LM2902KNS Equivalent & Substitute Parts

Part Overview

The LM2902KNS is a general-purpose operational amplifier integrated circuit containing four independent amplifier circuits in a 14-SOIC surface mount package. Manufactured by Texas Instruments, this device is classified as obsolete product status. The LM2902KNS operates across a wide supply voltage range of 3V to 26V and is designed for applications requiring low-power, general-purpose amplification with moderate bandwidth characteristics.

Due to its obsolete product status, identifying equivalent and substitute parts is necessary for design continuity, procurement planning, and long-term production support. Active alternatives with comparable electrical performance and mechanical compatibility are available from multiple manufacturers.

Key Parameters

Parameter	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)	26	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	14-SOIC (0.209", 5.30mm Width)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LM2902KNS is determined by the following critical parameters:

Functional Equivalence Criteria:

Four independent general-purpose amplifier circuits
Slew rate between 0.05V/µs and 0.5V/µs
Gain bandwidth product between 100 kHz and 1.3 MHz
Input bias current between 2 nA and 45 nA
Input offset voltage between 1 mV and 3 mV
Output current per channel between 10 mA and 40 mA

Electrical Compatibility Criteria:

Minimum supply voltage: 3V or lower
Maximum supply voltage: 26V or higher
Operating temperature range: must encompass -40°C to 125°C or provide overlap with critical application range

Mechanical Compatibility Criteria:

Surface mount package type (SOIC or equivalent)
14-pin configuration
Pin-compatible footprint within standard SOIC width tolerances (0.154" to 0.209")

Compliance Criteria:

RoHS3 compliance required
Moisture sensitivity level 1 or 2 acceptable
REACH unaffected status

Substitute parts are grouped into two categories: Texas Instruments LinCMOS™ Series (LM2902M/NOPB, LM2902MX/NOPB, LP2902M/NOPB, LP2902MX/NOPB) offering active product status with enhanced specifications, and Alternative Manufacturer Options (BA2902F-E2, LM2902WDT, MC3303DT, MC3403DT, NJM2902M) providing functional equivalence with varying performance characteristics and temperature ranges.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	Package Width
LM2902KNS	Texas Instruments	Obsolete	0.5	1.2	20	3	1.4	30	-40 to 125	5.30mm
LM2902M/NOPB	Texas Instruments	Active	—	1	45	2	1.5	40	-40 to 85	3.90mm
LM2902MX/NOPB	Texas Instruments	Active	—	1	45	2	1.5	40	-40 to 85	3.90mm
LP2902M/NOPB	Texas Instruments	Active	0.05	0.1	2	2	0.085	10	-40 to 85	3.90mm
LP2902MX/NOPB	Texas Instruments	Active	0.05	0.1	2	2	0.085	10	-40 to 85	3.90mm
BA2902F-E2	Rohm Semiconductor	Active	0.2	0.5	20	2	0.7	30	-40 to 125	4.40mm
LM2902WDT	Rohm Semiconductor	Obsolete	0.3	1.3	20	1	1	40	-40 to 125	3.90mm
MC3303DT	STMicroelectronics	Active	0.5	1	40	1	2.8	30	-40 to 105	3.90mm
MC3403DT	STMicroelectronics	Active	0.5	1	40	1	2.8	30	0 to 70	3.90mm
NJM2902M	Nisshinbo Micro Devices Inc.	Active	0.5	0.5	20	2	1	40	-40 to 85	5.00mm

Engineering Selection Recommendations

For Direct Replacement with Extended Temperature Range:

The BA2902F-E2 (Rohm Semiconductor) provides the closest functional match to the LM2902KNS for applications requiring the full -40°C to 125°C operating temperature range. This device maintains equivalent input bias current (20 nA), output current capability (30 mA), and supply voltage range (3V to 32V maximum). The BA2902F-E2 is active product status with ROHS3 compliance and unlimited moisture sensitivity rating. Package width of 4.40mm is within acceptable SOIC tolerance variation.

For Active Product Status with Standard Temperature Range:

The LM2902M/NOPB and LM2902MX/NOPB (Texas Instruments LinCMOS™ Series) offer active product status with manufacturer support. These devices are functionally equivalent for applications operating within -40°C to 85°C. Both parts provide improved input offset voltage (2 mV versus 3 mV) and higher output current capability (40 mA versus 30 mA). The primary trade-off is reduced maximum supply voltage (32V versus 26V) and reduced operating temperature upper limit (85°C versus 125°C).

