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LM324KAPWRG4 Equivalent & Substitute Parts
Part Overview
The LM324KAPWRG4 is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-TSSOP surface mount package. This part is classified as obsolete, though 979 units remain in stock as new original inventory. The LM324KAPWRG4 operates across a supply voltage range of 3V to 30V and is suitable for general-purpose amplification applications requiring low input bias current and moderate bandwidth characteristics.
Due to the obsolete status of the LM324KAPWRG4, identifying equivalent and substitute parts is necessary for design continuity, long-term component availability, and production planning. Active alternatives with identical or compatible electrical and mechanical specifications are available from Texas Instruments and other manufacturers.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Package / Case | 14-TSSOP (0.173", 4.40mm Width) | — |
| Mounting Type | Surface Mount | — |
| Slew Rate | 0.5 | V/µs |
| Gain Bandwidth Product | 1.2 | MHz |
| Current - Input Bias | 15 | nA |
| Voltage - Input Offset | 2 | mV |
| Current - Supply | 1.4 | mA (x4 Channels) |
| Current - Output / Channel | 30 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 30 | V |
| Operating Temperature | 0 to 70 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LM324KAPWRG4 is determined by the following critical parameters: amplifier type (general purpose), number of circuits (4), package type (14-TSSOP), mounting method (surface mount), and electrical specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current per channel, and supply voltage range.
Substitute parts are grouped into two categories based on electrical performance alignment:
Category 1: Direct Electrical Equivalents — Parts with matching or superior electrical specifications and identical 14-TSSOP packaging. These include the LM324KAPWR, LM324MT/NOPB, and LM324MTX/NOPB from Texas Instruments, all featuring the same 4-circuit general-purpose amplifier configuration with compatible supply voltage ranges (3V to 30V or 32V) and operating temperatures within or overlapping the original specification.
Category 2: Compatible Alternatives with Performance Variations — Parts that maintain the 4-circuit general-purpose amplifier configuration and 14-TSSOP packaging but with different electrical characteristics. The LP324MT/NOPB and LP324MTX/NOPB offer significantly lower supply current (85µA versus 1.4mA) and reduced gain bandwidth product (100 kHz versus 1.2 MHz), suitable for low-power applications. The BA10324AFV-E2, BA2902FV-E2, and BA2902SFV-E2 from Rohm Semiconductor provide enhanced operating temperature ranges and similar electrical performance. The BA3474FVJ-E2 offers higher slew rate (10V/µs) and gain bandwidth product (4 MHz) for faster signal processing. The LM224DTBR2G from onsemi provides a lower operating temperature minimum (-25°C) with compatible electrical specifications.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Slew Rate (V/µs) | Gain Bandwidth Product (MHz) | Input Bias Current (nA) | Input Offset Voltage (mV) | Supply Current (mA) | Output Current / Channel (mA) | Supply Voltage Min (V) | Supply Voltage Max (V) | Operating Temperature (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LM324KAPWRG4 | Texas Instruments | Obsolete | 0.5 | 1.2 | 15 | 2 | 1.4 | 30 | 3 | 30 | 0 to 70 | 14-TSSOP |
| LM324KAPWR | Texas Instruments | Active | 0.5 | 1.2 | 15 | 2 | 1.4 | 30 | 3 | 30 | 0 to 70 | 14-TSSOP |
| LM324MT/NOPB | Texas Instruments | Active | — | 1 | 45 | 2 | 1.5 | 40 | 3 | 32 | 0 to 70 | 14-TSSOP |
| LM324MTX/NOPB | Texas Instruments | Active | — | 1 | 45 | 2 | 1.5 | 40 | 3 | 32 | 0 to 70 | 14-TSSOP |
| LP324MT/NOPB | Texas Instruments | Active | 0.05 | 0.1 | 2 | 2 | 0.085 | 10 | 3 | 32 | 0 to 70 | 14-TSSOP |
| LP324MTX/NOPB | Texas Instruments | Active | 0.05 | 0.1 | 2 | 2 | 0.085 | 10 | 3 | 32 | 0 to 70 | 14-TSSOP |
| BA10324AFV-E2 | Rohm Semiconductor | Active | 0.2 | 0.5 | 20 | 2 | 0.6 | 35 | 3 | 32 | -40 to 85 | 14-LSSOP |
