LM324APW Equivalent & Substitute Parts

Part Overview

The LM324APW is a general-purpose operational amplifier featuring four independent circuits in a 14-TSSOP surface mount package. Manufactured by Texas Instruments, this device operates across a 3V to 30V supply range with a 1.2 MHz gain bandwidth product and 0.5V/µs slew rate. The LM324APW is classified as Last Time Buy, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Key Parameters

Parameter	LM324APW Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	0.5	V/µs
Gain Bandwidth Product	1.2	MHz
Current - Input Bias	15	nA
Voltage - Input Offset	2	mV
Current - Supply (x4 Channels)	1.4	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	0 to 70	°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LM324APW are grouped based on electrical and mechanical compatibility within the following criteria:

Primary Substitution Criteria:

Four independent operational amplifier circuits
14-TSSOP or equivalent surface mount package (0.173", 4.40mm width)
Supply voltage range minimum of 3V and maximum of at least 30V
Input offset voltage of 2mV
General-purpose amplifier classification

Grouping Logic:

Group 1: Direct Texas Instruments Equivalents (Packaging Variants) Parts LM324APWR, LM324MT/NOPB, and LM324MTX/NOPB maintain identical electrical specifications to the LM324APW with variations in packaging format (Cut Tape & Digi-Reel versus Tube). These are functionally interchangeable with the main part.

Group 2: Texas Instruments LinCMOS Series (Performance Trade-offs) Parts LM324MT/NOPB and LM324MTX/NOPB belong to the LinCMOS series with reduced gain bandwidth product (1 MHz versus 1.2 MHz) and increased input bias current (45 nA versus 15 nA). These represent acceptable substitutes for applications not requiring the higher bandwidth specification.

Group 3: Low-Power Texas Instruments Variants (LP324 Series) Parts LP324MT/NOPB and LP324MTX/NOPB offer significantly reduced power consumption (85µA supply current versus 1.4mA) and lower gain bandwidth product (100 kHz). These are suitable only for applications where bandwidth requirements are minimal and power efficiency is prioritized.

Group 4: Rohm Semiconductor Alternatives (Package and Performance Variations) Parts BA10324AFV-E2, BA2902FV-E2, BA2902SFV-E2, and BA3474FVJ-E2 from Rohm Semiconductor provide four-circuit general-purpose amplifiers in compatible packages. These parts exhibit variations in slew rate, gain bandwidth product, and operating temperature ranges. BA3474FVJ-E2 offers enhanced performance (10V/µs slew rate, 4 MHz bandwidth) suitable for higher-speed applications.

Group 5: onsemi Alternative (Extended Temperature Range) Part LM224DTBR2G from onsemi provides four-circuit general-purpose amplification in 14-TSSOP packaging with extended lower operating temperature (-25°C versus 0°C) and comparable electrical characteristics.

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	Package	Status
LM324APW	Texas Instruments	0.5	1.2	15	1.4	30	0 to 70	14-TSSOP	Last Time Buy
LM324APWR	Texas Instruments	0.5	1.2	15	1.4	30	0 to 70	14-TSSOP	Active
LM324MT/NOPB	Texas Instruments	—	1.0	45	1.5	40	0 to 70	14-TSSOP	Active
LM324MTX/NOPB	Texas Instruments	—	1.0	45	1.5	40	0 to 70	14-TSSOP	Active
LP324MT/NOPB	Texas Instruments	0.05	0.1	2	0.085	10	0 to 70	14-TSSOP	Active
LP324MTX/NOPB	Texas Instruments	0.05	0.1	2	0.085	10	0 to 70	14-TSSOP	Active
BA10324AFV-E2	Rohm Semiconductor	0.2	0.5	20	0.6	35	-40 to 85	14-LSSOP	Active
BA2902FV-E2	Rohm Semiconductor	0.2	0.5	20	0.7	30	-40 to 125	14-LSSOP	Active
BA2902SFV-E2	Rohm Semiconductor	0.2	0.5	20	0.7	30	-40 to 105	14-LSSOP	Active
BA3474FVJ-E2	Rohm Semiconductor	10	4.0	100	8	30	-40 to 85	14-TSSOP	Active
LM224DTBR2G	onsemi	—	1.0	90	—	40	-25 to 85	14-TSSOP	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): LM324APWR is the primary recommended substitute. This part maintains all electrical specifications of the LM324APW while offering Active product status and improved supply availability. The difference between LM324APW (Tube packaging) and LM324APWR (Cut Tape & Digi-Reel) is packaging format only; electrical performance is identical. Both are ROHS3 compliant with MSL 1 rating.

For Applications Tolerant of Reduced Bandwidth: LM324MT/NOPB and LM324MTX/NOPB are suitable substitutes when the application does not require the full 1.2 MHz gain bandwidth product. These LinCMOS variants reduce bandwidth to 1 MHz and increase input bias current to 45 nA. Both maintain the 0°C to 70°C operating range and are ROHS3 compliant. Selection between MT/NOPB (Tube) and MTX/NOPB (Cut Tape & Digi-Reel) depends on packaging requirements.

For Power-Constrained Applications: LP324MT/NOPB and LP324MTX/NOPB reduce supply current to 85µA, representing a 16-fold reduction compared to the LM324APW. These substitutes are appropriate only for applications where bandwidth requirements are minimal (100 kHz maximum) and power efficiency is critical. Output current capability is reduced to 10 mA per channel.