For Low-Power Applications:

The LP2902M/NOPB and LP2902MX/NOPB (Texas Instruments) are suitable for applications where supply current minimization is critical. These devices reduce supply current to 85µA (versus 1.4mA) and output current to 10 mA per channel. Trade-offs include significantly reduced gain bandwidth product (100 kHz versus 1.2 MHz) and slew rate (0.05V/µs versus 0.5V/µs).

For High Supply Voltage Applications:

The MC3303DT (STMicroelectronics) supports maximum supply voltage of 36V (versus 26V for LM2902KNS) and maintains equivalent slew rate (0.5V/µs) and gain bandwidth product (1 MHz). Operating temperature range is -40°C to 105°C. This device is active product status with ROHS3 compliance.

For Obsolete Product Replacement:

The LM2902WDT (Rohm Semiconductor) is also obsolete product status but remains in inventory. This device provides superior gain bandwidth product (1.3 MHz) and lower input offset voltage (1 mV) compared to the LM2902KNS, with equivalent operating temperature range (-40°C to 125°C).

All recommended substitutes maintain ROHS3 compliance, moisture sensitivity level 1 or 2, and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the LM2902M/NOPB directly replace the LM2902KNS in all applications?

A: The LM2902M/NOPB provides functional equivalence for applications operating within -40°C to 85°C. Applications requiring operation above 85°C must use BA2902F-E2 or LM2902WDT. The LM2902M/NOPB has higher maximum supply voltage (32V versus 26V), which is compatible with designs using 26V maximum. Pin configuration and package footprint are compatible.

Q: What is the difference between LM2902M/NOPB and LM2902MX/NOPB?

A: Both devices have identical electrical specifications and operating characteristics. The primary difference is packaging format: LM2902M/NOPB is supplied in Tube packaging, while LM2902MX/NOPB is supplied in Cut Tape (CT) and Digi-Reel® format. Selection depends on procurement and assembly requirements.

Q: Why do LP2902M/NOPB and LP2902MX/NOPB have lower supply current?

A: The LP2902 series uses different internal circuit design optimized for low-power operation. Supply current is reduced to 85µA per device (versus 1.4mA for LM2902KNS). This reduction is accompanied by lower gain bandwidth product (100 kHz versus 1.2 MHz) and reduced slew rate (0.05V/µs versus 0.5V/µs). These devices are suitable only for applications not requiring high-speed amplification.

Q: Is the BA2902F-E2 pin-compatible with the LM2902KNS?

A: Yes, the BA2902F-E2 maintains 14-pin SOIC configuration with equivalent pin assignments. Package width is 4.40mm compared to 5.30mm for the LM2902KNS. This variation is within standard SOIC tolerance and does not affect PCB footprint compatibility for typical surface mount assembly processes.

Q: What is the significance of the different package widths listed in the parameter table?

A: Package width variations (3.90mm, 4.40mm, 5.00mm, 5.30mm) reflect different SOIC manufacturing standards. All listed widths are within acceptable SOIC specifications and are compatible with standard 14-pin SOIC PCB footprints. Width differences do not affect electrical performance or pin connectivity.

Q: Can MC3303DT be used in applications requiring -40°C to 125°C operation?

A: No. The MC3303DT operating temperature range is -40°C to 105°C. Applications requiring operation above 105°C must use BA2902F-E2, LM2902WDT, or the original LM2902KNS. The MC3403DT variant has further restricted temperature range (0°C to 70°C) and is not suitable for extended temperature applications.

Q: What is the advantage of NJM2902M over other substitutes?

A: The NJM2902M (Nisshinbo Micro Devices Inc.) maintains equivalent slew rate (0.5V/µs) and input bias current (20 nA) to the LM2902KNS. It provides active product status with higher output current capability (40 mA versus 30 mA). The device is RoHS compliant with moisture sensitivity level 2 (1-year shelf life). Package width of 5.00mm is closest to the original LM2902KNS (5.30mm).

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant except NJM2902M, which is RoHS compliant (standard RoHS, not ROHS3). All parts maintain REACH unaffected status. Compliance verification should be confirmed with specific procurement documentation for critical applications.

Q: What is the difference between Tube, Cut Tape, and Tape & Reel packaging?

A: Tube packaging is used for manual assembly and small-quantity procurement. Cut Tape (CT) and Digi-Reel® format is used for semi-automated assembly. Tape & Reel (TR) format is used for high-volume automated assembly. Electrical specifications are identical across packaging formats; selection depends on assembly process and procurement volume requirements.

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