LM324WPT Equivalent & Substitute Parts

Part Overview

The LM324WPT is a general-purpose operational amplifier manufactured by STMicroelectronics, configured as a 4-circuit integrated circuit in a 14-TSSOP surface mount package. This device is classified as a linear amplifier with push-pull output configuration, designed for general-purpose signal conditioning and amplification applications. The part is currently in active product status with 9384 units in stock.

Substitute parts are necessary when the original LM324WPT becomes unavailable, when alternative packaging formats are required, or when design specifications permit the use of functionally equivalent devices from alternative manufacturers. Substitute selection is determined by matching electrical parameters, package compatibility, and operating temperature ranges.

Substiute Parts

LM324WPT

STMicroelectronicsIn Stock: 9408LM324WPT Datasheet

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LM324ADTBR2G

onsemiIn Stock: 5005LM324ADTBR2G Datasheet

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ADA4062-4ARUZ

Analog Devices Inc.In Stock: 1440ADA4062-4ARUZ Datasheet

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ADA4062-4ARUZ-RL

Analog Devices Inc.In Stock: 1702ADA4062-4ARUZ-RL Datasheet

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LM2902KAVQPWRG4Q1

Texas InstrumentsIn Stock: 17482LM2902KAVQPWRG4Q1 Datasheet

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LM2902KVQPWRG4Q1

Texas InstrumentsIn Stock: 17351LM2902KVQPWRG4Q1 Datasheet

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LM324APW

Texas InstrumentsIn Stock: 105122LM324APW Datasheet

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LM324APWR

Texas InstrumentsIn Stock: 105224LM324APWR Datasheet

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LM324KAPW

Texas InstrumentsIn Stock: 1739LM324KAPW Datasheet

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LM324KAPWR

Texas InstrumentsIn Stock: 10227LM324KAPWR Datasheet

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TL034CPW

Texas InstrumentsIn Stock: 1999TL034CPW Datasheet

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TL034CPWR

Texas InstrumentsIn Stock: 1972TL034CPWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM324WPT are grouped into two categories based on amplifier type and electrical performance characteristics:

Category 1: General-Purpose Amplifier Substitutes These devices maintain the general-purpose amplifier classification and are compatible with applications requiring similar input bias current, input offset voltage, and supply voltage ranges. Substitutes in this category include the LM324ADTBR2G (onsemi), LM2902KAVQPWRG4Q1 (Texas Instruments), LM2902KVQPWRG4Q1 (Texas Instruments), LM324APW (Texas Instruments), LM324APWR (Texas Instruments), LM324KAPW (Texas Instruments), and LM324KAPWR (Texas Instruments). These parts share the 14-TSSOP package format and operate within compatible supply voltage ranges of 3V to 30V or 32V.

Category 2: J-FET Amplifier Substitutes These devices employ J-FET input architecture, resulting in significantly lower input bias current (2 pA versus 20 nA) and lower input offset voltage (750 µV versus 2 mV). J-FET substitutes include the ADA4062-4ARUZ (Analog Devices Inc.), ADA4062-4ARUZ-RL (Analog Devices Inc.), and TL034CPW (Texas Instruments). These parts are suitable for applications where ultra-low input bias current and offset voltage are required, though they require higher minimum supply voltage (10V minimum).

Substitution compatibility is determined by the following parameters: number of circuits (4), package format (14-TSSOP), mounting type (surface mount), and compliance certifications (ROHS3, REACH Unaffected, EAR99).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in Standard Applications: The LM324APWR and LM324KAPWR (Texas Instruments) are recommended as primary substitutes for the LM324WPT. Both devices maintain general-purpose amplifier classification, operate within the same supply voltage range (3V to 30V), and share identical input offset voltage specifications (2 mV). These parts are available in Cut Tape & Digi-Reel packaging and are in active product status. The LM324APWR has 105,200 units in stock, ensuring supply continuity.

For Extended Temperature Range Applications: The LM2902KAVQPWRG4Q1 and LM2902KVQPWRG4Q1 (Texas Instruments) extend the operating temperature range to -40°C to 125°C while maintaining general-purpose amplifier functionality. Both parts are AEC-Q100 qualified for automotive applications and are available in Tape & Reel packaging. These devices are designated as Last Time Buy status.

For Ultra-Low Input Bias Current Applications: The ADA4062-4ARUZ and ADA4062-4ARUZ-RL (Analog Devices Inc.) employ J-FET input architecture, delivering input bias current of 2 pA compared to 20 nA in the LM324WPT. These substitutes are suitable for high-impedance signal conditioning applications. The minimum supply voltage requirement is 10V, which must be verified against application constraints. Both variants are available in Tube and Cut Tape & Digi-Reel packaging respectively.

