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LM2904M Equivalent & Substitute Parts
Part Overview
The LM2904M is a general-purpose operational amplifier featuring two circuits in an 8-SOIC surface mount package, manufactured by onsemi. This device is classified as obsolete, indicating it has been discontinued and is no longer in active production. The LM2904M operates across a supply voltage range of 3 V to 26 V with a gain bandwidth product of 1 MHz, making it suitable for general-purpose amplification applications requiring dual-channel configurations.
Due to its obsolete status, alternative equivalent and substitute parts are necessary for new designs, production continuity, and long-term component availability. Substitute parts maintain functional compatibility through matching electrical specifications and identical or compatible packaging formats.
Substiute Parts
Key Parameters
| Parameter | LM2904M Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Gain Bandwidth Product | 1 | MHz |
| Current - Input Bias | 45 | nA |
| Voltage - Input Offset | 2 | mV |
| Current - Supply | 800µA (x2 Channels) | — |
| Current - Output / Channel | 40 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 26 | V |
| Operating Temperature | -40°C ~ 85°C | — |
| Mounting Type | Surface Mount | — |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LM2904M is determined by strict alignment of the following critical parameters:
Primary Substitution Criteria:
- Number of circuits: 2 (dual-channel configuration)
- Package type: 8-SOIC surface mount format
- Amplifier classification: General Purpose
- Gain bandwidth product: 1 MHz
- Supply voltage range compatibility: Minimum 3 V, maximum ≥ 26 V
- Current output per channel: 40 mA
- Mounting type: Surface Mount
Secondary Compatibility Parameters:
- Input bias current: 45 nA (tolerance range acceptable)
- Input offset voltage: 2 mV (tolerance range acceptable)
- Supply current: 800µA per channel (tolerance range acceptable)
- Operating temperature range: Must encompass or exceed -40°C to 85°C
Substitute parts are grouped into three categories based on product status and electrical performance alignment:
Category 1 - Direct Equivalents (Active Status): Parts maintaining identical electrical specifications and 8-SOIC packaging with active product status.
Category 2 - Functional Equivalents (Active Status): Parts with matching core electrical parameters but minor variations in secondary specifications, maintaining full functional compatibility.
Category 3 - Upgraded Alternatives (Active/Limited Status): Parts with enhanced specifications or alternative manufacturer sourcing, suitable for new designs requiring improved performance or extended availability.
Parameter Comparison
| Part Number | Manufacturer | Product Status | GBW (MHz) | Input Bias (nA) | Input Offset (mV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|
| LM2904M | onsemi | Obsolete | 1 | 45 | 2 | 800 | 40 | 3 | 26 | -40 ~ 85 | 8-SOIC |
| LM2904DR2G | onsemi | Active | 1 | 45 | 2 | 800 | 40 | 3 | 26 | -40 ~ 85 | 8-SOIC |
| LM2904VDR2G | onsemi | Active | 1 | 45 | 7 | 1500 | 40 | 3 | 32 | -40 ~ 125 | 8-SOIC |
| LM258DR2G | onsemi | Active | 1 | 45 | 2 | 800 | 40 | 3 | 32 | -25 ~ 85 | 8-SOIC |
| LM358DR2G | onsemi | Active | 1 | 45 | 2 | 800 | 40 | 3 | 32 | 0 ~ 70 | 8-SOIC |
| NCV2904DR2G | onsemi | Active | 1 | 45 | 7 | 1500 | 40 | 3 | 32 | -40 ~ 125 | 8-SOIC |
| LM2904QDR | Texas Instruments | Active | 0.7 | 20 | 3 | 500 | 40 | 3 | 26 | -40 ~ 125 | 8-SOIC |
| LM2904QDRG4 | Texas Instruments | Last Time Buy | 0.7 | 20 | 3 | 500 | 40 | 3 | 26 | -40 ~ 125 | 8-SOIC |
| LM2904AVQDR | Texas Instruments | Active | 0.7 | 20 | 1 | 500 | 40 | 3 | 30 | -40 ~ 125 | 8-SOIC |
| LM2904AVQDRG4 | Texas Instruments | Discontinued at DiGi Electronics | 0.7 | 20 | 1 | 500 | 40 | 3 | 30 | -40 ~ 125 | 8-SOIC |
| BA2904F-E2 | Rohm Semiconductor | Active | 0.5 | 20 | 2 | 500 | 30 | 3 | 32 | -40 ~ 125 | 8-SOP |
Engineering Selection Recommendations
Primary Recommendation - Direct Equivalent:
The LM2904DR2G (onsemi) is the direct equivalent replacement for the LM2904M. This part maintains identical electrical specifications including 1 MHz gain bandwidth product, 45 nA input bias current, 2 mV input offset voltage, and 800µA supply current per channel. The LM2904DR2G is packaged in 8-SOIC format with identical pinout and footprint compatibility. Product status is Active with RoHS3 compliance and REACH unaffected designation. This part is suitable for direct substitution in existing designs without circuit modification.
