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LM324PW Equivalent & Substitute Parts
Part Overview
The LM324PW is a general-purpose operational amplifier manufactured by Texas Instruments, packaged in 14-TSSOP surface mount configuration. This device integrates four independent amplifier circuits suitable for a wide range of analog signal processing applications. The LM324PW is currently designated as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications utilizing this component.
Substiute Parts
Key Parameters
| Parameter | 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 | 20 | nA |
| Voltage - Input Offset | 3 | 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 LM324PW are classified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:
Critical Compatibility Parameters:
- Number of circuits: 4 independent amplifier channels
- Package type: 14-TSSOP surface mount configuration with 0.173" width and 4.40mm width specification
- Supply voltage range: Minimum 3V to maximum 30V or higher
- Operating temperature range: 0°C to 70°C or extended ranges
- RoHS3 compliance and MSL Level 1 rating
Performance Parameter Ranges:
- Gain Bandwidth Product: 1.0 MHz to 4.0 MHz
- Slew Rate: 0.05 V/µs to 10 V/µs
- Input Bias Current: 2 nA to 100 nA
- Output Current per Channel: 10 mA to 40 mA
Substitutes are grouped into three categories based on performance characteristics: standard performance (1 MHz GBW), low-power variants (100 kHz GBW), and high-speed variants (4 MHz GBW). All substitutes maintain the 14-TSSOP package footprint and surface mount mounting type, ensuring mechanical compatibility with existing PCB designs.
Parameter Comparison
| Part Number | Manufacturer | GBW (MHz) | Slew Rate (V/µs) | Input Bias (nA) | Supply Current (mA) | Output Current (mA) | Temp Range (°C) | Status |
|---|---|---|---|---|---|---|---|---|
| LM324PW | Texas Instruments | 1.2 | 0.5 | 20 | 1.4 | 30 | 0 to 70 | Last Time Buy |
| LM324PWR | Rohm Semiconductor | 1.2 | 0.3 | 20 | 1.0 | 30 | -40 to 85 | Obsolete |
| LM324MT/NOPB | Texas Instruments | 1.0 | — | 45 | 1.5 | 40 | 0 to 70 | Active |
| LM324MTX/NOPB | Texas Instruments | 1.0 | — | 45 | 1.5 | 40 | 0 to 70 | Active |
| LP324MT/NOPB | Texas Instruments | 0.1 | 0.05 | 2 | 0.085 | 10 | 0 to 70 | Active |
| LP324MTX/NOPB | Texas Instruments | 0.1 | 0.05 | 2 | 0.085 | 10 | 0 to 70 | Active |
| BA2902FV-E2 | Rohm Semiconductor | 0.5 | 0.2 | 20 | 0.7 | 30 | -40 to 125 | Active |
| BA2902SFV-E2 | Rohm Semiconductor | 0.5 | 0.2 | 20 | 0.7 | 30 | -40 to 105 | Active |
| BA3474FVJ-E2 | Rohm Semiconductor | 4.0 | 10 | 100 | 8.0 | 30 | -40 to 85 | Active |
| LM224DTBR2G | onsemi | 1.0 | — | 90 | — | 40 | -25 to 85 | Active |
| LM2902DTBR2G | onsemi | 1.0 | — | 90 | — | 40 | -40 to 105 | Active |
Engineering Selection Recommendations
Primary Substitutes (Recommended for Direct Replacement):
LM324MT/NOPB and LM324MTX/NOPB from Texas Instruments are the preferred substitutes. Both devices maintain the same manufacturer lineage as the LM324PW, share identical 14-TSSOP packaging, and are designated as Active products with confirmed long-term availability. These parts operate within the same 0°C to 70°C temperature range and provide compatible electrical performance with 1.0 MHz gain bandwidth product. The primary difference is increased input bias current (45 nA versus 20 nA) and slightly higher output current capability (40 mA versus 30 mA), which are generally acceptable in most general-purpose amplifier applications. Both are ROHS3 compliant with MSL Level 1 rating.
Secondary Substitutes (Performance-Dependent Selection):
LM2902DTBR2G from onsemi provides extended operating temperature range (-40°C to 105°C) while maintaining 1.0 MHz gain bandwidth product and 14-TSSOP packaging. This substitute is suitable for applications requiring wider temperature operation. LM224DTBR2G offers similar electrical characteristics with narrower temperature range (-25°C to 85°C).