For High Slew Rate Applications: The TL034CPW (Texas Instruments) provides a slew rate of 5.1 V/µs, significantly higher than the LM324WPT specification of 0.4 V/µs. This J-FET device is suitable for applications requiring rapid signal transient response. The minimum supply voltage is 10V, and the device is available in Tube packaging with 1,900 units in stock.

For onsemi Source Preference: The LM324ADTBR2G (onsemi) maintains general-purpose amplifier classification with specifications closely aligned to the LM324WPT. This device supports supply voltages up to 32V and is available in Tape & Reel packaging with 4,922 units in stock.

All recommended substitutes are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.33.0001, matching the regulatory classification of the original part.

Frequently Asked Questions (FAQ)

Q: Can the LM324ADTBR2G directly replace the LM324WPT in all applications? A: The LM324ADTBR2G is functionally compatible with the LM324WPT for general-purpose amplifier applications. Both devices share identical package format (14-TSSOP), number of circuits (4), input offset voltage (2 mV), and supply current (1.5 mA). The primary difference is packaging format: LM324ADTBR2G is supplied in Tape & Reel format while LM324WPT is supplied in Bulk. The LM324ADTBR2G supports supply voltages up to 32V compared to 30V maximum for the LM324WPT, providing additional margin.

Q: What is the key difference between general-purpose and J-FET amplifier substitutes? A: General-purpose amplifiers (LM324 series, LM2902 series) employ bipolar input stages with input bias currents in the nanoampere range (15-40 nA). J-FET amplifiers (ADA4062, TL034) employ field-effect transistor input stages with input bias currents in the picoampere range (2 pA). J-FET devices are selected for applications requiring ultra-low input bias current and minimal input offset voltage drift. J-FET substitutes require higher minimum supply voltage (10V minimum) compared to general-purpose devices (3V minimum).

Q: Are the LM324APWR and LM324KAPWR interchangeable? A: The LM324APWR and LM324KAPWR are electrically identical, both manufactured by Texas Instruments with identical electrical specifications. The difference is packaging format: LM324APWR is supplied in Cut Tape & Digi-Reel format while LM324KAPWR is supplied in Tube format. Selection between these variants is determined by assembly process requirements and tape reel compatibility.

Q: Can the ADA4062-4ARUZ be used in applications designed for the LM324WPT? A: The ADA4062-4ARUZ is functionally compatible only in applications where the minimum supply voltage of 10V is available. The device shares the 14-TSSOP package format and 4-circuit configuration. However, the J-FET input architecture results in significantly different input bias current (2 pA versus 20 nA) and input offset voltage (750 µV versus 2 mV). Applications sensitive to input bias current or offset voltage drift must be re-evaluated for J-FET device characteristics.

Q: What is the significance of the AEC-Q100 qualification on the LM2902KAVQPWRG4Q1? A: AEC-Q100 qualification indicates the device meets automotive industry reliability and quality standards established by the Automotive Electronics Council. The LM2902KAVQPWRG4Q1 and LM2902KVQPWRG4Q1 are qualified for automotive applications and support extended operating temperature range (-40°C to 125°C). These devices are designated as Last Time Buy status, indicating production is being discontinued.

Q: Why does the TL034CPW have higher supply current consumption than the LM324WPT? A: The TL034CPW is a J-FET input amplifier with supply current of 870 µA per 4-channel device, compared to 1.5 mA for the LM324WPT. The higher slew rate (5.1 V/µs versus 0.4 V/µs) and lower input bias current (2 pA versus 20 nA) are characteristic of J-FET architecture. The TL034CPW is selected for applications requiring high-speed signal conditioning where increased power consumption is acceptable.

Q: Are all substitute parts available in the same packaging format as the LM324WPT? A: All substitute parts are available in 14-TSSOP surface mount package format, matching the LM324WPT package specification. However, packaging distribution formats differ: LM324WPT is supplied in Bulk format, while substitutes are available in Tube, Tape & Reel, or Cut Tape & Digi-Reel formats. Assembly process compatibility must be verified before selection.

Q: What is the product status significance of "Last Time Buy" designation? A: Last Time Buy status indicates the manufacturer is discontinuing production of that specific part number. Devices with this designation include LM2902KAVQPWRG4Q1, LM2902KVQPWRG4Q1, LM324APW, and TL034CPW. These parts remain available in current inventory but will not be manufactured after a specified cutoff date. For long-term supply continuity, parts with Active status (LM324APWR, LM324KAPWR, LM324ADTBR2G) are preferred.