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LM358MX Equivalent & Substitute Parts
Part Overview
The LM358MX is a general-purpose operational amplifier featuring two independent circuits in an 8-SOP surface mount package, manufactured by Rohm Semiconductor. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The LM358MX operates across a supply voltage range of 3V to 32V with an operating temperature range of -40°C to 85°C, making it suitable for industrial and commercial applications requiring dual-channel amplification.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Slew Rate | 0.3 | V/µs |
| Current - Input Bias | 20 | nA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply | 600 | µA |
| 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 | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LM358MX is determined by strict alignment of electrical and mechanical parameters. The critical parameters governing substitutability are:
Electrical Compatibility Criteria:
- Number of circuits (must be 2)
- Amplifier type (general purpose)
- Supply voltage range (minimum 3V, maximum ≥32V)
- Operating temperature range (must encompass -40°C to 85°C or extend beyond)
- Slew rate (0.3V/µs baseline)
- Input bias current (20 nA nominal)
- Output current per channel (≥30 mA)
Mechanical Compatibility Criteria:
- Package type (8-SOIC or 8-SOP)
- Mounting type (surface mount)
- Physical dimensions (0.154" width, 3.90mm)
Compliance Requirements:
- RoHS3 compliance
- MSL rating of 1 (unlimited moisture sensitivity)
Substitute parts are categorized as Upgrade when they provide enhanced specifications (extended temperature range, improved offset voltage, higher output current) while maintaining backward compatibility. Similar parts meet core electrical and mechanical requirements but may have minor parameter variations or different product status classifications.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Slew Rate (V/µs) | Input Bias (nA) | Input Offset (mV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|
| LM358MX | Rohm Semiconductor | Obsolete | 0.3 | 20 | 1 | 600 | 30 | 3 | 32 | -40 to 85 | 8-SOP |
| LM2904VQDR | Rohm Semiconductor | Obsolete | 0.3 | 20 | 3 | 1000 | 40 | 3 | 26 | -40 to 125 | 8-SOIC |
| LM2904VQDRG4 | Texas Instruments | Discontinued at DiGi Electronics | 0.3 | 20 | 3 | 500 | 40 | 3 | 30 | -40 to 125 | 8-SOIC |
| LM2904VQDRG4Q1 | Texas Instruments | Active | 0.3 | 20 | 3 | 500 | 30 | 3 | 26 | -40 to 125 | 8-SOIC |
| LM2904VQDRQ1 | Texas Instruments | Active | 0.3 | 20 | 3 | 500 | 30 | 3 | 26 | -40 to 125 | 8-SOIC |
| LM258ADR | Texas Instruments | Active | 0.3 | 15 | 2 | 500 | 40 | 3 | 32 | -25 to 85 | 8-SOIC |
| LM258DG4 | Texas Instruments | Obsolete | 0.3 | 20 | 3 | 500 | 40 | 3 | 32 | -25 to 85 | 8-SOIC |
| LM258DR | UMW | Active | — | 45 | 2 | 1000 | 40 | — | 32 | -25 to 85 | 8-SOP |
| LM258DR2G | onsemi | Active | — | 45 | 2 | 800 | 40 | 3 | 32 | -25 to 85 | 8-SOIC |
| LM258DRG4 | Texas Instruments | Discontinued at DiGi Electronics | 0.3 | 20 | 3 | 500 | 40 | 3 | 32 | -25 to 85 | 8-SOIC |
| LM2904AVQDR | Texas Instruments | Active | 0.3 | 20 | 1 | 500 | 40 | 3 | 30 | -40 to 125 | 8-SOIC |
Engineering Selection Recommendations
Primary Upgrade Path: The LM2904VQDRG4Q1 (Texas Instruments) and LM2904VQDRQ1 (Texas Instruments) are recommended as primary substitutes. Both devices are active products with AEC-Q100 automotive qualification, providing extended operating temperature range (-40°C to 125°C) compared to the LM358MX. These parts maintain electrical compatibility with identical slew rate (0.3V/µs), input bias current (20 nA), and supply voltage minimum (3V). The maximum supply voltage of 26V is within acceptable tolerance for applications designed for the LM358MX's 32V maximum.