| BA2902FV-E2 | Rohm Semiconductor | Active | 0.2 | 0.5 | 20 | 2 | 0.7 | 30 | 3 | 32 | -40 to 125 | 14-LSSOP |
| BA2902SFV-E2 | Rohm Semiconductor | Active | 0.2 | 0.5 | 20 | 2 | 0.7 | 30 | 3 | 32 | -40 to 105 | 14-LSSOP |
| BA3474FVJ-E2 | Rohm Semiconductor | Active | 10 | 4 | 100 | 1.5 | 8 | 30 | 3 | 36 | -40 to 85 | 14-TSSOP |
| LM224DTBR2G | onsemi | Active | — | 1 | 90 | 2 | — | 40 | 3 | 32 | -25 to 85 | 14-TSSOP |
Engineering Selection Recommendations
Primary Recommendation: LM324KAPWR
The LM324KAPWR from Texas Instruments is the direct active equivalent of the LM324KAPWRG4. It maintains identical electrical specifications (0.5V/µs slew rate, 1.2 MHz gain bandwidth product, 15 nA input bias current, 30 mA output current per channel) and operates across the same supply voltage range (3V to 30V). The part is in active production status with 10,200 units in stock, ensuring long-term availability. Packaging differs only in format (Cut Tape & Digi-Reel® versus Tape & Reel), which does not affect electrical or mechanical compatibility. RoHS3 compliance and MSL Level 1 rating match the original specification.
Secondary Recommendation: LM324MT/NOPB or LM324MTX/NOPB
Both LM324MT/NOPB and LM324MTX/NOPB are active Texas Instruments products with compatible electrical performance. These parts feature a slightly higher supply voltage maximum (32V versus 30V) and marginally higher input bias current (45 nA versus 15 nA) and supply current (1.5mA versus 1.4mA). The gain bandwidth product is reduced to 1 MHz, and output current per channel increases to 40 mA. These specifications remain within acceptable tolerance for general-purpose amplifier applications. Both parts are LinCMOS™ series devices with active production status and substantial inventory availability (2,316 and 21,068 units respectively).
Alternative for Low-Power Applications: LP324MT/NOPB or LP324MTX/NOPB
The LP324MT/NOPB and LP324MTX/NOPB are suitable substitutes when power consumption is a critical design constraint. These parts reduce supply current to 85µA (approximately 16 times lower than the original) and output current per channel to 10 mA. The trade-off is significantly reduced gain bandwidth product (100 kHz) and slew rate (0.05V/µs). These parts are appropriate only for applications where bandwidth and slew rate requirements are compatible with 100 kHz operation.
Alternative for Extended Temperature Range: BA2902FV-E2 or BA2902SFV-E2
The BA2902FV-E2 and BA2902SFV-E2 from Rohm Semiconductor extend the operating temperature range to -40°C to 125°C and -40°C to 105°C respectively, compared to the original 0°C to 70°C. These parts feature reduced slew rate (0.2V/µs) and gain bandwidth product (500 kHz) but maintain compatible supply voltage ranges and input offset voltage. Package designation is 14-LSSOP rather than 14-TSSOP, though both are 0.173" width, 4.40mm packages suitable for surface mount applications.
Alternative for High-Speed Applications: BA3474FVJ-E2
The BA3474FVJ-E2 from Rohm Semiconductor is appropriate when higher slew rate (10V/µs) and gain bandwidth product (4 MHz) are required. This part maintains the 14-TSSOP package and 4-circuit general-purpose amplifier configuration. Operating temperature range extends to -40°C to 85°C, and supply voltage maximum increases to 36V. Supply current increases to 8mA, and input bias current rises to 100 nA. This part is suitable for applications requiring faster signal processing than the original specification permits.
Alternative for Extended Low-Temperature Operation: LM224DTBR2G
The LM224DTBR2G from onsemi extends the minimum operating temperature to -25°C while maintaining the 14-TSSOP package and 4-circuit configuration. Electrical specifications are compatible with the original part, featuring 1 MHz gain bandwidth product, 90 nA input bias current, and 40 mA output current per channel. This part is in active production with 37,400 units in stock.
All recommended substitutes maintain RoHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements.
Frequently Asked Questions (FAQ)
Q: Can the LM324KAPWR be used as a direct replacement for the LM324KAPWRG4?
