LPV324PWG4 Equivalent & Substitute Parts

Part Overview

The LPV324PWG4 is a general purpose operational amplifier manufactured by Texas Instruments, configured as a 4-circuit rail-to-rail device in a 14-TSSOP surface mount package. This part is classified as obsolete, though 769 units remain in stock as new original inventory.

The LPV324PWG4 is designed for low-power applications requiring rail-to-rail output capability across a 2.7V to 5V supply range. Due to its obsolete status, equivalent and substitute parts are necessary for new designs, long-term production continuity, and component availability assurance. Substitute parts must maintain functional compatibility while meeting the same mechanical and electrical constraints.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
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 (x4 Channels)	28	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
Package / Case	14-TSSOP (0.173", 4.40mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LPV324PWG4 is determined by the following critical parameters:

Mechanical Compatibility:

Package type: 14-TSSOP (0.173", 4.40mm Width)
Mounting type: Surface Mount
Pin count and footprint must match

Electrical Compatibility:

Number of circuits: 4 operational amplifiers per package
Output type: Rail-to-Rail capability
Supply voltage range: Minimum 2.7V, Maximum 5V (or higher)
Operating temperature range: -40°C to 85°C (or extended)

Performance Parameters:

Slew rate: 0.1V/µs or higher
Gain bandwidth product: 237 kHz or higher
Input bias current: 2 nA or lower (for low-power applications)
Input offset voltage: 1.5 mV or lower
Supply current: 28µA per 4 channels or lower (for low-power applications)
Output current per channel: 72 mA or higher

Substitute parts are grouped into two categories:

Category 1 - Direct Replacements (LPV324 Series): Parts maintaining identical electrical specifications and performance characteristics. These include LPV324MT/NOPB and LPV324MTX/NOPB, which preserve the original slew rate, gain bandwidth product, and low-power supply current profile.

Category 2 - Enhanced Performance Substitutes: Parts offering improved performance specifications while maintaining mechanical compatibility and core functional requirements. These include LMV324MT/NOPB, LMV324MTX/NOPB (higher slew rate and bandwidth), BD12734FVJ-E2 (improved offset voltage), BU7487FV-E2 and BU7487SFV-E2 (CMOS technology with higher slew rate), LMR344FVJ-E2 (improved offset voltage and output current), and LMR934FVJ-E2 (enhanced bandwidth and output current).

Category 3 - Alternative Technology Substitutes: Parts utilizing different amplifier technology (CMOS vs. bipolar) while meeting package and functional requirements. MCP6474-E/ST represents Microchip Technology's CMOS alternative with comparable performance.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (kHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
LPV324PWG4	Texas Instruments	Obsolete	0.1	237	2	1.5	28	72	2.7	5	-40 to 85	14-TSSOP
LPV324MT/NOPB	Texas Instruments	Active	0.1	152	2	1.5	28	16	2.7	5	-40 to 85	14-TSSOP
LPV324MTX/NOPB	Texas Instruments	Active	0.1	152	2	1.5	28	16	2.7	5	-40 to 85	14-TSSOP
LMV324MT/NOPB	Texas Instruments	Active	1	1000	15	1.7	410	160	2.7	5.5	-40 to 125	14-TSSOP
LMV324MTX/NOPB	Texas Instruments	Active	1	1000	15	1.7	410	160	2.7	5.5	-40 to 125	14-TSSOP
BD12734FVJ-E2	Rohm Semiconductor	Active	0.4	1000	50	1	1200	12	1.8	5	-40 to 85	14-TSSOP
BU7487FV-E2	Rohm Semiconductor	Active	10	10000	0.001	1	6000	12	3	5.5	-40 to 105	14-LSSOP
BU7487SFV-E2	Rohm Semiconductor	Active	10	10000	0.001	1	6000	12	3	5.5	-40 to 105	14-LSSOP
LMR344FVJ-E2	Rohm Semiconductor	Active	1	2000	0.001	0.25	400	113	2.7	5.5	-40 to 85	14-TSSOP
LMR934FVJ-E2	Rohm Semiconductor	Active	0.35	1400	5	1	250	90	1.8	5	-40 to 85	14-TSSOP
MCP6474-E/ST	Microchip Technology	Active	1.1	2000	0.001	1.5	100	32	2	5.5	-40 to 125	14-TSSOP

Engineering Selection Recommendations

For Direct Replacement (Obsolete Part Substitution):

LPV324MT/NOPB and LPV324MTX/NOPB are the primary recommended substitutes. Both parts are active products from Texas Instruments, maintaining identical electrical specifications to the LPV324PWG4 including slew rate (0.1V/µs), input bias current (2 nA), input offset voltage (1.5 mV), and supply current (28µA). The primary difference is packaging format: LPV324MT/NOPB is supplied in Tube packaging, while LPV324MTX/NOPB is supplied in Tape & Reel format. Both are ROHS3 compliant with MSL 1 rating and support the -40°C to 85°C operating temperature range. LPV324MTX/NOPB offers the highest inventory availability (10,300 units).

