LM224M Equivalent & Substitute Parts

Part Overview

The LM224M is a general-purpose operational amplifier integrated circuit containing four independent amplifier circuits in a 14-SOP surface mount package. Manufactured by onsemi, this component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production continuity. The LM224M operates across a supply voltage range of 3V to 32V with an operating temperature range of -25°C to 85°C, making it suitable for general-purpose analog signal processing applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Current - Input Bias	40	nA
Voltage - Input Offset	1.5	mV
Current - Supply	1	mA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	32	V
Operating Temperature	-25 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LM224M is determined by the following critical parameters:

Functional Compatibility:

Four independent general-purpose amplifier circuits
Supply voltage range: 3V to 32V minimum
Output current capability: 40 mA per channel minimum
Input bias current: 40 nA or lower
Input offset voltage: 2 mV or lower

Package Compatibility:

14-SOIC surface mount package (0.154", 3.90mm width)
Moisture sensitivity level MSL 1

Operational Compatibility:

Operating temperature range must encompass or exceed -25°C to 85°C
RoHS3 compliance for modern manufacturing environments

Substitute parts are grouped into two categories: direct equivalents from onsemi (LM224DR2G, LM224D variants) and functionally compatible alternatives from other manufacturers (STMicroelectronics LM224D, Texas Instruments LM224DRG3, LM224KDR, and UMW LM224DR). Additional similar-function parts include LM2902 and NCV2902 series variants, which maintain electrical compatibility while offering extended temperature ranges or automotive-grade specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Input Bias (nA)	Input Offset (mV)	Output / Channel (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	RoHS Status
LM224M	onsemi	Obsolete	40	1.5	40	3	32	-25 to 85	14-SOIC	—
LM224DR2G	onsemi	Active	90	2	40	3	32	-25 to 85	14-SOIC	ROHS3
LM2902DR2G	onsemi	Active	90	2	40	3	32	-40 to 105	14-SOIC	ROHS3
LM2902VDR2G	onsemi	Active	90	2	40	3	32	-40 to 125	14-SOIC	ROHS3
LM324ADR2G	onsemi	Active	40	2	40	3	32	0 to 70	14-SOIC	ROHS3
LM324DR2G	onsemi	Active	90	2	40	3	32	0 to 70	14-SOIC	ROHS3
NCV2902DR2G	onsemi	Active	90	2	40	3	32	-40 to 125	14-SOIC	ROHS3
LM224D	STMicroelectronics	Active	20	2	40	3	30	-40 to 105	14-SOIC	ROHS3
LM224DR	UMW	Active	20	3	30	3	32	-20 to 85	14-SOIC	ROHS3
LM224DRG3	Texas Instruments	Last Time Buy	20	3	30	3	30	-25 to 85	14-SOIC	ROHS3
LM224KDR	Texas Instruments	Active	20	3	30	3	30	-25 to 85	14-SOIC	ROHS3

Engineering Selection Recommendations

Primary Substitutes (onsemi LM224 Series):

LM224DR2G is the direct active equivalent from onsemi. It maintains the same supply voltage range (3V to 32V), output current capability (40 mA per channel), and operating temperature range (-25°C to 85°C) as the LM224M. The primary difference is increased input bias current (90 nA versus 40 nA) and slightly higher input offset voltage (2 mV versus 1.5 mV). This part is ROHS3 compliant and available in high volume (105,200 units in stock).

Extended Temperature Range Alternatives (onsemi LM2902 Series):

LM2902DR2G and LM2902VDR2G provide identical electrical performance to LM224DR2G with extended operating temperature ranges (-40°C to 105°C and -40°C to 125°C respectively). These parts are suitable for applications requiring operation beyond the standard -25°C to 85°C range. Both are ROHS3 compliant and available in high volume.

Automotive-Grade Alternative (onsemi NCV2902):

NCV2902DR2G is an automotive-qualified variant with identical electrical specifications to the LM2902 series and an operating temperature range of -40°C to 125°C. This part is appropriate for automotive and harsh-environment applications.

Industrial Temperature Range (onsemi LM324 Series):

LM324ADR2G matches the input bias current specification (40 nA) of the LM224M but operates only across 0°C to 70°C. This part is suitable for industrial applications within this narrower temperature range. LM324DR2G provides the same supply voltage and output current specifications but with higher input bias current (90 nA) and the same 0°C to 70°C operating range.

