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LM339M Equivalent & Substitute Parts
Part Overview
The LM339M is a general-purpose quad comparator IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This device features open-collector outputs and operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). The LM339M is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional compatibility through matching electrical characteristics, package form factor, and output configuration while meeting current availability and compliance requirements.
Substiute Parts
Key Parameters
| Parameter | LM339M Value | Unit |
|---|---|---|
| Number of Elements | 4 | — |
| Output Type | Open-Collector | — |
| Voltage - Supply, Single/Dual (±) | 2V ~ 36V, ±1V ~ 18V | — |
| Voltage - Input Offset (Max) | 5mV @ 30V | — |
| Current - Input Bias (Max) | 0.25µA @ 5V | — |
| Current - Output (Typ) | 16mA @ 5V | — |
| Current - Quiescent (Max) | 2.5mA | — |
| Operating Temperature | 0°C ~ 70°C | — |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitute parts for the LM339M are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:
- Number of Elements: Must be 4 (quad comparator configuration)
- Output Type: Must be Open-Collector or compatible multi-output type
- Supply Voltage Range: Must support at minimum 2V ~ 36V single supply or equivalent dual supply range
- Package / Case: Must be 14-SOIC (0.154", 3.90mm Width) or mechanically compatible 14-pin SOIC variant
- Mounting Type: Surface Mount
- Input Offset Voltage: Maximum 7mV @ 5V (within acceptable tolerance band)
- Input Bias Current: Maximum 0.25µA @ 5V
- Output Current: Minimum 16mA @ 5V
- Quiescent Current: Maximum 2.5mA
- Compliance: ROHS3 Compliant, REACH Unaffected
Substitute parts are grouped by manufacturer and product status (Active vs. Obsolete). All listed substitutes maintain the core functional parameters required for direct replacement in existing designs.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Supply Voltage | Input Offset (Max) | Input Bias (Max) | Output Current (Typ) | Quiescent (Max) | Operating Temp | Package |
|---|---|---|---|---|---|---|---|---|---|
| LM339M | Texas Instruments | Obsolete | 2V ~ 36V, ±1V ~ 18V | 5mV @ 30V | 0.25µA @ 5V | 16mA @ 5V | 2.5mA | 0°C ~ 70°C | 14-SOIC |
| LM339M/NOPB | Texas Instruments | Active | 2V ~ 36V, ±1V ~ 18V | 5mV @ 30V | 0.25µA @ 5V | 16mA @ 5V | 2.5mA | 0°C ~ 70°C | 14-SOIC |
| AS339AMTR-E1 | Diodes Incorporated | Active | 2V ~ 36V, ±1V ~ 18V | 3mV @ 5V | 0.25µA @ 5V | 16mA @ 5V | 2mA | -40°C ~ 85°C | 14-SOIC |
| AS339MTR-E1 | Diodes Incorporated | Active | 2V ~ 36V, ±1V ~ 18V | 5mV @ 5V | 0.25µA @ 5V | 16mA @ 5V | 2mA | -40°C ~ 85°C | 14-SOIC |
| AS339MTR-G1 | Diodes Incorporated | Active | 2V ~ 36V, ±1V ~ 18V | 5mV @ 5V | 0.25µA @ 5V | 16mA | 2mA | -40°C ~ 85°C | 14-SOIC |
| BA2901SF-E2 | Rohm Semiconductor | Active | 2V ~ 36V, ±1V ~ 18V | 7mV @ 5V | 0.25µA @ 5V | 16mA @ 5V | 2mA | -40°C ~ 105°C | 14-SOP |
| LM139ADT | STMicroelectronics | Active | 2V ~ 32V, ±1V ~ 16V | 2mV @ 30V | 0.1µA @ 5V | 16mA @ 5V | 2mA | -55°C ~ 125°C | 14-SOIC |
| LM139DT | STMicroelectronics | Active | 2V ~ 32V, ±1V ~ 16V | 5mV @ 30V | 0.25µA @ 5V | 16mA @ 5V | 2mA | -55°C ~ 125°C | 14-SOIC |
| LM239ADT | STMicroelectronics | Active | 2V ~ 32V, ±1V ~ 16V | 2mV @ 30V | 0.1µA @ 5V | 16mA @ 5V | 2mA | -40°C ~ 105°C | 14-SOIC |
| LM239DR2G | onsemi | Active | 3V ~ 36V, ±1.5V ~ 18V | 5mV @ 5V | 0.25µA @ 5V | 16mA @ 5V | 2.5mA | -25°C ~ 85°C | 14-SOIC |
| LM239DT | STMicroelectronics | Active | 2V ~ 32V, ±1V ~ 16V | 5mV @ 30V | 0.25µA @ 5V | 16mA @ 5V | 2mA | -40°C ~ 105°C | 14-SOIC |
Engineering Selection Recommendations
Direct Replacement (Highest Compatibility)
LM339M/NOPB is the primary direct substitute. Manufactured by Texas Instruments with identical electrical specifications and package configuration, this part maintains full compatibility with existing designs. Product status is Active, ensuring long-term availability and supply chain stability.
