LM2902MX Equivalent & Substitute Parts

Part Overview

The LM2902MX is a general-purpose operational amplifier integrated circuit manufactured by onsemi, featuring four independent amplifier circuits in a 14-SOP surface mount package. This device is classified as obsolete, indicating discontinued production and limited availability for new designs. The LM2902MX operates across a wide supply voltage range of 3V to 32V with an operating temperature range of -40°C to 105°C, making it suitable for industrial and extended-temperature applications.

Due to its obsolete status, active substitute parts with equivalent or superior electrical characteristics are necessary for ongoing production, maintenance, and new design implementations. The following substitute parts maintain functional compatibility while offering improved availability and, in many cases, enhanced performance specifications.

Key Parameters

Parameter	LM2902MX	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	Circuits
Gain Bandwidth Product	1	MHz
Current - Input Bias	90	nA
Voltage - Input Offset	2	mV
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	32	V
Operating Temperature Range	-40 to 105	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the LM2902MX are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Number of Circuits: 4 (all substitutes maintain this requirement)
Package Type: 14-SOIC surface mount (identical footprint and pinout)
Gain Bandwidth Product: 1 MHz (baseline performance specification)
Supply Voltage Range: 3V to 32V minimum (all substitutes meet or exceed this range)
Current - Output / Channel: 30 mA minimum (all substitutes provide 40 mA or higher)

Substitution Categories:

Category 1: Direct LM2902 Series Variants (Active Status) Parts LM224DR2G, LM2902DR2G, and LM2902VDR2G are active production variants of the LM2902 base product. These maintain identical electrical specifications to the LM2902MX while offering improved availability and extended temperature options. Differences are limited to packaging format (Cut Tape vs. Tape & Reel) and operating temperature ranges.

Category 2: LM324 Series (Active Status, Lower Input Bias Current) Parts LM324ADR2G and LM324DR2G are LM324-based general-purpose amplifiers with identical 1 MHz gain bandwidth product and 4-circuit configuration. These parts feature reduced input bias current (40 nA vs. 90 nA) and are suitable for applications requiring lower input current characteristics. Operating temperature range is limited to 0°C to 70°C.

Category 3: MC33074/MC34074 Series (Active Status, Enhanced Performance) Parts MC33074ADR2G, MC33074DR2G, MC34074ADR2G, MC34074DR2G, and MC34074VDR2G offer enhanced electrical performance with 4.5 MHz gain bandwidth product, 13V/µs slew rate, and single-ended output configuration. These parts are suitable for applications requiring higher bandwidth and faster slew rate performance. Supply voltage range extends to 44V maximum.

Parameter Comparison

Part Number	Manufacturer	Product Status	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Output Current (mA)	Temp Range (°C)	Supply Max (V)	Packaging
LM2902MX	onsemi	Obsolete	1	90	2	30	-40 to 105	32	14-SOP
LM224DR2G	onsemi	Active	1	90	2	40	-25 to 85	32	14-SOIC
LM2902DR2G	onsemi	Active	1	90	2	40	-40 to 105	32	14-SOIC
LM2902VDR2G	onsemi	Active	1	90	2	40	-40 to 125	32	14-SOIC
LM324ADR2G	onsemi	Active	1	40	2	40	0 to 70	32	14-SOIC
LM324DR2G	onsemi	Active	1	90	2	40	0 to 70	32	14-SOIC
MC33074ADR2G	onsemi	Active	4.5	100	0.5	30	-40 to 85	44	14-SOIC
MC33074DR2G	onsemi	Active	4.5	100	1	30	-40 to 85	44	14-SOIC
MC34074ADR2G	onsemi	Active	4.5	100	0.5	30	0 to 70	44	14-SOIC
MC34074DR2G	onsemi	Active	4.5	100	1	30	0 to 70	44	14-SOIC
MC34074VDR2G	onsemi	Active	4.5	100	1	30	-40 to 125	44	14-SOIC

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

LM2902DR2G is the primary recommended substitute for the LM2902MX. This part maintains identical electrical specifications (1 MHz GBW, 90 nA input bias, 2 mV input offset) while offering active production status and improved availability. The operating temperature range of -40°C to 105°C matches the original specification. The 14-SOIC package is mechanically compatible with the 14-SOP footprint for PCB layout purposes. This part is ROHS3 compliant and carries unlimited moisture sensitivity level (MSL 1).

