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LM2902DR Equivalent & Substitute Parts
Part Overview
The LM2902DR is a general-purpose operational amplifier integrated circuit manufactured by Rohm Semiconductor, featuring four independent amplifier circuits in a 14-SOIC surface mount package. This device is classified as obsolete, indicating it is no longer in active production. The LM2902DR operates across a wide supply voltage range of 3V to 32V and maintains functionality across an extended temperature range of -40°C to 125°C, making it suitable for diverse industrial and commercial applications requiring quad operational amplifier functionality.
Due to its obsolete status, identifying equivalent and substitute parts is necessary for design continuity, production support, and long-term component availability. Substitute parts must maintain functional compatibility while meeting the same electrical specifications and package requirements.
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 125 | °C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the LM2902DR are selected based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:
Critical Matching Parameters:
- Amplifier Type: General Purpose
- Number of Circuits: 4
- Package / Case: 14-SOIC (0.154", 3.90mm Width)
- Mounting Type: Surface Mount
- Supply Voltage Range: Minimum 3V, Maximum 30V or higher
- Operating Temperature Range: Must encompass or exceed -40°C to 125°C
- RoHS3 Compliance: Required
- Moisture Sensitivity Level: 1 (Unlimited)
Acceptable Parameter Variations: Substitute parts may exhibit variations in slew rate, gain bandwidth product, input bias current, input offset voltage, and supply current, provided these variations do not degrade circuit performance in the target application. All substitute parts maintain the same quad operational amplifier architecture and 14-SOIC package footprint, ensuring direct pin-compatible replacement capability.
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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| LM2902DR | Rohm Semiconductor | Obsolete | 0.3 | 1.2 | 20 | 1 | 1 | 30 | 3 | 32 | -40 to 125 |
| LM124DT | STMicroelectronics | Active | 0.4 | 1.3 | 20 | 2 | 1.5 | 40 | 3 | 30 | -55 to 125 |
| LM2902KVQDRG4 | Texas Instruments | Last Time Buy | 0.5 | 1.2 | 20 | 3 | 1.4 | 30 | 3 | 30 | -40 to 125 |
| LM2902M/NOPB | Texas Instruments | Active | — | 1 | 45 | 2 | 1.5 | 40 | 3 | 32 | -40 to 85 |
| LM2902MX/NOPB | Texas Instruments | Active | — | 1 | 45 | 2 | 1.5 | 40 | 3 | 32 | -40 to 85 |
| LM124D | STMicroelectronics | Obsolete | 0.4 | 1.2 | 20 | 2 | 1.5 | 30 | 3 | 30 | -55 to 125 |
| LM124DG4 | Texas Instruments | Last Time Buy | 0.5 | 1.2 | 20 | 3 | 1.4 | 30 | 3 | 30 | -55 to 125 |
| LM124DR | Texas Instruments | Active | 0.5 | 1.2 | 20 | 3 | 1.4 | 30 | 3 | 30 | -55 to 125 |
| LM124DRG4 | Texas Instruments | Discontinued at DiGi Electronics | 0.5 | 1.2 | 20 | 3 | 1.4 | 30 | 3 | 30 | -55 to 125 |
| LM224AD | STMicroelectronics | Obsolete | 0.4 | 1.2 | 20 | 2 | 1.5 | 30 | 3 | 30 | -40 to 105 |
| LM224ADR | Texas Instruments | Active | 0.5 | 1.2 | 15 | 2 | 1.4 | 30 | 3 | 30 | -25 to 85 |
Engineering Selection Recommendations
Primary Recommendation: LM124DR (Texas Instruments)
The LM124DR is the preferred substitute for the LM2902DR. This part maintains active product status with high inventory availability (171,766 pcs), ensuring long-term supply continuity. The LM124DR operates across the extended temperature range of -55°C to 125°C, exceeding the original specification and providing enhanced reliability for demanding applications. The device is RoHS3 compliant with MSL 1 rating, matching the original part's environmental certifications. Pin-compatible 14-SOIC packaging enables direct board-level replacement without layout modifications.
