LM2902N Equivalent & Substitute Parts

Part Overview

The LM2902N is a general-purpose operational amplifier featuring four independent circuits in a 14-DIP through-hole package. Manufactured by STMicroelectronics, this device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and production requirements. The LM2902N operates across a wide supply voltage range of 3V to 30V with a slew rate of 0.4V/µs and a gain bandwidth product of 1 MHz, making it suitable for general analog signal processing applications.

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	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
Mounting Type	Through Hole	—
Package / Case	14-DIP (0.300", 7.62mm)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LM2902N is determined by the following critical parameters: amplifier type (general purpose), number of circuits (4), mounting type (through hole vs. surface mount), package form factor, supply voltage range compatibility, and operating temperature range. Parts are grouped into two categories:

Category 1: Direct Through-Hole Package Substitutes (14-DIP) These parts maintain the same 14-DIP through-hole package as the LM2902N, enabling direct board-level replacement without PCB redesign. Substitutes in this category include LM2902KN, LM2902N/NOPB, LM324KN, LM324NE4, LP2902N, and LP2902N/NOPB. These parts are compatible with existing through-hole assembly processes and footprints.

Category 2: Surface-Mount Package Alternatives (14-SOIC) These parts provide functional equivalence but require different PCB layout and assembly methods. The LM2902D and LM2902DR2G utilize 14-SOIC surface-mount packaging, suitable for modern automated assembly processes. The LT1212CN#PBF, while maintaining 14-DIP through-hole packaging, offers enhanced performance characteristics.

Substitution logic is based on: (1) matching the four-circuit general-purpose amplifier configuration, (2) ensuring supply voltage range compatibility with the application, (3) verifying operating temperature range suitability, and (4) confirming package type compatibility with the PCB assembly method.

Parameter Comparison

Part Number	Manufacturer	Package Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Status
LM2902N	STMicroelectronics	14-DIP	0.4	1	20	2	40	3	30	-40 to 125	Obsolete
LM2902D	onsemi	14-SOIC	0.5	1.2	20	3	30	3	26	-40 to 125	Obsolete
LM2902DR2G	onsemi	14-SOIC	—	1	90	2	40	3	32	-40 to 105	Active
LM2902KN	Texas Instruments	14-DIP	0.5	1.2	20	3	30	3	26	-40 to 125	Active
LM2902N/NOPB	Texas Instruments	14-DIP	—	1	45	2	40	3	32	-40 to 85	Active
LM324KN	Texas Instruments	14-DIP	0.5	1.2	20	3	30	3	30	0 to 70	Active
LM324NE4	Texas Instruments	14-DIP	—	1.2	45	2	40	3	32	0 to 70	Last Time Buy
LP2902N	Texas Instruments	14-DIP	0.05	0.1	2	2	10	3	26	-40 to 85	Last Time Buy
LP2902N/NOPB	Texas Instruments	14-DIP	0.05	0.1	2	2	10	3	26	-40 to 85	Active
LT1212CN#PBF	Analog Devices Inc.	14-DIP	7	14	50	0.15	50	2.5	36	-40 to 85	Active

Engineering Selection Recommendations

For Direct Replacement (Through-Hole 14-DIP Package)

The LM2902KN (Texas Instruments, Active status) is the primary recommended substitute for the obsolete LM2902N. Both devices maintain identical 14-DIP through-hole packaging and operate across compatible supply voltage ranges (3V to 26V for LM2902KN vs. 3V to 30V for LM2902N). The LM2902KN exhibits marginally improved performance with a slew rate of 0.5V/µs and gain bandwidth product of 1.2 MHz compared to the LM2902N's 0.4V/µs and 1 MHz. The operating temperature range of -40°C to 125°C is identical. Active product status ensures continued availability and manufacturing support.

The LM2902N/NOPB (Texas Instruments, Active status) provides an alternative through-hole substitute with identical 14-DIP packaging. This variant operates within a reduced temperature range (-40°C to 85°C) and maximum supply voltage of 32V. RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) are confirmed.

For Extended Temperature Range Applications

The LM324KN (Texas Instruments, Active status) offers a through-hole 14-DIP package with performance characteristics similar to the LM2902KN. However, the operating temperature range is restricted to 0°C to 70°C, limiting applicability to industrial and consumer-grade applications. This part is suitable only when the full -40°C to 125°C range of the LM2902N is not required.

