LM339N Equivalent & Substitute Parts

Part Overview

The LM339N is a general-purpose comparator IC with four independent comparators in a 14-pin DIP package. The onsemi LM339N variant listed here is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. Substitute parts maintain functional compatibility through matching electrical specifications and package form factors while offering improved availability and product status.

Substiute Parts

LM339N

onsemiIn Stock: 124858LM339N Datasheet

Current PartRFQ

LM339DR2G

onsemiIn Stock: 205270LM339DR2G Datasheet

SimilarRFQ

LM339N

STMicroelectronicsIn Stock: 124922LM339N Datasheet

DirectRFQ

LM339N/NOPB

Texas InstrumentsIn Stock: 3087LM339N/NOPB Datasheet

DirectRFQ

LM339AN

Harris CorporationIn Stock: 15713LM339AN Datasheet

SimilarRFQ

LM339DR

Rohm SemiconductorIn Stock: 125221LM339DR Datasheet

SimilarRFQ

LM339NE3

Texas InstrumentsIn Stock: 18050LM339NE3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM339N are qualified based on the following criteria:

Electrical Compatibility:

• Four independent comparators (Number of Elements = 4)
• Open-Collector output type (primary output configuration)
• Supply voltage range encompassing 2V ~ 36V, ±1V ~ 18V
• Input offset voltage maximum of 5mV @ 5V or better
• Input bias current maximum of 0.25µA @ 5V or better
• Output current capability of 16mA ~ 20mA @ 5V
• Quiescent current maximum of 2.5mA
• Operating temperature range 0°C ~ 70°C or extended

Package Compatibility:

• 14-pin DIP package (through-hole mounting) for direct pin-compatible replacement
• 14-pin SOIC package (surface-mount alternative) for functional equivalence with different mounting technology

Regulatory & Compliance:

• REACH Unaffected status
• RoHS3 Compliance preferred for new designs
• MSL rating of 1 (Unlimited) or equivalent

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole Mounting (Direct Pin-Compatible Replacement):

LM339N/NOPB (Texas Instruments) is the primary recommended substitute. It maintains 14-DIP package compatibility, offers active product status with ROHS3 compliance, and extends the operating temperature range to -25°C ~ 85°C. Supply voltage range and electrical specifications match the original LM339N.

LM339NE3 (Texas Instruments) provides an alternative through-hole option with active status and ROHS3 compliance. Operating temperature range is standard (0°C ~ 70°C), and output current capability is slightly higher at 20mA typical.

LM339N (STMicroelectronics) maintains 14-DIP package compatibility but carries obsolete product status. Use only when new-production alternatives are unavailable.

LM339AN (Harris Corporation) is obsolete and RoHS non-compliant. Not recommended for new designs.

For Surface-Mount Mounting (Functional Equivalent):

LM339DR2G (onsemi) provides active product status with ROHS3 compliance in 14-SOIC package. Minimum supply voltage is 3V (versus 2V for the original), which may affect low-voltage applications. This part is suitable for new designs requiring surface-mount technology.

LM339DR (Rohm Semiconductor) is obsolete but offers ROHS3 compliance in 14-SOIC package. Input offset voltage is 7mV maximum, slightly higher than the 5mV specification of the original part.

Compliance Considerations:

For new designs, prioritize parts with active product status and ROHS3 compliance: LM339N/NOPB, LM339NE3, or LM339DR2G. Obsolete parts should be used only for legacy system maintenance or when inventory constraints require it.

Frequently Asked Questions (FAQ)

Q: Can I use LM339DR2G as a direct replacement for LM339N?

A: LM339DR2G is functionally equivalent but not pin-compatible. It uses 14-SOIC surface-mount packaging instead of 14-DIP through-hole. Electrical specifications are compatible, but PCB layout and soldering methods differ. Use LM339DR2G only if your design supports surface-mount components.

Q: What is the minimum supply voltage difference between LM339N and LM339DR2G?

A: LM339N operates from 2V minimum supply voltage, while LM339DR2G operates from 3V minimum. Applications requiring 2V ~ 3V operation cannot use LM339DR2G as a substitute.

Q: Why is LM339N/NOPB recommended over LM339NE3?

A: Both are active, ROHS3-compliant through-hole alternatives. LM339N/NOPB offers extended operating temperature range (-25°C ~ 85°C) compared to LM339NE3 (0°C ~ 70°C), providing better performance in temperature-extreme environments. LM339NE3 offers slightly higher output current (20mA typical). Select based on temperature requirements.

Q: Can I use LM339AN for new production?

A: No. LM339AN is obsolete and RoHS non-compliant. It is unsuitable for new designs and should be used only for legacy system repairs when no other option exists.

Q: What is the difference between LM339N from onsemi and LM339N from STMicroelectronics?

A: Both are 14-DIP through-hole packages with four comparators. The STMicroelectronics version supports a broader output type range (CMOS, DTL, ECL, MOS, Open-Collector, TTL) but is obsolete. The onsemi version is also obsolete. For new designs, use LM339N/NOPB (Texas Instruments) or LM339NE3 (Texas Instruments), both active and compliant.

Q: Are all substitute parts pin-compatible with the original LM339N?

A: Pin compatibility depends on package type. All 14-DIP variants (LM339N/NOPB, LM339NE3, LM339N from STMicroelectronics, LM339AN) are pin-compatible. The 14-SOIC variants (LM339DR2G, LM339DR) are not pin-compatible due to different package geometry and pin spacing.

Q: Which substitute part has the best input offset voltage specification?

A: LM339AN specifies 2mV maximum input offset voltage @ 30V, the lowest among all listed parts. However, LM339AN is obsolete and RoHS non-compliant. Among active, compliant alternatives, all specify 5mV maximum input offset voltage @ 5V or better.