Secondary Recommendation: LM2902KVQDRG4 (Texas Instruments)
The LM2902KVQDRG4 offers direct base product number alignment with the original LM2902DR, maintaining identical electrical architecture. This part carries Last Time Buy status, indicating limited future availability but current stock presence (2,900 pcs). The operating temperature range of -40°C to 125°C matches the original specification exactly. This option is suitable for applications where design continuity and minimal parameter variation are prioritized.
Alternative Recommendation: LM2902M/NOPB (Texas Instruments)
The LM2902M/NOPB is an active product with robust inventory (2,640 pcs) and extended supply voltage range to 32V, matching the original part's maximum specification. This part operates to 85°C maximum, which may limit suitability for applications requiring the full -40°C to 125°C range. The LinCMOS™ series designation indicates advanced process technology with lower input bias current variation.
Consideration for Extended Temperature Applications: LM124DG4 or LM124D
For applications requiring operation across the full -55°C to 125°C range, the LM124DG4 (Last Time Buy, 3,300 pcs) or LM124D (Obsolete, 1,525 pcs) provide enhanced low-temperature performance. Both parts maintain identical electrical specifications to the LM124DR but with different packaging formats. These options are suitable only when extended low-temperature operation is a design requirement.
Not Recommended: LM224ADR
The LM224ADR, while active and widely available (133,500 pcs), operates only to 85°C maximum temperature, falling short of the original -40°C to 125°C specification. This part is suitable only for applications with reduced temperature range requirements.
Frequently Asked Questions (FAQ)
Q: Can the LM124DR directly replace the LM2902DR without circuit modifications?
A: Yes. The LM124DR is pin-compatible with the LM2902DR in the 14-SOIC package. Both devices feature four independent operational amplifier circuits with identical pin assignments. Direct board-level substitution is possible without schematic or layout changes.
Q: What is the primary difference between LM2902 and LM124 base product families?
A: The LM2902 and LM124 are distinct product families with different internal architectures. The LM124 incorporates differential output stages, while the LM2902 uses standard output configurations. Both families maintain compatible electrical performance for general-purpose amplifier applications and are pin-compatible in 14-SOIC packaging.
Q: Why is the LM2902DR classified as obsolete?
A: The LM2902DR has reached end-of-life status at the manufacturer level. Rohm Semiconductor has discontinued active production and support for this part number. Substitute parts from active product lines ensure continued design support and component availability.
Q: Does the LM124DR meet the same environmental compliance standards as the LM2902DR?
A: Yes. The LM124DR is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's certifications. Both parts are REACH unaffected and carry identical ECCN and HTSUS classifications.
Q: What is the significance of "Last Time Buy" status for the LM2902KVQDRG4?
A: Last Time Buy status indicates the manufacturer has announced final production and will no longer accept new orders after a specified date. Existing inventory remains available for purchase, but future availability is not guaranteed. This status is transitional between active production and obsolescence.
Q: Are there performance differences between the LM2902M/NOPB and LM2902MX/NOPB?
A: The LM2902M/NOPB and LM2902MX/NOPB are functionally equivalent. The primary difference is packaging format: LM2902M/NOPB is supplied in Tube packaging, while LM2902MX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Electrical specifications and performance characteristics are identical.
Q: Can the LM224ADR be used in applications requiring -40°C operation?
A: No. The LM224ADR operates only from -25°C to 85°C, which does not meet the -40°C minimum temperature requirement of the original LM2902DR. For applications requiring operation below -25°C, alternative parts such as LM124DR or LM2902KVQDRG4 must be selected.
Q: What inventory considerations should guide part selection?
A: The LM124DR offers the highest inventory availability (171,766 pcs), providing maximum supply security for production programs. The LM2902M/NOPB and LM2902MX/NOPB maintain moderate inventory levels (2,640 and 1,499 pcs respectively). Parts with Last Time Buy or Obsolete status carry limited inventory and should be evaluated for long-term program requirements.
Q: Is the 14-SOIC package footprint identical across all substitute parts?
A: Yes. All substitute parts listed maintain the 14-SOIC (0.154", 3.90mm Width) package specification. PCB footprints and land patterns are identical, enabling direct component substitution without layout redesign.
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