For Enhanced Performance Applications:

LMV324MT/NOPB and LMV324MTX/NOPB provide improved performance with 10× higher slew rate (1V/µs) and 4× higher gain bandwidth product (1 MHz). These parts support extended temperature range (-40°C to 125°C) and higher supply voltage maximum (5.5V). Supply current increases to 410µA and output current to 160mA per channel. These substitutes are suitable when higher bandwidth and faster transient response are required.

For Low-Voltage Applications:

LMR934FVJ-E2 supports minimum supply voltage of 1.8V (versus 2.7V for the original part), enabling operation in battery-powered and low-voltage systems. This part maintains general purpose amplifier classification with 0.35V/µs slew rate and 1.4 MHz bandwidth, with improved output current capability (90mA per channel).

For Precision Applications:

LMR344FVJ-E2 offers superior input offset voltage (0.25µV versus 1.5mV) and input bias current (1pA versus 2nA), suitable for precision signal conditioning. This CMOS device provides 2 MHz bandwidth and 113mA output current per channel.

For High-Speed Applications:

BU7487FV-E2 and BU7487SFV-E2 deliver CMOS technology with 10V/µs slew rate and 10 MHz gain bandwidth product. These parts are suitable for high-frequency signal processing but require minimum 3V supply and consume higher supply current (6mA). Operating temperature extends to 105°C.

For Multi-Vendor Sourcing:

MCP6474-E/ST from Microchip Technology provides an alternative source for 4-circuit rail-to-rail amplifiers in 14-TSSOP package. This CMOS device offers 1.1V/µs slew rate, 2 MHz bandwidth, and extended temperature range (-40°C to 125°C). Supply voltage minimum is 2V, enabling ultra-low-voltage applications.

All recommended substitutes maintain ROHS3 compliance and are classified as active products with established supply chains.

Frequently Asked Questions (FAQ)

Q1: Can LPV324MT/NOPB directly replace LPV324PWG4 without circuit modifications?

A: Yes. LPV324MT/NOPB maintains identical electrical specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, and supply current. The 14-TSSOP package footprint is identical. The only difference is packaging format (Tube versus the original packaging). No circuit modifications are required.

Q2: What is the difference between LPV324MTX/NOPB and LPV324MT/NOPB?

A: Both parts are electrically identical. LPV324MT/NOPB is supplied in Tube packaging, while LPV324MTX/NOPB is supplied in Tape & Reel format. LPV324MTX/NOPB has higher inventory availability (10,300 units) and MSL 1 rating. Selection depends on assembly process requirements and volume.

Q3: Why would I choose LMV324 over LPV324 as a substitute?

A: LMV324 series offers 10× higher slew rate (1V/µs versus 0.1V/µs) and 4× higher bandwidth (1 MHz versus 237 kHz). Choose LMV324 when faster signal response and higher frequency operation are required. Trade-off is higher supply current (410µA versus 28µA).

Q4: Are CMOS substitutes (BU7487, MCP6474) compatible with circuits designed for bipolar amplifiers (LPV324)?

A: CMOS substitutes offer superior input bias current (1pA versus 2nA) and slew rate (10V/µs for BU7487, 1.1V/µs for MCP6474). However, they may exhibit different input impedance characteristics and noise performance. Circuit validation is necessary when switching amplifier technology. Package compatibility (14-TSSOP or 14-LSSOP) must be verified.

Q5: What is the significance of the MSL (Moisture Sensitivity Level) rating?

A: MSL 1 indicates unlimited shelf life without moisture bake-out requirements. MSL 2 (as specified for LMV324MTX/NOPB) requires moisture bake-out after 1 year of storage. For long-term inventory management, MSL 1 parts are preferred.

Q6: Can I use BU7487FV-E2 in a 2.7V supply application?

A: No. BU7487FV-E2 requires minimum 3V supply voltage. The original LPV324PWG4 operates at 2.7V minimum. For 2.7V applications, use LPV324MT/NOPB, LMV324MT/NOPB, or LMR934FVJ-E2 (which supports 1.8V minimum).

Q7: What is the package difference between 14-TSSOP and 14-LSSOP?

A: Both are 14-pin surface mount packages with 0.173" width and 4.40mm body width. 14-LSSOP (used by BU7487 series) has slightly different lead geometry compared to 14-TSSOP. PCB footprints are similar but not identical. Verify footprint compatibility before substitution.

Q8: Which substitute offers the best low-power performance?

A: LPV324MT/NOPB and LPV324MTX/NOPB maintain the original 28µA supply current specification. MCP6474-E/ST offers 100µA supply current with CMOS technology. For ultra-low-power applications, the LPV324 series is optimal.

Q9: What is the temperature range difference between LPV324 and LMV324?

A: LPV324 operates -40°C to 85°C. LMV324 extends to -40°C to 125°C. For industrial and automotive applications requiring extended temperature range, LMV324 is preferred.

Q10: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements equivalent to the original LPV324PWG4.

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