.7 | 130 | — | -40 to 85 | Active |
| LMV321IDBVR | UMW | SOT-23-5 | — | 1 | 0.01 | 0.8 | 45 | 25 | -25 to 85 | Active |
| LMV321M7/NOPB | Texas Instruments | SC-70-5 | 1 | 1 | 15 | 1.7 | 130 | 160 | -40 to 85 | Active |
| LMV321M7X/NOPB | Texas Instruments | SC-70-5 | 1 | 1 | 15 | 1.7 | 130 | — | -40 to 85 | Active |
| LPV321M5/NOPB | Texas Instruments | SOT-23-5 | 0.1 | 0.152 | 2 | 1.5 | 9 | — | -40 to 85 | Active |
| LPV321M5X/NOPB | National Semiconductor | SOT-23-5 | 0.1 | 0.152 | 2 | 1.5 | 9 | — | -40 to 85 | Active |
| LPV321M7/NOPB | National Semiconductor | SC-70-5 | 0.1 | 0.152 | 2 | 1.5 | 9 | — | -40 to 85 | Active |
| LPV321M7X/NOPB | National Semiconductor | SC-70-5 | 0.1 | 0.152 | 2 | 1.5 | 9 | — | -40 to 85 | Active |
| AZV321KTR-G1 | Diodes Incorporated | SOT-23-5 | 1 | 1 | 250 | 1.7 | 130 | 160 | -40 to 85 | Active |
Engineering Selection Recommendations
For Direct Replacement (No Design Changes Required):
Select LMV321M5/NOPB or LMV321M5X/NOPB when immediate substitution is required. Both parts are manufactured by Texas Instruments with active product status, ROHS3 compliance, and unlimited moisture sensitivity rating. These parts maintain identical electrical specifications to the discontinued LMV321IDBVRG4 with the exception of operating temperature maximum (85°C versus 125°C). Inventory availability is substantial (7,100 and 65,100 units respectively).
For Package-Flexible Designs:
LMV321M7/NOPB and LMV321M7X/NOPB provide equivalent electrical performance in SC-70-5 package. These are suitable when PCB layout can accommodate the smaller 5-TSSOP footprint. Both maintain active status and ROHS3 compliance with 25,100 and 35,200 units in stock.
For Extended Lower Supply Voltage Applications:
LMV321IDBVR from UMW extends the minimum supply voltage to 2.1 V (versus 2.7 V for LMV321 variants). This part exhibits reduced input bias current (10 pA), lower input offset voltage (800 µV), and significantly reduced supply current (45 µA). Output current capability is limited to 25 mA. This part is suitable for ultra-low-voltage designs with reduced output drive requirements. Inventory is extensive (425,200 units).
For Power-Constrained Applications:
LPV321 series (LPV321M5/NOPB, LPV321M5X/NOPB, LPV321M7/NOPB, LPV321M7X/NOPB) reduces supply current to 9 µA with trade-offs in slew rate (0.1 V/µs) and gain bandwidth product (152 kHz). These parts are suitable for battery-powered or energy-harvesting applications where the reduced bandwidth is acceptable.
For Cross-Manufacturer Sourcing:
AZV321KTR-G1 from Diodes Incorporated provides SOT-23-5 package equivalence with active status. Input bias current is elevated to 250 nA, and moisture sensitivity level is MSL 3 (168 hours) versus MSL 1 (unlimited). This part is suitable when supply chain diversification is required.
Frequently Asked Questions (FAQ)
Q: Can LMV321M5/NOPB directly replace LMV321IDBVRG4 without circuit modification?
A: Yes. Both parts share identical electrical specifications including slew rate (1 V/µs), gain bandwidth product (1 MHz), input bias current (15 nA), input offset voltage (1.7 mV), supply current (130 µA), and output current (160 mA). The primary difference is operating temperature range: LMV321M5/NOPB operates to 85°C maximum versus 125°C for the discontinued part. If your application operates within -40°C to 85°C, direct substitution is valid.
Q: What is the difference between LMV321M5/NOPB and LMV321M7/NOPB?
A: The electrical specifications are identical. The difference is package type: LMV321M5/NOPB uses SOT-23-5 (8-pin small outline), while LMV321M7/NOPB uses SC-70-5 (5-pin thin small outline). SC-70-5 is physically smaller. Selection depends on PCB layout constraints and available footprint space.
Q: Why does LMV321IDBVR from UMW have different electrical specifications?
A: LMV321IDBVR is classified as a voltage feedback amplifier rather than general-purpose amplifier. It exhibits superior input bias current (10 pA versus 15 nA) and lower input offset voltage (800 µV versus 1.7 mV). However, output current is reduced to 25 mA versus 160 mA, and supply current is lower (45 µA). This part is suitable for precision, low-power applications but cannot drive heavy loads.
Q: Can LPV321 series parts replace LMV321IDBVRG4?
A: LPV321 parts are functionally compatible but with significant performance trade-offs. Slew rate is reduced to 0.1 V/µs (versus 1 V/µs), and gain bandwidth product is 152 kHz (versus 1 MHz). These parts are suitable only for applications where reduced bandwidth is acceptable, such as DC amplification or very low-frequency signal processing. They are not suitable for audio or higher-frequency applications.
Q: What is the significance of MSL (Moisture Sensitivity Level) rating?
A: MSL 1 (unlimited) indicates the component can be stored indefinitely without moisture absorption concerns. MSL 3 (168 hours) requires the component to be used within 168 hours of package opening or requires baking before reflow soldering. For high-volume manufacturing or long-term inventory, MSL 1 parts (LMV321 series) are preferred over MSL 3 parts (AZV321KTR-G1).
Q: Is the LMV321IDBVRG4 truly discontinued, or is it available from alternative sources?
A: The part is discontinued at DiGi Electronics with 4,260 units available from existing inventory. Discontinuation status applies to primary distributors. Alternative sources may have remaining stock, but long-term availability is not guaranteed. Active alternatives (LMV321M5/NOPB, LMV321M7/NOPB) are recommended for new designs.
Q: What are the compliance and certification differences between substitute parts?
A: All listed substitute parts are ROHS3 compliant and REACH unaffected. ECCN classification is EAR99 for all parts. Moisture sensitivity levels vary: LMV321 and LPV321 series are MSL 1 (unlimited), while AZV321KTR-G1 is MSL 3 (168 hours). For applications requiring extended storage or high-humidity environments, MSL 1 rated parts are preferred.
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