A: Yes. The LM324KAPWR is electrically and mechanically identical to the LM324KAPWRG4. Both parts feature 0.5V/µs slew rate, 1.2 MHz gain bandwidth product, 15 nA input bias current, and 30 mA output current per channel. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel), which does not affect circuit performance. The LM324KAPWR is in active production status, making it the recommended replacement for the obsolete LM324KAPWRG4.
Q: What is the difference between the 14-TSSOP and 14-LSSOP packages?
A: Both 14-TSSOP and 14-LSSOP packages are surface mount configurations with identical 0.173" width and 4.40mm overall width. The primary difference is in the lead design and pitch specifications. Parts specified for 14-TSSOP (such as LM324KAPWRG4 and BA3474FVJ-E2) and parts specified for 14-LSSOP (such as BA10324AFV-E2, BA2902FV-E2, and BA2902SFV-E2) are mechanically compatible for PCB assembly purposes, though design files should specify the exact package variant required.
Q: Can I use the LP324MT/NOPB in place of the LM324KAPWRG4?
A: The LP324MT/NOPB is mechanically compatible and operates across the same supply voltage range (3V to 32V). However, electrical performance differs significantly. The LP324MT/NOPB features 100 kHz gain bandwidth product and 0.05V/µs slew rate, compared to 1.2 MHz and 0.5V/µs for the original part. Substitution is appropriate only if the application does not require bandwidth or slew rate performance exceeding 100 kHz and 0.05V/µs respectively. The primary advantage is reduced power consumption (85µA versus 1.4mA supply current).
Q: What are the key electrical parameters that determine substitution compatibility?
A: The critical parameters for substitution are: (1) amplifier type (general purpose), (2) number of circuits (4), (3) package type (14-TSSOP or compatible 14-LSSOP), (4) supply voltage range (minimum 3V, maximum 30V or higher), (5) slew rate (0.5V/µs or higher for standard applications), (6) gain bandwidth product (1.2 MHz or higher for standard applications), (7) input bias current (15 nA or lower for precision applications), and (8) output current per channel (30 mA or higher). Deviations from these parameters require application-specific evaluation.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts listed in this reference document are RoHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original LM324KAPWRG4 specification. This ensures compatibility with standard manufacturing processes and storage requirements.
Q: What is the inventory status of substitute parts?
A: The LM324KAPWR has 10,200 units in stock. The LM324MTX/NOPB has 21,068 units in stock. The BA10324AFV-E2 has 27,661 units in stock. The LM224DTBR2G has 37,400 units in stock. The BA2902FV-E2 has 10,300 units in stock. The BA2902SFV-E2 has 9,400 units in stock. The LP324MTX/NOPB has 2,264 units in stock. The LM324MT/NOPB has 2,316 units in stock. The LP324MT/NOPB has 1,467 units in stock. The BA3474FVJ-E2 has 958 units in stock. All parts are available as new original inventory.
Q: Can I mix different substitute parts in the same design?
A: Yes, provided that all parts meet the electrical requirements of the specific circuit application. However, using identical part numbers throughout a design simplifies procurement, inventory management, and troubleshooting. If multiple substitute parts are used, ensure that differences in slew rate, gain bandwidth product, input bias current, and operating temperature range do not create functional inconsistencies in the circuit.
Q: What is the operating temperature range for each substitute part?
A: The LM324KAPWR, LM324MT/NOPB, LM324MTX/NOPB, LP324MT/NOPB, and LP324MTX/NOPB operate from 0°C to 70°C. The BA10324AFV-E2 and BA3474FVJ-E2 operate from -40°C to 85°C. The BA2902FV-E2 operates from -40°C to 125°C. The BA2902SFV-E2 operates from -40°C to 105°C. The LM224DTBR2G operates from -25°C to 85°C. Select the part with the operating temperature range appropriate for the intended application environment.
Q: Is the BA3474FVJ-E2 a suitable substitute for high-frequency applications?
A: The BA3474FVJ-E2 offers significantly higher performance than the original LM324KAPWRG4, with 10V/µs slew rate and 4 MHz gain bandwidth product compared to 0.5V/µs and 1.2 MHz respectively. This part is suitable for applications requiring faster signal processing. However, supply current increases to 8mA, and input bias current rises to 100 nA. Evaluate whether these trade-offs are acceptable for the specific application before substitution.
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