LP324PW Equivalent & Substitute Parts

Part Overview

The LP324PW is a general-purpose operational amplifier manufactured by Texas Instruments, configured as a 4-circuit integrated circuit in 14-TSSOP surface mount packaging. This device is classified as Last Time Buy, indicating discontinued production with limited inventory (806 pcs). The LP324PW operates across a supply voltage range of 3V to 32V with low input bias current (2 nA) and moderate slew rate (0.05V/µs), making it suitable for low-power analog signal processing applications.

Substitute parts are necessary due to the Last Time Buy status of the LP324PW. Alternative configurations from the same manufacturer and cross-manufacturer equivalents provide continued design support and extended component availability for new production runs and long-term system maintenance.

Key Parameters

Parameter	LP324PW Value	Unit	Substitution Relevance
Amplifier Type	General Purpose	—	Core functional classification
Number of Circuits	4	Channels	Must match for pin compatibility
Package / Case	14-TSSOP (0.173", 4.40mm Width)	—	Physical and electrical footprint
Voltage - Supply Span (Min)	3	V	Minimum operating voltage
Voltage - Supply Span (Max)	32	V	Maximum operating voltage
Operating Temperature	0°C ~ 70°C	—	Thermal operating range
Current - Input Bias	2	nA	Input stage leakage current
Voltage - Input Offset	2	mV	DC offset specification
Current - Supply	85µA (x4 Channels)	—	Total quiescent current
Current - Output / Channel	10	mA	Output drive capability
Slew Rate	0.05	V/µs	Transient response speed
Gain Bandwidth Product	100	kHz	Frequency response characteristic
Mounting Type	Surface Mount	—	Assembly process compatibility
RoHS Status	ROHS3 Compliant	—	Environmental compliance
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—	Storage and handling requirements

Substitute Part Grouping Explanation

Substitution logic for the LP324PW is based on strict electrical and mechanical parameter matching within the general-purpose operational amplifier category. The following criteria determine valid substitutes:

Primary Matching Criteria:

Number of circuits: Must be 4-channel configuration
Package type: 14-TSSOP surface mount footprint (0.173", 4.40mm width)
Supply voltage range: Minimum 3V, maximum ≥32V
Input offset voltage: ≤2 mV
Input bias current: ≤2 nA (preferred) or ≤20 nA (acceptable for general-purpose applications)
Output current per channel: ≥10 mA
Operating temperature: Must encompass 0°C to 70°C minimum

Secondary Compatibility Factors:

Slew rate: 0.05V/µs to 10V/µs (application-dependent)
Gain bandwidth product: 100 kHz to 4 MHz (application-dependent)
Current supply: 85µA to 8mA (application-dependent)
RoHS3 compliance and MSL rating for manufacturing compatibility

Substitutes are grouped into two categories: Direct LP324 Series Variants (identical electrical specifications, different packaging) and Cross-Manufacturer Equivalents (compatible electrical parameters, alternative sourcing).

Parameter Comparison

Part Number	Manufacturer	Package	Slew Rate (V/µs)	GBW (kHz)	Input Bias (nA)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	Supply Max (V)	Status
LP324PW	Texas Instruments	14-TSSOP Tube	0.05	100	2	0.085	10	0 ~ 70	32	Last Time Buy
LP324PWR	Texas Instruments	14-TSSOP TR	0.05	100	2	0.085	10	0 ~ 70	32	Active
LP324MT/NOPB	Texas Instruments	14-TSSOP Tube	0.05	100	2	0.085	10	0 ~ 70	32	Active
LP324MTX/NOPB	Texas Instruments	14-TSSOP TR	0.05	100	2	0.085	10	0 ~ 70	32	Active
LM324MT/NOPB	Texas Instruments	14-TSSOP Tube	—	1000	45	1.5	40	0 ~ 70	32	Active
LM324MTX/NOPB	Texas Instruments	14-TSSOP CT/DR	—	1000	45	1.5	40	0 ~ 70	32	Active
AS324GTR-E1	Diodes Incorporated	14-TSSOP TR	—	—	20	1.0	40	-40 ~ 85	36	Active
BA10324AFV-E2	Rohm Semiconductor	14-LSSOP CT/DR	0.2	500	20	0.6	35	-40 ~ 85	32	Active
BA2902FV-E2	Rohm Semiconductor	14-LSSOP CT/DR	0.2	500	20	0.7	30	-40 ~ 125	32	Active
BA3474FVJ-E2	Rohm Semiconductor	14-TSSOP CT/DR	10	4000	100	8.0	30	-40 ~ 85	36	Active
LM224DTBR2G	onsemi	14-TSSOP TR	—	1000	90	—	40	-25 ~ 85	32	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance):

LP324PWR, LP324MT/NOPB, and LP324MTX/NOPB are direct electrical equivalents to LP324PW. These parts maintain identical slew rate (0.05V/µs), gain bandwidth product (100 kHz), input bias current (2 nA), and output current specifications (10 mA). Selection among these variants depends solely on packaging format: LP324PWR and LP324MTX/NOPB are supplied in Tape & Reel format suitable for automated assembly, while LP324MT/NOPB is supplied in Tube format. All three are Active status products with ROHS3 compliance and MSL 1 rating, ensuring long-term availability and manufacturing compatibility.

Compatible Substitutes (Enhanced Performance Parameters):

LM324MT/NOPB and LM324MTX/NOPB offer higher gain bandwidth product (1 MHz) and greater output current capability (40 mA) compared to LP324PW, with acceptable input bias current (45 nA). These parts are suitable for applications requiring faster transient response. AS324GTR-E1 from Diodes Incorporated provides extended operating temperature range (-40°C to 85°C) and higher maximum supply voltage (36V), with comparable input bias current (20 nA) and output current (40 mA).

