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LM324PWR Equivalent & Substitute Parts
Part Overview
The LM324PWR is a general-purpose operational amplifier featuring four independent circuits in a 14-TSSOP surface mount package. Manufactured by Rohm Semiconductor, this device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. The LM324PWR operates across a wide supply voltage range of 3V to 32V with an extended temperature range of -40°C to 85°C, making it suitable for industrial and automotive applications requiring robust performance across temperature extremes.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Slew Rate | 0.3 | V/µs |
| Gain Bandwidth Product | 1.2 | MHz |
| Current - Input Bias | 20 | nA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply | 1 | mA |
| Current - Output / Channel | 30 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 32 | 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 | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LM324PWR is determined by strict adherence to the following electrical and mechanical parameters:
Critical Matching Parameters:
- Package type: 14-TSSOP surface mount configuration
- Number of circuits: 4 independent amplifier stages
- Supply voltage range: Minimum 3V, Maximum 32V (or compatible subset)
- Input bias current: 20 nA nominal
- Output current per channel: 30 mA minimum
- Gain bandwidth product: 1.2 MHz nominal
- Operating temperature range: Must encompass or exceed -40°C to 85°C
- RoHS3 compliance and MSL Level 1 rating
Substitution Categories:
Direct Substitutes maintain electrical specifications within acceptable tolerances and identical packaging. These include LM324KPWR, LM324PWRG3, LM324KPW, and LM324PW from Texas Instruments. All direct substitutes feature the same 14-TSSOP package, four-circuit configuration, and compatible supply voltage specifications.
Similar Substitutes provide functional equivalence with minor parameter variations that remain within acceptable engineering tolerances. These include LM224-series devices (LM224APT, LM224DTBR2G, LM224PT) and LM2902-series devices (LM2902AWYPT, LM2902DTBR2G). Similar substitutes maintain the 14-TSSOP package and four-circuit architecture but may exhibit variations in slew rate, gain bandwidth product, input offset voltage, or output current specifications.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Slew Rate (V/µs) | GBW (MHz) | Input Bias (nA) | Input Offset (mV) | Supply Current (mA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LM324PWR | Rohm Semiconductor | Obsolete | 0.3 | 1.2 | 20 | 1 | 1 | 30 | 3 | 32 | -40 to 85 | 14-TSSOP |
| LM324KPWR | Texas Instruments | Active | 0.5 | 1.2 | 20 | 3 | 1.4 | 30 | 3 | 30 | 0 to 70 | 14-TSSOP |
| LM324PWRG3 | Texas Instruments | Obsolete | 0.5 | 1.2 | 20 | 3 | 1.4 | 30 | 3 | 30 | 0 to 70 | 14-TSSOP |
| LM324KPW | Texas Instruments | Last Time Buy | 0.5 | 1.2 | 20 | 3 | 1.4 | 30 | 3 | 30 | 0 to 70 | 14-TSSOP |
| LM324PW | Texas Instruments | Last Time Buy | 0.5 | 1.2 | 20 | 3 | 1.4 | 30 | 3 | 30 | 0 to 70 | 14-TSSOP |
| LM224APT | STMicroelectronics | Active | 0.4 | 1.3 | 20 | 2 | 1.5 | 40 | 3 | 30 | -40 to 105 | 14-TSSOP |
| LM224DTBR2G | onsemi | Active | — | 1 | 90 | 2 | — | 40 | 3 | 32 | -25 to 85 | 14-TSSOP |
| LM224PT | STMicroelectronics | Active | 0.4 | 1.3 | 20 | 2 | 1.5 | 40 | 3 | 30 | -40 to 105 | 14-TSSOP |
| LM2902AWYPT | STMicroelectronics | Active | 0.4 | 1.3 | 20 | 2 | 1.5 | 40 | 3 | 30 | -40 to 125 | 14-TSSOP |
| LM2902DTBR2G | onsemi | Active | — | 1 | 90 | 2 | — | 40 | 3 | 32 | -40 to 105 | 14-TSSOP |
Engineering Selection Recommendations
For Direct Replacement (Highest Compatibility):
The LM324KPWR from Texas Instruments is the primary direct substitute. This device maintains active product status, ensuring long-term availability and supply chain stability. It shares identical package geometry (14-TSSOP), circuit count (4), and gain bandwidth product (1.2 MHz) with the LM324PWR. The LM324KPWR operates across a 3V to 30V supply range, which encompasses the majority of applications using the original part. The operating temperature range of 0°C to 70°C is narrower than the original -40°C to 85°C specification; applications requiring extended temperature operation must evaluate alternative options.
