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LM258AMX Equivalent & Substitute Parts
Part Overview
The LM258AMX is a general-purpose operational amplifier featuring two circuits in an 8-SOIC surface mount package. Manufactured by onsemi, this device operates across a supply voltage range of 3V to 32V with an operating temperature range of -25°C to 85°C. The LM258AMX is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching package type, circuit count, amplifier classification, and electrical operating parameters.
Substiute Parts
Key Parameters
| Parameter | LM258AMX Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Current - Input Bias | 40 | nA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply | 800 | µA |
| Current - Output / Channel | 30 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 32 | V |
| Operating Temperature | -25°C ~ 85°C | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LM258AMX is determined by strict adherence to the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Package type: 8-SOIC surface mount only
- Circuit count: 2 circuits minimum
- Amplifier classification: General Purpose
- Supply voltage range: Minimum 3V, maximum 32V or greater
- Input bias current: 45 nA or lower
- Voltage input offset: 2 mV or lower
- Output current per channel: 30 mA or greater
- Mounting type: Surface mount
Substitution Logic: Direct substitutes maintain identical base product numbers (LM258 series) with active product status. Similar substitutes share the 8-SOIC package, dual-circuit configuration, and general-purpose amplifier classification while originating from different base product families (LM2904, LM358, MC34072, NCV2904). All substitute parts must comply with ROHS3 and maintain MSL 1 rating. Operating temperature range variations are acceptable provided the substitute covers the minimum required range of the application.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Input Bias (nA) | Input Offset (mV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) |
|---|---|---|---|---|---|---|---|---|---|
| LM258AMX | onsemi | Obsolete | 40 | 1 | 800 | 30 | 3 | 32 | -25 ~ 85 |
| LM258DR2G | onsemi | Active | 45 | 2 | 800 | 40 | 3 | 32 | -25 ~ 85 |
| LM2904DR2G | onsemi | Active | 45 | 2 | 800 | 40 | 3 | 26 | -40 ~ 85 |
| LM2904VDR2G | onsemi | Active | 45 | 7 | 1500 | 40 | 3 | 32 | -40 ~ 125 |
| LM358ADR2G | onsemi | Active | 45 | 2 | 800 | 40 | 3 | 32 | 0 ~ 70 |
| LM358DR2G | onsemi | Active | 45 | 2 | 800 | 40 | 3 | 32 | 0 ~ 70 |
| MC34072ADR2G | onsemi | Active | 100 | 0.5 | 1900 | 30 | 3 | 44 | 0 ~ 70 |
| MC34072DR2G | onsemi | Active | 100 | 1 | 1900 | 30 | 3 | 44 | 0 ~ 70 |
| MC34072VDR2G | onsemi | Active | 100 | 1 | 1900 | 30 | 3 | 44 | -40 ~ 125 |
| NCV2904DR2G | onsemi | Active | 45 | 7 | 1500 | 40 | 3 | 32 | -40 ~ 125 |
| LM258ADR | Texas Instruments | Active | 15 | 2 | 500 | 40 | 3 | 32 | -25 ~ 85 |
Engineering Selection Recommendations
Direct Substitutes (Recommended Primary Selection):
LM258DR2G (onsemi) is the direct active equivalent to the LM258AMX. This part maintains the LM258 base product number, identical package configuration, and matching supply voltage range (3V to 32V). The LM258DR2G is in active production status with substantial inventory availability (505,200 units), ensuring long-term supply continuity. Electrical parameters remain within acceptable tolerance: input bias current increases from 40 nA to 45 nA, and input offset voltage increases from 1 mV to 2 mV. Output current capability improves from 30 mA to 40 mA per channel. Operating temperature range remains -25°C to 85°C. This part is ROHS3 compliant with MSL 1 rating.
LM258ADR (Texas Instruments) provides an alternative direct LM258 substitute with active product status. This device offers superior input bias current performance (15 nA) and lower supply current consumption (500 µA versus 800 µA). The operating temperature range matches the LM258AMX (-25°C to 85°C). Texas Instruments maintains 27,600 units in inventory. This part is suitable for applications requiring lower power consumption and tighter input bias specifications.
Similar Substitutes (Extended Compatibility):
LM2904DR2G and LM2904VDR2G (onsemi) provide functional substitution through the LM2904 base product family. Both maintain the 8-SOIC package, dual-circuit configuration, and 3V minimum supply voltage. LM2904DR2G operates to 26V maximum supply (versus 32V), while LM2904VDR2G extends to 32V and supports operating temperatures from -40°C to 125°C. The LM2904VDR2G is suitable for extended temperature applications.
