LM2902WYDT Equivalent & Substitute Parts

Part Overview

The LM2902WYDT is a general-purpose operational amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit push-pull amplifier in a 14-SO surface mount package. This device is actively produced and qualified to AEC-Q100 automotive standards, making it suitable for automotive and industrial applications requiring reliable amplification across extended temperature ranges.

Substitute parts become necessary when the primary device experiences supply chain constraints, extended lead times, or when design flexibility permits selection from alternative manufacturers offering equivalent electrical and mechanical characteristics. The parts listed below provide functional equivalence based on matching core parameters including circuit count, package form factor, electrical specifications, and operating temperature ranges.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Push-Pull	—
Slew Rate	0.4	V/µs
Gain Bandwidth Product	1.3	MHz
Current - Input Bias	20	nA
Voltage - Input Offset	2	mV
Current - Supply (per 4 Channels)	1.5	mA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40 to 125	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q100	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the LM2902WYDT is determined by the following critical parameters:

Primary Matching Criteria:

Number of circuits: 4 (mandatory)
Package form factor: 14-SOIC with 0.154" (3.90mm) width (mandatory for PCB compatibility)
Mounting type: Surface mount (mandatory)
Current - Input Bias: 20 nA (standard specification)
Voltage - Input Offset: 2 mV (standard specification)
Voltage - Supply Span: minimum 3 V, maximum 30 V or greater (operational envelope)
Operating temperature range: -40°C to 125°C or broader (functional requirement)

Secondary Considerations:

Slew rate and gain bandwidth product variations are acceptable when the substitute meets or exceeds the primary electrical specifications
Output type (push-pull vs. unspecified) does not preclude substitution when all other parameters align
Automotive grade and AEC-Q100 qualification are preferred but not absolute requirements for non-safety-critical applications
Product status (active, obsolete, or last-time-buy) affects long-term availability but does not affect electrical compatibility

Substitute parts are grouped into two categories: Direct Equivalents (matching all critical parameters with active product status) and Compatible Alternatives (meeting electrical and mechanical requirements with variations in secondary parameters or product status).

Parameter Comparison

Part Number	Manufacturer	Circuits	Output Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Supply Span (V)	Temp Range (°C)	Package	Status
LM2902WYDT	STMicroelectronics	4	Push-Pull	0.4	1.3	20	2	1.5	40	3–30	-40 to 125	14-SOIC	Active
AS324AMTR-G1	Diodes Incorporated	4	—	—	—	20	2	1	40	3–36	-40 to 85	14-SOIC	Active
AS324MTR-E1	Diodes Incorporated	4	—	—	—	20	2	1	40	3–36	-40 to 85	14-SOIC	Active
AS324MTR-G1	Diodes Incorporated	4	—	—	—	20	2	1	40	3–36	-40 to 85	14-SOIC	Active
BA2902SF-E2	Rohm Semiconductor	4	—	0.2	0.5	20	2	0.7	30	3–32	-40 to 105	14-SOIC	Active
LM124D	STMicroelectronics	4	Differential	0.4	1.2	20	2	1.5	30	3–30	-55 to 125	14-SOIC	Obsolete
LM124DG4	Texas Instruments	4	Differential	0.5	1.2	20	3	1.4	30	3–30	-55 to 125	14-SOIC	Last Time Buy
LM124DR	Texas Instruments	4	Differential	0.5	1.2	20	3	1.4	30	3–30	-55 to 125	14-SOIC	Active
LM124DRG4	Texas Instruments	4	Differential	0.5	1.2	20	3	1.4	30	3–30	-55 to 125	14-SOIC	Discontinued
LM224AD	STMicroelectronics	4	—	0.4	1.2	20	2	1.5	30	3–30	-40 to 105	14-SOIC	Obsolete
LM224D	STMicroelectronics	4	—	0.4	1.2	20	2	1.5	40	3–30	-40 to 105	14-SOIC	Active

Engineering Selection Recommendations

Tier 1: Direct Equivalents (Preferred)

The following parts are recommended as primary substitutes due to active product status, matching electrical specifications, and confirmed availability:

LM224D (STMicroelectronics): Active status, identical supply voltage range (3–30 V), matching input bias and offset specifications, 40 mA output current per channel, and 14-SOIC package. Operating temperature range of -40°C to 105°C covers the primary application window. This part is manufactured by the same supplier as the LM2902WYDT and maintains full compatibility.
LM124DR (Texas Instruments): Active status, 14-SOIC package, matching input bias specification (20 nA), extended operating temperature range (-55°C to 125°C), and supply voltage compatibility (3–30 V). Slew rate of 0.5 V/µs exceeds the LM2902WYDT specification. This part is suitable for applications requiring extended temperature performance.