Cross-Manufacturer Alternatives:

STMicroelectronics LM224D, Texas Instruments LM224DRG3 and LM224KDR, and UMW LM224DR all provide four-circuit general-purpose amplifiers in 14-SOIC packages with ROHS3 compliance. These parts exhibit lower input bias currents (20 nA) compared to the LM224M but may have slightly reduced output current capability (30 mA per channel for TI and UMW variants) or maximum supply voltage (30V for STMicroelectronics and TI variants). Texas Instruments LM224DRG3 is classified as Last Time Buy, indicating limited future availability.

Selection Criteria:

For direct replacement with maximum compatibility, select LM224DR2G. For applications requiring extended temperature operation, select LM2902DR2G or LM2902VDR2G. For automotive applications, select NCV2902DR2G. All recommended substitutes are ROHS3 compliant and available in high volume from current inventory.

Frequently Asked Questions (FAQ)

Q: Can LM224DR2G directly replace LM224M in all applications?

A: LM224DR2G is electrically compatible with LM224M across all critical parameters: four amplifier circuits, 3V to 32V supply range, 40 mA output per channel, and -25°C to 85°C operating temperature. The input bias current is higher (90 nA versus 40 nA) and input offset voltage is slightly higher (2 mV versus 1.5 mV), which may affect precision analog applications requiring extremely low input bias current. For general-purpose applications, LM224DR2G is a direct replacement.

Q: What is the difference between LM224DR2G and LM2902DR2G?

A: Both parts are manufactured by onsemi and share identical electrical specifications. The primary difference is operating temperature range: LM224DR2G operates from -25°C to 85°C, while LM2902DR2G operates from -40°C to 105°C. Select LM2902DR2G for applications requiring operation at temperatures below -25°C or above 85°C.

Q: Why does LM224D from STMicroelectronics have a lower input bias current than LM224M?

A: STMicroelectronics LM224D exhibits 20 nA input bias current compared to LM224M's 40 nA. This represents improved performance in this parameter. However, STMicroelectronics LM224D has a maximum supply voltage of 30V (versus 32V for LM224M) and operates across -40°C to 105°C. Verify that the 30V maximum supply voltage is acceptable for your application before selecting this part.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The original LM224M does not specify RoHS status. ROHS3 compliance is required for most modern manufacturing environments and is standard across all recommended active alternatives.

Q: What is the significance of "Last Time Buy" status for LM224DRG3?

A: Last Time Buy status indicates that Texas Instruments will discontinue LM224DRG3 and will not accept new orders after a specified date. Current inventory is limited (3,021 units). This part should not be selected for new designs requiring long-term component availability. Select LM224KDR (also from Texas Instruments, Active status) or onsemi alternatives for ongoing production.

Q: Can I use LM324ADR2G if my application operates only between 0°C and 70°C?

A: Yes. LM324ADR2G is suitable for applications operating within 0°C to 70°C. It matches the input bias current specification of LM224M (40 nA) and maintains the same supply voltage range (3V to 32V) and output current capability (40 mA per channel). The narrower operating temperature range is the only limitation compared to LM224M.

Q: What is the difference between LM224DR (UMW) and LM224DR2G (onsemi)?

A: Both parts are 14-SOIC surface mount packages with four amplifier circuits. UMW LM224DR has lower input bias current (20 nA) but reduced output current per channel (30 mA versus 40 mA) and slightly higher input offset voltage (3 mV versus 2 mV). The maximum supply voltage is 32V for both. UMW LM224DR is suitable for applications not requiring the full 40 mA output current per channel.

Q: Is NCV2902DR2G suitable for non-automotive applications?

A: Yes. NCV2902DR2G is automotive-qualified but can be used in non-automotive applications. It provides identical electrical performance to LM2902DR2G with an extended operating temperature range of -40°C to 125°C. Select this part for applications requiring the widest temperature range or for designs that may transition to automotive use.

Q: What packaging options are available for substitute parts?

A: All substitute parts are available in 14-SOIC surface mount packages matching the LM224M footprint. Packaging variations include Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) options. Verify packaging format with your supplier to ensure compatibility with your assembly process.

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