For Extended Temperature Applications:
The LM224APT and LM224PT from STMicroelectronics provide active product status with extended operating temperature range (-40°C to 105°C), exceeding the original LM324PWR specification. These devices feature improved slew rate (0.4V/µs versus 0.3V/µs) and higher output current capability (40 mA versus 30 mA per channel). The gain bandwidth product is marginally higher at 1.3 MHz. Supply voltage range is limited to 3V to 30V.
For Automotive and High-Temperature Environments:
The LM2902AWYPT from STMicroelectronics is qualified to AEC-Q100 automotive standards with an operating temperature range of -40°C to 125°C. This device features push-pull output configuration and is suitable for automotive-grade applications requiring extended temperature operation and formal qualification documentation.
For Wide Supply Voltage Range:
The LM224DTBR2G and LM2902DTBR2G from onsemi maintain the maximum supply voltage specification of 32V, matching the original LM324PWR. These devices are active products with 14-TSSOP packaging and four-circuit configuration. The LM224DTBR2G operates across -25°C to 85°C, while the LM2902DTBR2G extends to -40°C to 105°C.
All recommended substitutes maintain RoHS3 compliance and MSL Level 1 moisture sensitivity rating, ensuring compatibility with modern manufacturing processes and environmental regulations.
Frequently Asked Questions (FAQ)
Q: Can the LM324KPWR directly replace the LM324PWR in all applications?
A: The LM324KPWR is electrically compatible for most applications. However, the operating temperature range differs: LM324KPWR operates 0°C to 70°C versus LM324PWR's -40°C to 85°C. Applications requiring operation below 0°C or above 70°C require alternative substitutes such as LM224APT or LM2902AWYPT.
Q: What is the significance of the different slew rates among substitute parts?
A: Slew rate determines the maximum rate of voltage change at the output. The LM324PWR specifies 0.3V/µs, while most Texas Instruments direct substitutes provide 0.5V/µs. Higher slew rates enable faster signal transitions and improved performance in high-frequency applications. Applications sensitive to slew rate limitations should verify compatibility with the specific substitute selected.
Q: Are all substitute parts available in the same packaging?
A: All listed substitute parts utilize the 14-TSSOP surface mount package with identical 0.173" (4.40mm) width. Pinout and footprint compatibility are maintained across all substitutes, enabling direct PCB-level replacement without layout modifications.
Q: What is the difference between LM324 and LM224 series devices?
A: The LM224 series represents an enhanced variant of the LM324 architecture. LM224 devices typically offer improved performance characteristics including higher output current capability (40 mA versus 30 mA), extended temperature ranges, and marginally higher gain bandwidth product (1.3 MHz versus 1.2 MHz). Both series maintain four-circuit configuration and 14-TSSOP packaging.
Q: Which substitute is recommended for new designs?
A: For new designs, the LM324KPWR from Texas Instruments is recommended as the primary choice due to active product status and broad availability. For applications requiring extended temperature operation, LM224APT or LM2902AWYPT provide superior specifications and long-term supply assurance. For automotive applications, LM2902AWYPT with AEC-Q100 qualification is the appropriate selection.
Q: How do input offset voltage differences affect circuit performance?
A: Input offset voltage represents the DC voltage differential required at the input to produce zero output voltage. The LM324PWR specifies 1 mV maximum, while most substitutes specify 2-3 mV. Applications with high closed-loop gain or precision DC amplification may require offset nulling circuitry if substituting to higher offset voltage devices. Low-frequency AC applications are generally unaffected by this parameter.
Q: Are there supply voltage limitations when substituting parts?
A: The LM324PWR operates across 3V to 32V. Most Texas Instruments direct substitutes limit maximum supply to 30V. The onsemi LM224DTBR2G and LM2902DTBR2G maintain the 32V maximum. Applications requiring operation at 30V to 32V must select onsemi variants or confirm Texas Instruments parts operate within design margins.
Q: What is the significance of product status (Active, Obsolete, Last Time Buy)?
A: Active status indicates ongoing production and long-term availability. Obsolete status indicates production has ceased; existing inventory may be available but future procurement is uncertain. Last Time Buy status indicates final production run with defined cutoff date. For new designs, Active status products are strongly preferred to ensure supply continuity throughout product lifecycle.
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