Tier 1 Substitutes (Full Parameter Match)
AS339AMTR-E1, AS339MTR-E1, and AS339MTR-G1 (Diodes Incorporated) provide equivalent functionality with improved specifications in certain parameters. These parts maintain the 2V ~ 36V supply range, 14-SOIC package, and open-collector output configuration. Operating temperature range extends to -40°C ~ 85°C, supporting broader environmental applications. Quiescent current is reduced to 2mA, offering improved power efficiency. All three variants are Active products with ROHS3 compliance and REACH Unaffected status.
Tier 2 Substitutes (Voltage Range Limitation)
LM139ADT, LM139DT, LM239ADT, and LM239DT (STMicroelectronics) provide functional equivalence with reduced maximum supply voltage (2V ~ 32V single supply vs. 2V ~ 36V). These parts are suitable for applications operating within the 2V ~ 32V range. LM139ADT and LM239ADT offer superior input offset voltage (2mV @ 30V) and reduced input bias current (0.1µA @ 5V). Operating temperature range extends to -55°C ~ 125°C (LM139 series) or -40°C ~ 105°C (LM239 series). All are Active products with ROHS3 compliance.
Tier 3 Substitute (Voltage Range Limitation)
LM239DR2G (onsemi) operates within 3V ~ 36V supply range, requiring minimum 3V supply voltage. This part is suitable for applications with 3V minimum supply requirement. Quiescent current matches the original specification at 2.5mA. Product status is Active with ROHS3 compliance.
Package Variant
BA2901SF-E2 (Rohm Semiconductor) is functionally equivalent but uses 14-SOP package (0.173", 4.40mm Width) instead of standard 14-SOIC. This variant is suitable only for designs with compatible PCB footprints. Operating temperature range extends to -40°C ~ 105°C. Input offset voltage is 7mV @ 5V, within acceptable tolerance. Product status is Active with ROHS3 compliance.
All substitute parts maintain ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution.
Frequently Asked Questions (FAQ)
Q: Can LM339M/NOPB be used as a direct replacement for LM339M?
A: Yes. LM339M/NOPB is manufactured by Texas Instruments with identical electrical specifications, package configuration, and output type. The primary difference is product status: LM339M is obsolete while LM339M/NOPB is Active. This part is the recommended direct substitute.
Q: What is the key difference between Diodes Incorporated AS339 variants?
A: AS339AMTR-E1 is supplied in Tape & Reel (TR) packaging, AS339MTR-E1 in Cut Tape (CT) & Digi-Reel, and AS339MTR-G1 in Tape & Reel. All three maintain identical electrical specifications. Packaging selection depends on procurement and assembly requirements. Moisture Sensitivity Level (MSL) differs: AS339AMTR-E1 is MSL 1 (Unlimited), while AS339MTR-E1 and AS339MTR-G1 are MSL 3 (168 Hours).
Q: Can I use LM139DT or LM239DT if my circuit operates at 36V supply?
A: No. LM139DT and LM239DT are rated for maximum 32V supply voltage. Use only if your circuit operates within 2V ~ 32V range. For 36V operation, select AS339 variants, LM239DR2G, or LM339M/NOPB.
Q: What is the difference between LM139 and LM239 series?
A: Both are quad comparators with similar electrical characteristics. LM139ADT and LM139DT operate from -55°C to 125°C (LM139ADT) or -55°C to 125°C (LM139DT). LM239ADT and LM239DT operate from -40°C to 105°C. Selection depends on required operating temperature range. LM139 series supports wider temperature extremes.
Q: Is BA2901SF-E2 compatible with existing LM339M PCB layouts?
A: BA2901SF-E2 uses 14-SOP package (0.173", 4.40mm Width) versus standard 14-SOIC (0.154", 3.90mm Width). Package footprints are not identical. Use only if PCB layout accommodates 14-SOP package or if layout modification is acceptable.
Q: What is the supply voltage range for LM239DR2G?
A: LM239DR2G operates from 3V ~ 36V (single supply) or ±1.5V ~ 18V (dual supply). Minimum supply voltage is 3V, compared to 2V for most other substitutes. Verify your circuit can operate with 3V minimum supply before selecting this part.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for hazardous substance restrictions and chemical safety.
Q: Which substitute offers the best input offset voltage specification?
A: LM139ADT and LM239ADT offer the lowest input offset voltage at 2mV @ 30V, compared to 5mV @ 30V for the original LM339M. This provides improved accuracy for precision comparison applications.
Q: Can I mix different substitute parts in the same design?
A: Yes, provided all parts meet the electrical requirements of your specific circuit. However, maintaining consistent part selection across production batches is recommended for supply chain stability and quality control.
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