LM224DRG3 Equivalent & Substitute Parts

Part Overview

The LM224DRG3 is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in 14-SOIC surface mount packaging. This component is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The LM224DRG3 operates across a wide supply voltage range of 3V to 30V and is suitable for applications requiring low input bias current and moderate bandwidth performance. Due to its Last Time Buy status, identification of functionally equivalent substitute parts is necessary for design continuity and long-term component sourcing.

Key Parameters

Parameter	LM224DRG3 Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	0.5	V/µs
Gain Bandwidth Product	1.2	MHz
Current - Input Bias	20	nA
Voltage - Input Offset	3	mV
Current - Supply (x4 Channels)	1.4	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-25°C ~ 85°C	—
Package / Case	14-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 LM224DRG3 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

Number of circuits: Must equal 4
Package type: Must be 14-SOIC or equivalent 14-pin surface mount configuration
Mounting type: Surface mount only
Supply voltage range: Minimum 3V, maximum ≥30V
Input bias current: 20 nA or lower
Voltage input offset: ≤3 mV
Output current per channel: ≥30 mA
Gain bandwidth product: ≥1.0 MHz
Operating temperature range: Must encompass or exceed -25°C to 85°C
RoHS3 compliance and MSL Level 1 required

Substitute parts are grouped into two categories based on product status and availability:

Category A - Active Production (Preferred): LM224DT, LM224D, LM124DT, LM224DR2G, LM2902WYDT, LM324ADT, and LM324AD. These parts maintain active manufacturing status with full inventory availability.

Category B - Limited Availability: LM224DR (UMW), LM2902DT (Rohm). These parts meet electrical specifications but have restricted production status or alternative packaging configurations.

Parameter Comparison

Parameter	LM224DRG3 (TI)	LM224DT (STM)	LM224D (STM)	LM124DT (STM)	LM224DR2G (onsemi)	LM2902WYDT (STM)	LM324ADT (STM)
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4
Slew Rate (V/µs)	0.5	0.4	0.4	0.4	—	0.4	0.4
Gain Bandwidth Product (MHz)	1.2	1.3	1.2	1.3	1.0	1.3	1.3
Current - Input Bias (nA)	20	20	20	20	90	20	20
Voltage - Input Offset (mV)	3	2	2	2	2	2	2
Current - Supply (mA)	1.4	1.5	1.5	1.5	—	1.5	1.5
Current - Output / Channel (mA)	30	40	40	40	40	40	40
Voltage - Supply Span Min (V)	3	3	3	3	3	3	3
Voltage - Supply Span Max (V)	30	30	30	30	32	30	30
Operating Temperature (°C)	-25 ~ 85	-40 ~ 105	-40 ~ 105	-55 ~ 125	-25 ~ 85	-40 ~ 125	0 ~ 70
Package / Case	14-SOIC	14-SO	14-SO	14-SO	14-SOIC	14-SO	14-SO
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Level	1	1	1	1	1	1	1

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LM224DT (STMicroelectronics) and LM224D (STMicroelectronics) are direct functional equivalents with active production status. Both maintain identical circuit count, package configuration, and supply voltage specifications. LM224DT offers superior inventory availability (35,200 pcs) in Cut Tape & Digi-Reel packaging, suitable for high-volume production environments. LM224D is available in Tube packaging (4,495 pcs) for lower-volume applications. Both parts demonstrate improved input offset voltage (2 mV vs. 3 mV) and higher output current capability (40 mA vs. 30 mA per channel), with extended operating temperature range (-40°C to 105°C).

Secondary Substitutes (Extended Temperature Range):

LM124DT (STMicroelectronics) provides the widest operating temperature range (-55°C to 125°C) with differential output configuration. This part is suitable for applications requiring enhanced thermal performance. LM2902WYDT (STMicroelectronics) includes automotive-grade qualification (AEC-Q100) with push-pull output configuration and extended temperature range (-40°C to 125°C), appropriate for automotive and industrial applications.

Alternative Substitutes (Conditional Use):

LM224DR2G (onsemi) maintains active status with identical package and circuit configuration but exhibits higher input bias current (90 nA vs. 20 nA). This part is suitable only for applications where input bias current specification is not critical. LM324ADT (STMicroelectronics) operates within commercial temperature range (0°C to 70°C) and is not recommended for designs requiring the full -25°C to 85°C operating window of the original part.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols. REACH status remains unaffected across all substitute options.

Frequently Asked Questions (FAQ)

Q1: Can LM224DT directly replace LM224DRG3 in existing PCB designs?

A: Yes. LM224DT is a direct functional substitute with identical 14-SOIC package footprint, pin configuration, and electrical specifications. No PCB layout modifications are required. The part is pin-compatible and electrically interchangeable for all standard applications.

Q2: What is the difference between LM224DT and LM224D packaging?

A: LM224DT is supplied in Cut Tape & Digi-Reel packaging for automated pick-and-place assembly, while LM224D is supplied in Tube packaging for manual handling or lower-volume production. Both parts are electrically identical. Selection depends on manufacturing process requirements and volume.

Q3: Why does LM224DR2G show higher input bias current (90 nA)?

A: LM224DR2G is manufactured by onsemi using different process technology, resulting in higher input bias current specification. This part is suitable only for applications where input bias current does not affect circuit performance. For precision applications requiring 20 nA input bias current, use LM224DT or LM224D instead.

Q4: Is LM2902WYDT suitable for non-automotive applications?

A: Yes. LM2902WYDT is automotive-qualified (AEC-Q100) but fully functional in commercial and industrial applications. The automotive qualification provides additional process control and reliability assurance. This part is appropriate for any application requiring extended temperature range (-40°C to 125°C) and push-pull output configuration.

Q5: Can LM324ADT replace LM224DRG3?

A: LM324ADT is electrically compatible but operates only within 0°C to 70°C temperature range, compared to LM224DRG3's -25°C to 85°C range. Use LM324ADT only if your application operates within the 0°C to 70°C window. For full temperature range coverage, use LM224DT or LM224D.

Q6: What is the significance of "Last Time Buy" status for LM224DRG3?

A: Last Time Buy indicates Texas Instruments has discontinued production and will not accept new orders after a specified date. Existing inventory (3,021 pcs) represents the final available stock. Immediate transition to active substitute parts is recommended for long-term design continuity.

Q7: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing standards and environmental regulations.

Q8: Which substitute offers the best inventory availability?

A: LM324DT (Rohm Semiconductor) provides the highest inventory level at 405,100 pcs, followed by LM224DT (STMicroelectronics) at 35,200 pcs. However, LM324DT is marked "Not For New Designs." For new designs, LM224DT is the preferred choice with substantial inventory availability.

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