Secondary Upgrade Option: The LM2904AVQDR (Texas Instruments) offers active product status with the lowest input offset voltage (1 mV, matching the LM358MX) and extended temperature range to 125°C. Supply voltage maximum is 30V, providing superior headroom compared to other LM2904 variants.
Alternative with Extended Supply Range: The LM258ADR (Texas Instruments) maintains the full 32V maximum supply voltage and is an active product. However, the operating temperature range is limited to -25°C to 85°C, which does not extend to the LM358MX's -40°C minimum. This part is suitable only for applications not requiring sub-zero operation.
Compatibility Considerations: All recommended substitutes employ 8-SOIC packaging, which is mechanically compatible with the LM358MX's 8-SOP package in surface mount applications. All parts maintain RoHS3 compliance and MSL rating of 1 (unlimited). The LM258DR2G (onsemi) and LM258DR (UMW) are active products with full 32V supply range but feature higher input bias current (45 nA versus 20 nA), making them suitable only for applications with relaxed input impedance requirements.
Frequently Asked Questions (FAQ)
Q: Can the LM2904VQDRG4Q1 directly replace the LM358MX in existing designs?
A: Yes, the LM2904VQDRG4Q1 provides direct functional replacement. Both devices feature identical slew rate (0.3V/µs), input bias current (20 nA), and dual-circuit configuration in 8-pin surface mount packages. The primary design consideration is the reduced maximum supply voltage (26V versus 32V). Applications operating at or below 26V supply voltage experience no functional impact. The extended operating temperature range (-40°C to 125°C) provides additional margin beyond the LM358MX specification.
Q: What is the difference between LM2904VQDRG4Q1 and LM2904VQDRQ1?
A: Both parts are functionally identical with active product status and AEC-Q100 automotive qualification. The primary distinction is packaging format: LM2904VQDRG4Q1 is supplied in Cut Tape (CT) and Digi-Reel format, while LM2904VQDRQ1 is supplied in Tape & Reel (TR) format. Electrical specifications, temperature range, and performance characteristics are identical. Selection depends on procurement and assembly requirements.
Q: Why does the LM258ADR have a narrower temperature range than the LM358MX?
A: The LM258ADR is specified for -25°C to 85°C operation, which does not extend to the LM358MX's -40°C minimum. This reflects different design grades and qualification levels. The LM258ADR is suitable for commercial and industrial applications within the -25°C to 85°C window but is not appropriate for applications requiring operation below -25°C.
Q: Are there supply voltage limitations when substituting the LM358MX?
A: The LM358MX supports supply voltages up to 32V. Most recommended substitutes (LM2904 series) are rated to 26V or 30V maximum. Applications designed for the full 32V range should use the LM258ADR or LM258DRG4, which maintain 32V maximum rating. For applications operating at 26V or below, all recommended substitutes are fully compatible.
Q: What is the significance of the input offset voltage difference between the LM358MX (1 mV) and other substitutes (2-3 mV)?
A: Input offset voltage determines the DC error at the amplifier output with zero differential input. The LM358MX specifies 1 mV maximum offset, while most LM2904 variants specify 3 mV. For precision applications requiring minimal DC error, the LM2904AVQDR (1 mV offset) provides the closest match. For general-purpose applications, the 2-3 mV offset of alternative parts is typically acceptable and does not impact functionality.
Q: Can the LM258DR2G (onsemi) be used as a substitute despite higher input bias current?
A: The LM258DR2G features 45 nA input bias current compared to the LM358MX's 20 nA. This higher bias current is acceptable in applications where input impedance is not critical or where bias current compensation is not required. For high-impedance input circuits or precision transimpedance applications, the lower bias current of the LM2904 series is preferred.
Q: What packaging considerations apply when substituting the LM358MX?
A: The LM358MX uses 8-SOP packaging. Recommended substitutes employ 8-SOIC packaging. Both package types are mechanically and electrically compatible for surface mount assembly, with identical pin pitch (0.050") and body width (3.90mm). PCB footprints designed for 8-SOP accommodate 8-SOIC devices without modification. Verify footprint compatibility with your specific PCB design before implementation.
Q: Are all recommended substitutes RoHS3 compliant?
A: Yes, all recommended substitute parts maintain RoHS3 compliance and MSL rating of 1 (unlimited moisture sensitivity). This ensures compatibility with modern manufacturing processes and environmental regulations.
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