For Extended Temperature Range Requirements: BA2902FV-E2 and BA2902SFV-E2 from Rohm Semiconductor extend the upper operating temperature to 125°C and 105°C respectively, compared to 70°C for the LM324APW. These parts operate across -40°C to 125°C or -40°C to 105°C ranges. Electrical performance differs with 0.5 MHz gain bandwidth product and 0.2V/µs slew rate. Both are ROHS3 compliant.

For High-Speed Applications: BA3474FVJ-E2 provides significantly enhanced performance with 10V/µs slew rate and 4 MHz gain bandwidth product. This substitute is appropriate when the application requires faster signal processing than the LM324APW specification. Operating temperature range extends to -40°C to 85°C. Supply current increases to 8mA. ROHS3 compliant.

For Industrial Temperature Range: LM224DTBR2G from onsemi extends the lower operating temperature to -25°C while maintaining the upper limit at 85°C. This part is suitable for industrial applications requiring extended low-temperature operation. Gain bandwidth product is 1 MHz with 90 nA input bias current. ROHS3 compliant.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and surface mount 14-TSSOP or equivalent packaging. Selection should be based on specific application requirements for bandwidth, power consumption, temperature range, and output current capability.

Frequently Asked Questions (FAQ)

Q: Can LM324APWR be used as a direct replacement for LM324APW? A: Yes. LM324APWR is electrically identical to LM324APW with identical slew rate (0.5V/µs), gain bandwidth product (1.2 MHz), input bias current (15 nA), and supply current (1.4mA). The only difference is packaging format: LM324APW is supplied in Tube packaging while LM324APWR is supplied in Cut Tape & Digi-Reel format. Both are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between LM324MT/NOPB and LM324MTX/NOPB? A: These parts are electrically identical. LM324MT/NOPB is supplied in Tube packaging while LM324MTX/NOPB is supplied in Cut Tape & Digi-Reel format. Both feature 1 MHz gain bandwidth product, 45 nA input bias current, and 1.5mA supply current. Selection depends on packaging and handling requirements for your manufacturing process.

Q: Can LP324 series parts replace LM324APW in all applications? A: No. LP324MT/NOPB and LP324MTX/NOPB are suitable only for applications where bandwidth requirements are minimal. These parts reduce gain bandwidth product to 100 kHz (compared to 1.2 MHz) and output current to 10 mA per channel (compared to 30 mA). Primary advantage is reduced power consumption (85µA versus 1.4mA). Verify application bandwidth and output current requirements before substitution.

Q: What are the package differences between 14-TSSOP and 14-LSSOP? A: Both 14-TSSOP and 14-LSSOP are surface mount packages with 0.173" width and 4.40mm body width. The primary difference is in lead configuration and pitch. Parts specified as 14-LSSOP (such as BA10324AFV-E2, BA2902FV-E2, BA2902SFV-E2) may require PCB layout verification before substitution. Confirm footprint compatibility with your design before implementation.

Q: Why does BA3474FVJ-E2 have higher supply current than LM324APW? A: BA3474FVJ-E2 is designed for higher-speed operation with 10V/µs slew rate and 4 MHz gain bandwidth product compared to LM324APW specifications of 0.5V/µs and 1.2 MHz. Enhanced performance requires increased quiescent current (8mA versus 1.4mA). This substitute is appropriate only when application requirements justify the increased power consumption.

Q: Can Rohm Semiconductor parts (BA series) be used interchangeably with Texas Instruments LM324 parts? A: Rohm Semiconductor BA series parts are functionally equivalent four-circuit general-purpose amplifiers in compatible packages. However, electrical specifications differ. BA10324AFV-E2, BA2902FV-E2, and BA2902SFV-E2 feature 0.5 MHz gain bandwidth product and 0.2V/µs slew rate compared to LM324APW specifications. BA3474FVJ-E2 offers enhanced performance. Verify specific application requirements for bandwidth, slew rate, and operating temperature before substitution.

Q: What is the significance of "Last Time Buy" status for LM324APW? A: Last Time Buy status indicates that Texas Instruments has discontinued production of LM324APW. Existing inventory may be available but will not be replenished. For new designs or long-term product support, LM324APWR (Active status) is the recommended substitute. For existing products currently using LM324APW, transition planning to an Active substitute part is necessary to ensure continued supply chain availability.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed (LM324APWR, LM324MT/NOPB, LM324MTX/NOPB, LP324MT/NOPB, LP324MTX/NOPB, BA10324AFV-E2, BA2902FV-E2, BA2902SFV-E2, BA3474FVJ-E2, and LM224DTBR2G) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level rating.

Q: What operating temperature range should I select for my application? A: LM324APW operates 0°C to 70°C. If your application requires extended temperature range, consider BA2902FV-E2 (-40°C to 125°C), BA2902SFV-E2 (-40°C to 105°C), BA10324AFV-E2 (-40°C to 85°C), BA3474FVJ-E2 (-40°C to 85°C), or LM224DTBR2G (-25°C to 85°C). Verify that extended temperature operation does not degrade other electrical specifications required by your design.

Q: How do I determine which substitute is appropriate for my design? A: Identify the critical electrical parameters for your application: gain bandwidth product, slew rate, input bias current, output current per channel, and operating temperature range. Compare these requirements against the parameter table provided. LM324APWR is the direct replacement. For applications with different requirements, select the substitute that meets or exceeds your specifications while maintaining compatibility with your PCB layout and packaging requirements.

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