LM2902VDR2G provides an extended temperature variant with identical electrical performance and an operating range of -40°C to 125°C, suitable for applications requiring enhanced thermal performance. This part is supplied in Tape & Reel packaging format.

For Applications with Relaxed Temperature Requirements:

LM224DR2G is suitable for applications operating within -25°C to 85°C. This part provides identical electrical specifications to the LM2902MX with improved output current capability (40 mA vs. 30 mA per channel).

For Applications Requiring Lower Input Bias Current:

LM324DR2G offers reduced input bias current (90 nA specification maintained, but LM324ADR2G variant provides 40 nA) while maintaining 1 MHz gain bandwidth product. Operating temperature range is limited to 0°C to 70°C. This substitution is appropriate for precision analog applications where input bias current is a critical parameter.

For Applications Requiring Enhanced Bandwidth and Slew Rate:

MC34074VDR2G provides 4.5 MHz gain bandwidth product with 13V/µs slew rate, extended supply voltage range to 44V, and operating temperature range of -40°C to 125°C. This substitution is appropriate for applications requiring higher-speed signal processing or wider supply voltage tolerance. All MC34074 variants feature single-ended output configuration.

All recommended substitutes are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification, matching the regulatory status of the original LM2902MX.

Frequently Asked Questions (FAQ)

Q: Can LM2902DR2G be used as a direct pin-for-pin replacement for LM2902MX?

A: LM2902DR2G maintains identical pinout and electrical specifications with the LM2902MX. The primary difference is the package designation (14-SOIC vs. 14-SOP), which refers to the same physical footprint and lead configuration. PCB layout compatibility is confirmed. Electrical performance is identical across all specified parameters.

Q: What is the difference between LM2902DR2G and LM2902VDR2G?

A: Both parts maintain identical electrical specifications and 1 MHz gain bandwidth product. The difference is the operating temperature range: LM2902DR2G operates from -40°C to 105°C, while LM2902VDR2G extends to -40°C to 125°C. Additionally, LM2902VDR2G is supplied in Tape & Reel packaging format, while LM2902DR2G is available in Cut Tape format. Selection depends on thermal requirements and packaging format compatibility with assembly equipment.

Q: When should MC34074VDR2G be selected instead of LM2902DR2G?

A: MC34074VDR2G is selected when applications require higher bandwidth (4.5 MHz vs. 1 MHz), faster slew rate (13V/µs), or extended supply voltage range (up to 44V vs. 32V). The MC34074VDR2G also provides extended temperature range to 125°C. These enhancements are appropriate for high-speed signal conditioning, audio amplification, or applications with demanding dynamic performance requirements. The trade-off is higher input bias current (100 nA vs. 90 nA).

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the regulatory status of the LM2902MX. Moisture sensitivity level is MSL 1 (unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Q: What is the significance of the packaging format (Cut Tape vs. Tape & Reel)?

A: Packaging format affects supply method and assembly equipment compatibility. Cut Tape (CT) format is suitable for manual assembly or lower-volume production. Tape & Reel (TR) format is optimized for automated pick-and-place assembly equipment and higher-volume production runs. Electrical specifications and device performance are identical regardless of packaging format. Selection depends on manufacturing process requirements.

Q: Can LM324DR2G replace LM2902MX in all applications?

A: LM324DR2G maintains identical 1 MHz gain bandwidth product and 4-circuit configuration. However, the operating temperature range is limited to 0°C to 70°C, which is narrower than the LM2902MX specification of -40°C to 105°C. This substitution is appropriate only for applications operating within the 0°C to 70°C range. For extended temperature applications, LM2902DR2G or LM2902VDR2G are required.

Q: What inventory availability should be considered for production planning?

A: LM2902DR2G offers the highest inventory availability at 205,100 pieces, followed by LM324DR2G at 105,300 pieces. MC34074DR2G provides 25,200 pieces. These inventory levels support both immediate requirements and ongoing production needs. The original LM2902MX, with 2,887 pieces in stock, has limited availability due to obsolete status.

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