LPV321DBVR Equivalent & Substitute Parts

Part Overview

The LPV321DBVR is a general-purpose operational amplifier manufactured by Texas Instruments, packaged in SOT-23-5 (SC-74A) surface mount configuration. This device is classified as obsolete, indicating discontinued production and limited availability. The LPV321DBVR features rail-to-rail output capability with low power consumption, making it suitable for battery-powered and low-voltage applications. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for new designs and ongoing production requirements.

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 85	°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 (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LPV321DBVR are categorized into two functional groups based on electrical performance and package compatibility:

Group 1: Direct Electrical Equivalents (LPV321 Series - Low Slew Rate) Parts LPV321M5/NOPB, LPV321M5X/NOPB, LPV321M7/NOPB, and LPV321M7X/NOPB maintain the original LPV321 electrical characteristics: 0.1 V/µs slew rate, 152 kHz gain bandwidth product, 2 nA input bias current, and 9 µA supply current. These parts differ only in packaging format (SOT-23-5 versus SC-70-5) and tape/reel configuration. All are manufactured by National Semiconductor or Texas Instruments and carry active product status.

Group 2: Enhanced Performance Alternatives (LMV321 and AZV321 Series - High Slew Rate) Parts LMV321M5/NOPB, LMV321M5X/NOPB, LMV321M7/NOPB, LMV321M7X/NOPB, AZV321KTR-E1, and AZV321KTR-G1 provide improved electrical performance with 1 V/µs slew rate and 1 MHz gain bandwidth product. These parts operate within the same supply voltage range (2.7 V to 5.5 V) and temperature range (-40°C to 85°C) as the original device. Higher supply current (130 µA) and output current (160 mA) are trade-offs for enhanced bandwidth. All are active products from Texas Instruments or Diodes Incorporated.

Substitution Criteria:

Rail-to-rail output capability (required)
Single-circuit general-purpose amplifier topology (required)
Supply voltage range compatibility: minimum 2.7 V, maximum 5 V or higher (required)
Operating temperature range: -40°C to 85°C (required)
Surface mount packaging: SOT-23-5 or SC-70-5 (required)
Active product status (preferred for new designs)

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Slew Rate (V/µs)	GBW (kHz)	Input Bias (nA)	Supply Current (µA)	Output Current (mA)	Supply Span (V)	Inventory (Pcs)
LPV321DBVR	Texas Instruments	Obsolete	SOT-23-5	0.1	237	2	9	72	2.7–5	3287
LPV321M5/NOPB	Texas Instruments	Active	SOT-23-5	0.1	152	2	9	—	2.7–5	1605
LPV321M5X/NOPB	National Semiconductor	Active	SOT-23-5	0.1	152	2	9	—	2.7–5	10100
LPV321M7/NOPB	National Semiconductor	Active	SC-70-5	0.1	152	2	9	—	2.7–5	18251
LPV321M7X/NOPB	National Semiconductor	Active	SC-70-5	0.1	152	2	9	—	2.7–5	10200
LMV321M5/NOPB	Texas Instruments	Active	SOT-23-5	1	1000	15	130	160	2.7–5.5	7100
LMV321M5X/NOPB	Texas Instruments	Active	SOT-23-5	1	1000	15	130	—	2.7–5.5	65100
LMV321M7/NOPB	Texas Instruments	Active	SC-70-5	1	1000	15	130	160	2.7–5.5	25100
LMV321M7X/NOPB	Texas Instruments	Active	SC-70-5	1	1000	15	130	—	2.7–5.5	35200
AZV321KTR-E1	Diodes Incorporated	Active	SOT-23-5	1	1000	250	130	160	2.7–5.5	9300
AZV321KTR-G1	Diodes Incorporated	Active	SOT-23-5	1	1000	250	130	160	2.7–5.5	35400

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): Select LPV321M5/NOPB, LPV321M5X/NOPB, LPV321M7/NOPB, or LPV321M7X/NOPB when the original LPV321DBVR electrical characteristics must be preserved. These parts maintain 0.1 V/µs slew rate, 152 kHz gain bandwidth product, and 9 µA supply current. All are active products with ROHS3 compliance and unlimited moisture sensitivity rating. Package selection depends on PCB layout requirements: SOT-23-5 for standard surface mount or SC-70-5 for space-constrained applications.

