LM2902KDBR Equivalent & Substitute Parts

Part Overview

The LM2902KDBR is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-SSOP surface mount package. This part is classified as obsolete, though 803 units remain in stock as new original inventory. The LM2902KDBR serves applications requiring low-power, general-purpose amplification across industrial, consumer, and automotive domains.

Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and new product development. Active alternatives with compatible electrical and mechanical specifications are available from multiple manufacturers including onsemi, STMicroelectronics, Rohm Semiconductor, and Texas Instruments.

Substiute Parts

LM2902KDBR

Texas InstrumentsIn Stock: 822LM2902KDBR Datasheet

Current PartRFQ

LM2902MT/NOPB

Texas InstrumentsIn Stock: 873LM2902MT/NOPB Datasheet

MFR RecommendedRFQ

LM2902MTX/NOPB

Texas InstrumentsIn Stock: 2934LM2902MTX/NOPB Datasheet

MFR RecommendedRFQ

BA2902FV-E2

Rohm SemiconductorIn Stock: 10315BA2902FV-E2 Datasheet

MFR RecommendedRFQ

LM224DTBR2G

onsemiIn Stock: 37454LM224DTBR2G Datasheet

MFR RecommendedRFQ

LM224PT

STMicroelectronicsIn Stock: 56679LM224PT Datasheet

MFR RecommendedRFQ

LM2902DTBR2G

onsemiIn Stock: 3504LM2902DTBR2G Datasheet

MFR RecommendedRFQ

MC33174DTBR2G

onsemiIn Stock: 2988MC33174DTBR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2902KDBR is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Amplifier Type: General Purpose (4-circuit configuration)
• Number of Circuits: 4
• Mounting Type: Surface Mount
• Supply Voltage Range: Minimum 3V, Maximum ≥26V
• Operating Temperature Range: Must encompass or exceed -40°C to 125°C
• RoHS3 Compliance and MSL Level 1 status

Secondary Compatibility Parameters:

• Current - Input Bias: ≤20 nA (lower values acceptable)
• Voltage - Input Offset: ≤3 mV (lower values acceptable)
• Current - Output / Channel: ≥30 mA (higher values acceptable)
• Gain Bandwidth Product: ≥1.2 MHz (higher values acceptable)
• Slew Rate: ≥0.5 V/µs (higher values acceptable)

Package Considerations: The LM2902KDBR uses a 14-SSOP package (0.209", 5.30mm width). Substitute parts may use alternative 14-pin surface mount packages including 14-TSSOP (0.173", 4.40mm width) and 14-LSSOP (0.173", 4.40mm width), provided PCB layout and footprint compatibility are verified during design integration.

Substitutes are grouped into two categories: Direct Manufacturer Alternatives (Texas Instruments LM2902 series variants) and Cross-Manufacturer Equivalents (onsemi LM224/LM2902, STMicroelectronics LM224, Rohm Semiconductor BA2902).

Parameter Comparison

Engineering Selection Recommendations

Tier 1: Direct Manufacturer Replacement (Texas Instruments)

LM2902MT/NOPB and LM2902MTX/NOPB are active-status alternatives from the original manufacturer. Both maintain the LM2902 base product number and 4-circuit general-purpose configuration. These parts are ROHS3 compliant with MSL Level 1 rating. The primary trade-off is reduced maximum operating temperature (-40°C to 85°C versus -40°C to 125°C on the original). Supply voltage maximum increases to 32V. These parts are suitable for applications not requiring the full 125°C upper temperature limit.

Tier 2: Cross-Manufacturer Active Alternatives

LM224PT (STMicroelectronics) and LM2902DTBR2G (onsemi) provide active-status alternatives with extended temperature ranges. LM224PT operates from -40°C to 105°C and maintains a 30V maximum supply voltage. LM2902DTBR2G operates from -40°C to 105°C with 32V maximum supply. Both are ROHS3 compliant with MSL Level 1. These options balance supply chain diversity with temperature performance.