For Surface-Mount Assembly

The LM2902DR2G (onsemi, Active status) provides functional equivalence in 14-SOIC surface-mount packaging. This part is recommended for new designs utilizing automated surface-mount assembly processes. The device operates across a supply voltage range of 3V to 32V and temperature range of -40°C to 105°C. RoHS3 compliance is confirmed. Transition from through-hole to surface-mount packaging requires PCB redesign and assembly process modification.

For Low-Power Applications

The LP2902N/NOPB (Texas Instruments, Active status) is suitable for applications requiring reduced power consumption. This device exhibits significantly lower slew rate (0.05V/µs), gain bandwidth product (100 kHz), and output current per channel (10 mA) compared to the LM2902N. Supply current is reduced to 150µA. This part is appropriate only when application bandwidth and output current requirements are compatible with these reduced specifications.

For High-Performance Applications

The LT1212CN#PBF (Analog Devices Inc., Active status) provides enhanced performance in 14-DIP through-hole packaging. This device features a slew rate of 7V/µs, gain bandwidth product of 14 MHz, and output current of 50 mA per channel. The supply voltage range extends to 36V maximum. This part is suitable for applications requiring higher bandwidth and faster transient response than the LM2902N. Operating temperature range is -40°C to 85°C.

Frequently Asked Questions (FAQ)

Q: Can the LM2902N be replaced with a surface-mount package alternative?

A: Yes, the LM2902DR2G (14-SOIC package) provides functional equivalence. However, replacement requires PCB redesign to accommodate the different package footprint and assembly process modification to surface-mount technology. Direct board-level substitution without PCB changes is not possible.

Q: What is the primary difference between LM2902KN and LM2902N?

A: Both devices are four-circuit general-purpose amplifiers in 14-DIP through-hole packages. The LM2902KN (Texas Instruments, Active) offers improved slew rate (0.5V/µs vs. 0.4V/µs) and gain bandwidth product (1.2 MHz vs. 1 MHz). The LM2902N (STMicroelectronics, Obsolete) supports a maximum supply voltage of 30V compared to 26V for the LM2902KN. Both operate across the same temperature range (-40°C to 125°C).

Q: Is the LM324KN a suitable substitute for the LM2902N?

A: The LM324KN is functionally equivalent in terms of circuit configuration and through-hole packaging. However, the operating temperature range is restricted to 0°C to 70°C, compared to -40°C to 125°C for the LM2902N. The LM324KN is suitable only for applications that do not require the full temperature range of the original part.

Q: Why is the LP2902N not recommended as a direct substitute?

A: The LP2902N exhibits significantly different electrical characteristics. The slew rate is reduced to 0.05V/µs (vs. 0.4V/µs), gain bandwidth product is 100 kHz (vs. 1 MHz), and output current per channel is 10 mA (vs. 40 mA). These reduced specifications make the LP2902N unsuitable for applications requiring the performance level of the LM2902N. The LP2902N is appropriate only for low-bandwidth, low-power applications.

Q: What compliance certifications are relevant for substitute part selection?

A: All recommended substitute parts maintain RoHS3 compliance and REACH unaffected status, consistent with the original LM2902N. The LM2902D (onsemi) is RoHS non-compliant and should be avoided in applications requiring RoHS compliance. Moisture sensitivity level (MSL 1 - Unlimited) is confirmed for most active alternatives, indicating no special handling requirements during storage and assembly.

Q: Can the LT1212CN#PBF replace the LM2902N in existing designs?

A: The LT1212CN#PBF maintains 14-DIP through-hole packaging and can be physically installed in the same socket. However, this device exhibits significantly enhanced performance characteristics (7V/µs slew rate, 14 MHz gain bandwidth product) that may introduce circuit behavior changes. Verification of circuit stability and performance is required before implementation in existing designs. The LT1212CN#PBF is recommended for new designs requiring higher bandwidth and faster response.

Q: What is the inventory status of substitute parts?

A: The LM2902N/NOPB (Texas Instruments) has 19,859 units in stock. The LM2902KN has 5,192 units available. The LM2902DR2G (onsemi) has the highest inventory at 205,100 units. The LT1212CN#PBF has 979 units in stock. Inventory levels should be verified with suppliers for current availability and lead time requirements.

Q: Are there automotive-grade alternatives available?

A: The LM2902D (onsemi) carries AEC-Q100 automotive qualification and is suitable for automotive applications. However, this part is obsolete and RoHS non-compliant. For active automotive-qualified alternatives, consultation with component suppliers is recommended.

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