Secondary Recommendation - Extended Temperature Range:
The LM2904VDR2G (onsemi) provides extended operating temperature range (-40°C to 125°C) compared to the LM2904M (-40°C to 85°C). This part maintains 1 MHz gain bandwidth product and 40 mA output current per channel. Supply voltage maximum is extended to 32 V. Input offset voltage is specified at 7 mV and supply current is 1.5 mA per channel. This part is suitable for applications requiring operation beyond 85°C. Product status is Active with RoHS3 compliance.
Alternative Recommendation - Enhanced Performance:
The LM2904AVQDR (Texas Instruments) offers enhanced specifications including reduced input offset voltage (1 mV), lower input bias current (20 nA), and reduced supply current (500µA per channel). Operating temperature range extends to -40°C to 125°C. Supply voltage maximum is 30 V. Gain bandwidth product is 700 kHz. This part is suitable for new designs prioritizing lower power consumption and improved precision. Product status is Active with RoHS3 compliance.
Compliance Considerations:
All recommended substitute parts maintain RoHS3 compliance and REACH unaffected status, matching the regulatory profile of the LM2904M. Moisture sensitivity level remains at MSL 1 (Unlimited) across all substitutes. All parts are classified under HTSUS 8542.33.0001 and ECCN EAR99.
Frequently Asked Questions (FAQ)
Q: Can the LM2904DR2G be used as a direct replacement for the LM2904M without circuit modification?
A: Yes. The LM2904DR2G is electrically and mechanically identical to the LM2904M. Both parts feature 1 MHz gain bandwidth product, 45 nA input bias current, 2 mV input offset voltage, 800µA supply current per channel, and 8-SOIC packaging. Pinout and footprint are identical, enabling direct substitution.
Q: What is the primary difference between LM2904VDR2G and LM2904DR2G?
A: The LM2904VDR2G extends the operating temperature range to -40°C to 125°C (compared to -40°C to 85°C for LM2904DR2G) and increases maximum supply voltage to 32 V (compared to 26 V). Supply current increases to 1.5 mA per channel, and input offset voltage is specified at 7 mV. These differences make LM2904VDR2G suitable for high-temperature applications.
Q: Why does the LM2904AVQDR have lower supply current than the LM2904M?
A: The LM2904AVQDR is manufactured by Texas Instruments using different process technology, resulting in 500µA supply current per channel compared to 800µA for the LM2904M. This represents improved power efficiency while maintaining 40 mA output current per channel and 8-SOIC packaging compatibility.
Q: Is the BA2904F-E2 compatible with the LM2904M?
A: The BA2904F-E2 (Rohm Semiconductor) is functionally compatible but has package differences. While both are 8-pin surface mount devices, the BA2904F-E2 uses 8-SOP packaging (0.173" width) compared to 8-SOIC (0.154" width) for the LM2904M. Output current per channel is 30 mA versus 40 mA. Pinout compatibility must be verified before substitution.
Q: What is the significance of "Last Time Buy" status for LM2904QDRG4?
A: Last Time Buy status indicates that Texas Instruments has announced end-of-life for this part. Existing inventory is available, but no future production is planned. For new designs, the LM2904QDR (Active status) or LM2904AVQDR (Active status) are recommended alternatives from Texas Instruments.
Q: Can I use LM258DR2G in place of LM2904M?
A: The LM258DR2G is functionally compatible with matching 1 MHz gain bandwidth product, 45 nA input bias current, 2 mV input offset voltage, and 8-SOIC packaging. However, the operating temperature range is -25°C to 85°C, which does not extend to -40°C. Use LM258DR2G only in applications where minimum operating temperature is -25°C or higher.
Q: What are the key parameters that determine substitution compatibility?
A: Substitution compatibility is determined by: (1) dual-circuit configuration, (2) 8-SOIC surface mount package, (3) 1 MHz gain bandwidth product, (4) 40 mA output current per channel, (5) supply voltage range encompassing 3 V minimum and 26 V maximum, and (6) operating temperature range compatibility with the application requirements.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All recommended substitute parts carry RoHS3 compliance designation and REACH unaffected status, matching the regulatory profile of the LM2904M. Moisture sensitivity level is MSL 1 (Unlimited) for all parts.
Q: What is the difference between LM2904AVQDR and LM2904AVQDRG4?
A: Both parts are electrically identical with 700 kHz gain bandwidth product, 20 nA input bias current, 1 mV input offset voltage, and 500µA supply current per channel. The primary difference is product status: LM2904AVQDR is Active, while LM2904AVQDRG4 is Discontinued at DiGi Electronics. For new designs, LM2904AVQDR is recommended.
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