Tier 3: Enhanced Performance Alternative

MC33174DTBR2G (onsemi) offers superior slew rate (2.1 V/µs) and gain bandwidth product (1.8 MHz), with extended supply voltage range to 44V. Operating temperature is -40°C to 85°C. This part is suitable for applications requiring higher bandwidth or wider supply voltage tolerance, provided the reduced upper temperature limit is acceptable.

Tier 4: Low-Power Alternative

BA2902FV-E2 (Rohm Semiconductor) provides the widest operating temperature range (-40°C to 125°C) matching the original part. It features the lowest supply current (700µA total) and maintains 32V maximum supply voltage. This part is optimal for power-constrained applications requiring full temperature range operation.

Package Migration Considerations:

The original LM2902KDBR uses 14-SSOP (5.30mm width). All active substitutes use either 14-TSSOP (4.40mm width) or 14-LSSOP (4.40mm width). PCB footprint redesign is required. Pin-to-pin compatibility is maintained across all 14-pin variants.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace LM2902KDBR with LM2902MT/NOPB without PCB modification?

No. The LM2902KDBR uses a 14-SSOP package (5.30mm width), while LM2902MT/NOPB uses 14-TSSOP (4.40mm width). Although pin count and function are identical, the physical footprint differs. PCB layout modification is required. Pin-to-pin electrical compatibility is maintained.

Q2: What is the primary limitation of using LM2902MT/NOPB as a substitute?

The maximum operating temperature is reduced from 125°C to 85°C. Applications requiring operation above 85°C must use alternatives such as LM224PT (-40°C to 105°C), LM2902DTBR2G (-40°C to 105°C), or BA2902FV-E2 (-40°C to 125°C).

Q3: Which substitute offers the best temperature performance?

BA2902FV-E2 (Rohm Semiconductor) maintains the full -40°C to 125°C operating range of the original LM2902KDBR. It is the only active substitute matching this specification.

Q4: Is MC33174DTBR2G a suitable replacement for general-purpose applications?

MC33174DTBR2G is functionally compatible but offers enhanced performance characteristics: 2.1 V/µs slew rate (versus 0.5 V/µs original) and 1.8 MHz gain bandwidth product (versus 1.2 MHz original). It is suitable for general-purpose applications and provides performance margin. The maximum operating temperature is 85°C, limiting use in high-temperature environments.

Q5: What is the supply voltage compatibility range across all substitutes?

The original LM2902KDBR operates from 3V to 26V. All active substitutes support minimum 3V supply. Maximum supply voltages vary: LM2902MT/NOPB and LM224DTBR2G support 32V; LM224PT supports 30V; BA2902FV-E2 supports 32V; MC33174DTBR2G supports 44V. Verify application supply voltage requirements against each substitute's maximum rating.

Q6: Are all substitutes ROHS3 compliant?

Yes. All substitute parts listed are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original LM2902KDBR compliance status.

Q7: Which substitute has the lowest power consumption?

BA2902FV-E2 (Rohm Semiconductor) has the lowest total supply current at 700µA across all four channels. The original LM2902KDBR draws 1.4mA. This 50% reduction is significant for battery-powered or power-constrained applications.

Q8: Can I use LM224DTBR2G in applications requiring -40°C operation?

LM224DTBR2G operates from -25°C to 85°C, not -40°C. Applications requiring -40°C minimum temperature must use LM224PT, LM2902DTBR2G, BA2902FV-E2, or MC33174DTBR2G.

Q9: What is the difference between LM2902MT/NOPB and LM2902MTX/NOPB?

Both parts are electrically identical with identical specifications. The primary difference is packaging: LM2902MT/NOPB is supplied in Tube packaging, while LM2902MTX/NOPB is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes.

Q10: Which substitute offers the highest output current per channel?

LM224DTBR2G, LM224PT, and LM2902DTBR2G all provide 40mA per channel output current, compared to 30mA on the original LM2902KDBR. MC33174DTBR2G provides 27mA per channel. For applications requiring maximum output current, select from the first three options.