LM358ADR2G and LM358DR2G (onsemi) represent the LM358 product family with identical electrical characteristics to LM258DR2G. These parts operate within a narrower temperature range (0°C to 70°C), limiting suitability to commercial-grade applications. LM358DR2G offers the highest inventory availability (492,200 units).
MC34072 series (MC34072ADR2G, MC34072DR2G, MC34072VDR2G) provides enhanced performance characteristics including higher gain-bandwidth product (4.5 MHz versus 1 MHz), faster slew rate (13 V/µs), and extended supply voltage range (up to 44V). These parts feature single-ended output configuration and are suitable for applications requiring improved frequency response. MC34072VDR2G supports extended temperature range (-40°C to 125°C).
NCV2904DR2G (onsemi) offers automotive-grade qualification with extended temperature range (-40°C to 125°C) and highest inventory availability (655,300 units). This part is suitable for automotive and industrial applications requiring temperature robustness.
Selection Criteria by Application:
For direct replacement in existing designs: Select LM258DR2G or LM258ADR.
For extended temperature applications: Select LM2904VDR2G, MC34072VDR2G, or NCV2904DR2G.
For lower power consumption: Select LM258ADR.
For enhanced frequency response: Select MC34072 series.
For automotive applications: Select NCV2904DR2G.
Frequently Asked Questions (FAQ)
Q: Can LM258DR2G directly replace LM258AMX without circuit modification?
A: Yes. LM258DR2G maintains identical package type (8-SOIC), circuit count (2), supply voltage range (3V to 32V), and operating temperature range (-25°C to 85°C). Electrical parameter variations (input bias current 40 nA to 45 nA, input offset voltage 1 mV to 2 mV, output current 30 mA to 40 mA) are within typical application tolerances. No circuit redesign is required.
Q: What is the primary difference between LM258 and LM2904 series?
A: Both are general-purpose dual operational amplifiers in 8-SOIC packages with identical supply voltage minimums (3V). The LM2904 series typically features higher supply current consumption (1.5 mA versus 800 µA for LM258) and extended temperature range options. LM2904 is suitable for applications requiring broader temperature coverage or where the additional supply current is acceptable.
Q: Why does LM2904DR2G have a maximum supply voltage of 26V instead of 32V?
A: LM2904DR2G is specified with a 26V maximum supply voltage, which is lower than the LM258AMX specification of 32V. This part is not suitable for applications requiring the full 32V supply range. Use LM2904VDR2G (32V maximum) or LM258DR2G for 32V applications.
Q: Is the MC34072 series compatible with LM258AMX applications?
A: MC34072 series parts are compatible from a package and circuit count perspective (8-SOIC, dual circuit). However, these devices feature significantly different electrical characteristics: higher input bias current (100 nA), higher supply current (1.9 mA), and enhanced frequency response (4.5 MHz gain-bandwidth product). MC34072 is suitable for applications requiring improved performance but may require circuit optimization for optimal results.
Q: What is the significance of the "V" designation in part numbers like LM2904VDR2G?
A: The "V" designation indicates extended operating temperature range. LM2904VDR2G operates from -40°C to 125°C, compared to standard versions operating from -25°C to 85°C or 0°C to 70°C. Select "V" variants for applications requiring operation across wider temperature extremes.
Q: Can LM358ADR2G or LM358DR2G replace LM258AMX in all applications?
A: LM358 series parts are electrically compatible with LM258 but operate within a narrower temperature range (0°C to 70°C versus -25°C to 85°C). These parts are suitable only for commercial-grade applications that do not require operation below 0°C or above 70°C. Verify application temperature requirements before selection.
Q: What does ROHS3 compliance indicate?
A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All substitute parts listed are ROHS3 compliant, ensuring environmental and regulatory compatibility.
Q: Why is NCV2904DR2G suitable for automotive applications?
A: NCV2904DR2G carries automotive-grade qualification with extended operating temperature range (-40°C to 125°C) and is designed to meet automotive reliability and performance standards. This part is suitable for under-hood and other high-temperature automotive environments.
Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?
A: Cut Tape packaging provides individual components cut from the reel, suitable for small-quantity orders and prototyping. Tape & Reel packaging maintains components on continuous tape for automated assembly equipment, suitable for high-volume production. Both packaging types contain identical components; selection depends on manufacturing process requirements.
Q: Are all substitute parts available in the same packaging options as LM258AMX?
A: LM258AMX is specified in Cut Tape (CT) packaging. Most substitute parts are available in both Cut Tape (CT) and Digi-Reel® or Tape & Reel (TR) options. Verify specific packaging availability with your supplier for your production requirements.
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