Alternative Sourcing (Cross-Manufacturer Options):

BA10324AFV-E2 and BA2902FV-E2 from Rohm Semiconductor provide alternative sourcing with 14-LSSOP packaging (mechanically compatible with 14-TSSOP footprint). BA2902FV-E2 extends operating temperature to -40°C to 125°C, suitable for industrial applications. BA3474FVJ-E2 offers significantly enhanced performance (10V/µs slew rate, 4 MHz gain bandwidth product) for applications requiring higher-speed operation, though with increased input bias current (100 nA) and supply current (8 mA).

LM224DTBR2G from onsemi provides 1 MHz gain bandwidth product and 40 mA output current with extended temperature range (-25°C to 85°C), suitable for industrial temperature environments.

Selection Criteria:

For direct replacement with maximum availability: Select LP324PWR (Tape & Reel) or LP324MT/NOPB (Tube)
For enhanced performance and extended temperature range: Select AS324GTR-E1 or BA2902FV-E2
For high-speed applications: Select BA3474FVJ-E2
For industrial temperature requirements: Select LM224DTBR2G or BA2902FV-E2

All recommended substitutes maintain ROHS3 compliance and are classified as Active products, ensuring regulatory compliance and long-term supply continuity.

Frequently Asked Questions (FAQ)

Q1: Can LP324PWR be used as a direct replacement for LP324PW?

Yes. LP324PWR is electrically identical to LP324PW with matching slew rate (0.05V/µs), gain bandwidth product (100 kHz), input bias current (2 nA), and output current (10 mA). The only difference is packaging format: LP324PWR is supplied in Tape & Reel format while LP324PW is supplied in Tube format. Both are 14-TSSOP surface mount packages with identical pinout and electrical performance.

Q2: What is the difference between 14-TSSOP and 14-LSSOP packaging?

14-TSSOP (Thin Shrink Small Outline Package) and 14-LSSOP (Low-profile Shrink Small Outline Package) are mechanically compatible surface mount packages with identical 0.173" width and 4.40mm body dimensions. Both accommodate the same PCB footprint and solder reflow process. The primary difference is internal lead frame geometry, which does not affect electrical performance or mechanical compatibility for this operational amplifier category.

Q3: Why does LM324MT/NOPB have higher input bias current (45 nA) than LP324PW (2 nA)?

LM324MT/NOPB uses LinCMOS™ technology with higher gain bandwidth product (1 MHz versus 100 kHz) and greater output current capability (40 mA versus 10 mA). This enhanced performance results in higher input bias current as a trade-off. For applications sensitive to input bias current, LP324 series variants maintain the 2 nA specification. For applications requiring faster response or higher output drive, LM324 series variants are appropriate despite higher input bias current.

Q4: Can BA3474FVJ-E2 replace LP324PW in all applications?

BA3474FVJ-E2 is not a direct replacement. While it maintains 4-circuit configuration and 14-TSSOP packaging, it has significantly different electrical characteristics: 10V/µs slew rate (versus 0.05V/µs), 4 MHz gain bandwidth product (versus 100 kHz), and 100 nA input bias current (versus 2 nA). BA3474FVJ-E2 is suitable only for applications requiring high-speed operation. For low-power, low-frequency applications, LP324 or LM324 series variants are appropriate.

Q5: What is the significance of Product Status (Last Time Buy vs. Active)?

Last Time Buy status indicates the manufacturer has discontinued production and will not accept new orders after a specified date. LP324PW is Last Time Buy with limited inventory (806 pcs). Active status products (LP324PWR, LP324MT/NOPB, LM324MT/NOPB, and cross-manufacturer alternatives) have indefinite production availability. For new designs and long-term production, Active status products are recommended to ensure supply continuity.

Q6: Are all substitute parts ROHS3 compliant?

Yes. All substitute parts listed maintain ROHS3 compliance, confirming absence of restricted substances (lead, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and bis(2-ethylhexyl) phthalate). This compliance is mandatory for commercial and industrial applications in regulated markets.

Q7: What does MSL 1 (Unlimited) mean for component handling?

MSL (Moisture Sensitivity Level) 1 indicates the component has unlimited shelf life without special moisture control measures. Components can be stored at standard ambient conditions (23°C ± 2°C, 45% to 75% relative humidity) without desiccant packaging or dry storage requirements. This simplifies inventory management and reduces handling costs compared to higher MSL ratings.

Q8: Can I use AS324GTR-E1 in a 0°C to 70°C application?

Yes. AS324GTR-E1 has operating temperature range of -40°C to 85°C, which encompasses the 0°C to 70°C requirement. However, AS324GTR-E1 has higher input bias current (20 nA versus 2 nA) and lacks specified slew rate and gain bandwidth product data. Verify application-specific performance requirements before selection.

Q9: What is the advantage of BA2902FV-E2 over LP324PW?

BA2902FV-E2 extends operating temperature to -40°C to 125°C (versus 0°C to 70°C), making it suitable for industrial and automotive applications. It maintains identical supply voltage range (3V to 32V) and input offset voltage (2 mV). Trade-offs include higher input bias current (20 nA versus 2 nA), higher supply current (0.7mA versus 0.085mA), and lower output current (30 mA versus 10 mA). Selection depends on temperature requirements and power budget constraints.

Q10: How do I verify pin compatibility between substitute parts?

All listed substitute parts maintain 14-pin TSSOP or LSSOP surface mount configuration with identical pinout for 4-circuit operational amplifier topology. Verify pinout compatibility by cross-referencing manufacturer datasheets for pin assignments (non-inverting input, inverting input, output, power supply, and ground pins for each of the four amplifier circuits). Physical footprint compatibility is confirmed by matching package designation (14-TSSOP or 14-LSSOP with 0.173" width).

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