Tier 2: Compatible Alternatives (Secondary Options)

The following parts meet core electrical and mechanical requirements but exhibit variations in secondary parameters or product status:

AS324MTR-G1 (Diodes Incorporated): Active status, 14-SOIC package, matching input bias and offset specifications, extended supply voltage range (3–36 V). Operating temperature range of -40°C to 85°C is narrower than the primary part. Supply current is reduced to 1 mA per 4 channels, indicating lower power consumption. Moisture sensitivity level is 1 (unlimited), matching the primary part.
AS324MTR-E1 (Diodes Incorporated): Active status with high inventory availability (56,300 units), 14-SOIC package, matching electrical specifications. Operating temperature range of -40°C to 85°C and moisture sensitivity level of 3 (168 hours) represent minor deviations from the primary part.
BA2902SF-E2 (Rohm Semiconductor): Active status, 14-SOIC package, matching input bias and offset specifications. Slew rate of 0.2 V/µs and gain bandwidth product of 500 kHz are reduced compared to the LM2902WYDT. Output current per channel is 30 mA versus 40 mA. Supply current is 700 µA, indicating lower power consumption. Operating temperature range of -40°C to 105°C is acceptable for most applications.

Tier 3: Legacy or Restricted Availability (Not Recommended for New Designs)

LM124D (STMicroelectronics): Obsolete status restricts long-term availability.
LM124DG4 (Texas Instruments): Last-time-buy status indicates production discontinuation.
LM124DRG4 (Texas Instruments): Discontinued at DiGi Electronics; future availability is uncertain.
LM224AD (STMicroelectronics): Obsolete status restricts procurement.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory requirements of the LM2902WYDT. The LM2902WYDT carries AEC-Q100 automotive qualification; substitute parts without this certification are suitable for non-automotive or non-safety-critical applications. For automotive applications requiring AEC-Q100 qualification, the LM2902WYDT remains the specified choice.

Frequently Asked Questions (FAQ)

Q: Can I substitute the LM2902WYDT with the AS324MTR-G1 in my design?

A: Yes, the AS324MTR-G1 is electrically and mechanically compatible. Both devices feature 4 circuits in a 14-SOIC package with matching input bias (20 nA) and input offset (2 mV) specifications. The AS324MTR-G1 operates across -40°C to 85°C, which covers most industrial and consumer applications. If your design requires operation above 85°C, the LM224D or LM124DR are preferred alternatives.

Q: What is the difference between push-pull and differential output types?

A: The LM2902WYDT specifies push-pull output, while several substitute parts (LM124D, LM124DG4, LM124DR, LM124DRG4) specify differential output. Both output configurations are compatible with standard operational amplifier applications. The output type designation reflects the internal circuit topology but does not affect external circuit compatibility when used in standard feedback configurations.

Q: Why does the BA2902SF-E2 have a lower slew rate (0.2 V/µs) than the LM2902WYDT (0.4 V/µs)?

A: The BA2902SF-E2 is designed for lower-speed applications and exhibits reduced power consumption (700 µA total supply current versus 1.5 mA for the LM2902WYDT). Slew rate determines the maximum rate of change of output voltage. Applications requiring high-speed signal processing or fast transient response should select parts with slew rates matching or exceeding 0.4 V/µs, such as the LM124DR (0.5 V/µs).

Q: Is the 14-SOIC package with 0.154" width compatible with 14-SOIC packages of 0.173" width?

A: No. The LM2902WYDT specifies 14-SOIC with 0.154" (3.90mm) width. The BA2902SF-E2 specifies 14-SOIC with 0.173" (4.40mm) width. These are distinct package variants with different physical dimensions. PCB footprints are not interchangeable. Verify package dimensions against your PCB design before selecting a substitute.

Q: Can I use the LM124D as a substitute if my application requires AEC-Q100 qualification?

A: No. The LM124D is marked as obsolete and does not carry active AEC-Q100 qualification status. For automotive applications requiring AEC-Q100 compliance, the LM2902WYDT is the specified choice. The LM124DR (Texas Instruments) is active and suitable for automotive applications, but verify AEC-Q100 status with the manufacturer before use in safety-critical systems.

Q: What is the significance of moisture sensitivity level (MSL)?

A: Moisture sensitivity level indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering without risk of moisture-induced failure. The LM2902WYDT and most recommended substitutes carry MSL 1 (unlimited), meaning they can be stored indefinitely without moisture precautions. The AS324MTR-E1 and AS324AMTR-G1 carry MSL 3 (168 hours), requiring storage in dry conditions or desiccant packaging. For high-volume manufacturing with extended lead times, MSL 1 parts are preferred.

Q: Which substitute offers the lowest power consumption?

A: The BA2902SF-E2 offers the lowest supply current at 700 µA total (for 4 channels), compared to 1.5 mA for the LM2902WYDT and 1 mA for the AS324 series. If power consumption is a critical design parameter, the BA2902SF-E2 is the optimal choice, provided the reduced slew rate (0.2 V/µs) and gain bandwidth product (500 kHz) are acceptable for your application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this document carry ROHS3 compliance status, matching the environmental requirements of the LM2902WYDT. All parts are also REACH unaffected, confirming compliance with European chemical regulations.

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