For Enhanced Performance Applications: Select LMV321M5/NOPB, LMV321M5X/NOPB, LMV321M7/NOPB, or LMV321M7X/NOPB when higher bandwidth (1 MHz) and faster slew rate (1 V/µs) are beneficial. These parts support extended supply voltage to 5.5 V and deliver higher output current (160 mA). Increased supply current (130 µA) is the trade-off for improved performance. All are active Texas Instruments products with ROHS3 compliance.

For Alternative Sourcing: Select AZV321KTR-E1 or AZV321KTR-G1 (Diodes Incorporated) as secondary sources for enhanced-performance requirements. These parts provide identical electrical specifications to the LMV321 series with 1 V/µs slew rate and 1 MHz bandwidth. Moisture sensitivity level is 3 (168 hours) compared to level 1 for Texas Instruments alternatives. Both are active products with ROHS3 compliance and high inventory availability.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and EAR99 export classification matching the original LPV321DBVR. REACH status is unaffected across all alternatives. Moisture sensitivity level 1 (unlimited) is available in LPV321 series; level 3 (168 hours) applies to AZV321 series.

Frequently Asked Questions (FAQ)

Q: Can LMV321 parts directly replace LPV321DBVR in existing designs? A: LMV321 parts are electrically compatible within the same supply voltage range (2.7 V to 5 V minimum) and temperature range (-40°C to 85°C). However, LMV321 parts feature higher slew rate (1 V/µs versus 0.1 V/µs) and higher supply current (130 µA versus 9 µA). Designs sensitive to power consumption or requiring the original low slew rate should use LPV321M5/NOPB or equivalent instead.

Q: What is the difference between SOT-23-5 and SC-70-5 packages? A: Both packages are surface mount configurations with identical electrical performance. SOT-23-5 (SC-74A) is larger and more commonly used in standard applications. SC-70-5 (5-TSSOP, SOT-353) is smaller and suitable for space-constrained PCB layouts. Package selection depends solely on available board space and assembly equipment capability.

Q: Are tape and reel (TR) and cut tape (CT) versions functionally equivalent? A: Yes. Tape and reel packaging and cut tape packaging contain identical die and electrical performance. The difference is in delivery format for automated assembly. Tape and reel is standard for high-volume production; cut tape is used for lower-volume or manual assembly applications.

Q: Why do AZV321 parts have higher input bias current (250 nA) compared to LPV321 (2 nA)? A: Input bias current is a fundamental characteristic of the amplifier design. AZV321 parts from Diodes Incorporated use a different internal architecture than LPV321 or LMV321 parts. For applications requiring very low input bias current, select LPV321M5/NOPB or LMV321 series instead.

Q: Can I use LPV321M7/NOPB (SC-70-5 package) as a substitute for LPV321DBVR (SOT-23-5 package)? A: Yes, if your PCB layout accommodates the SC-70-5 package footprint. Electrical performance is identical. The SC-70-5 package is physically smaller, so verify that your assembly process and board space support this package before substitution.

Q: What inventory levels should I consider for long-term supply? A: LMV321M5X/NOPB has the highest inventory (65,100 pcs), followed by LMV321M7X/NOPB (35,200 pcs) and AZV321KTR-G1 (35,400 pcs). For designs requiring the original LPV321 electrical characteristics, LPV321M7/NOPB (18,251 pcs) and LPV321M7X/NOPB (10,200 pcs) provide adequate supply. Original LPV321DBVR inventory (3,287 pcs) is limited due to obsolete status.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification. The original LPV321DBVR is also ROHS3 compliant. REACH status is unaffected for all parts.

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