BA2902FV-E2 and BA2902SFV-E2 from Rohm Semiconductor are active alternatives with reduced supply current (0.7 mA versus 1.4 mA), making them suitable for power-constrained applications. These devices operate at 0.5 MHz gain bandwidth product with extended temperature ranges (-40°C to 125°C and -40°C to 105°C respectively). Package designation is 14-LSSOP rather than 14-TSSOP, requiring PCB layout verification for mechanical compatibility.
Specialized Substitutes (Application-Specific):
LP324MT/NOPB and LP324MTX/NOPB are low-power variants with 100 kHz gain bandwidth product, 2 nA input bias current, and 85 µA supply current. These are suitable only for applications where bandwidth requirements are significantly lower than the original design specification.
BA3474FVJ-E2 is a high-speed variant with 4.0 MHz gain bandwidth product and 10 V/µs slew rate. This substitute is appropriate only for applications requiring enhanced frequency response and faster signal processing, as it increases supply current to 8.0 mA.
Compliance and Availability:
All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing processes and storage requirements. Inventory availability is confirmed for all active-status parts listed.
Frequently Asked Questions (FAQ)
Q: Can LM324MT/NOPB directly replace LM324PW without PCB modifications?
A: Yes. Both devices use identical 14-TSSOP packaging with 0.173" width and 4.40mm width specification. Pin configuration and footprint are compatible. No PCB layout changes are required. Electrical performance differences (1.0 MHz versus 1.2 MHz gain bandwidth product, 45 nA versus 20 nA input bias current) are within acceptable tolerances for general-purpose amplifier applications.
Q: What is the difference between LM324MT/NOPB and LM324MTX/NOPB?
A: Both devices are electrically identical with identical performance specifications. The primary difference is packaging format: LM324MT/NOPB is supplied in Tube packaging, while LM324MTX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly process requirements and quantity needs.
Q: Are BA2902FV-E2 and BA2902SFV-E2 mechanically compatible with LM324PW?
A: Both Rohm devices use 14-LSSOP packaging, which differs from the 14-TSSOP specification of LM324PW. While both are 14-pin surface mount packages with similar 4.40mm width, the LSSOP variant has different lead pitch and body dimensions. PCB footprint verification is required before substitution. Electrical compatibility is confirmed for general-purpose amplifier applications.
Q: Why does LM324PWR show Obsolete status despite being a substitute?
A: LM324PWR from Rohm Semiconductor is listed as Obsolete, indicating discontinued production. While it provides compatible electrical performance and packaging, it is not recommended for new designs due to limited availability. Active alternatives such as LM324MT/NOPB should be prioritized.
Q: Can LP324MT/NOPB replace LM324PW in existing designs?
A: LP324MT/NOPB is a low-power variant with 100 kHz gain bandwidth product, significantly lower than LM324PW's 1.2 MHz specification. Substitution is only appropriate if the application's bandwidth requirements are confirmed to be below 100 kHz. For standard general-purpose amplifier applications requiring 1+ MHz bandwidth, this substitute is not suitable.
Q: What is the temperature range consideration when selecting a substitute?
A: LM324PW operates from 0°C to 70°C. Substitutes with extended temperature ranges (such as LM2902DTBR2G at -40°C to 105°C) are suitable for applications requiring wider operating temperature specifications. Substitutes with narrower ranges (such as LM224DTBR2G at -25°C to 85°C) are acceptable only if the application's temperature requirements fall within the specified range.
Q: Are all substitutes RoHS3 compliant?
A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing standards and storage requirements.
Q: Which substitute offers the lowest power consumption?
A: LP324MT/NOPB and LP324MTX/NOPB provide the lowest supply current at 85 µA total (versus 1.4 mA for LM324PW). However, these low-power variants operate at 100 kHz gain bandwidth product and are suitable only for applications with reduced bandwidth requirements.
Q: Can BA3474FVJ-E2 be used as a direct replacement?
A: BA3474FVJ-E2 is mechanically compatible (14-TSSOP packaging) but electrically different. It provides 4.0 MHz gain bandwidth product and 10 V/µs slew rate, compared to LM324PW's 1.2 MHz and 0.5 V/µs. This substitute is appropriate only for applications requiring enhanced frequency response and faster signal processing. Supply current increases to 8.0 mA, which may impact power budget.
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