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LM339M Equivalent & Substitute Parts
Part Overview
The LM339M is a general-purpose comparator IC manufactured by onsemi, featuring four independent comparators in a 14-SOP package. The device supports DTL, MOS, Open-Collector, and TTL output configurations with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The LM339M is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility while offering improved availability and active product status.
Substiute Parts
Key Parameters
| Parameter | LM339M Value |
|---|---|
| Number of Elements | 4 |
| Output Type | DTL, MOS, Open-Collector, TTL |
| Voltage - Supply, Single/Dual (±) | 2V ~ 36V, ±1V ~ 18V |
| Voltage - Input Offset (Max) | 5mV @ 5V |
| Current - Input Bias (Max) | 0.25µA @ 5V |
| Current - Output (Typ) | 18mA @ 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 |
Substitute Part Grouping Explanation
Substitution eligibility for the LM339M is determined by the following critical parameters:
- Number of Elements: Must be 4 independent comparators
- Package / Case: Must be 14-SOIC with 0.154" (3.90mm) width for direct PCB compatibility
- Mounting Type: Surface Mount required
- Voltage - Supply Range: Must support minimum 2V to 36V (single) or equivalent dual supply range
- Output Type: Must include Open-Collector capability for TTL/DTL compatibility
- Current - Output (Typ): Must support minimum 16mA at 5V
- Current - Input Bias (Max): Must not exceed 0.25µA @ 5V
- Operating Temperature: Extended range preferred but 0°C ~ 70°C minimum acceptable
Direct substitutes maintain identical electrical and mechanical specifications. Similar substitutes meet all critical parameters but may have enhanced performance characteristics (lower offset voltage, extended temperature range, improved quiescent current) or different product status.
Parameter Comparison
| Parameter | LM339M (onsemi) | LM339DR2G (onsemi) | LM339D (STMicroelectronics) | AS339AMTR-E1 (Diodes) | AS339MTR-E1 (Diodes) | BA2901SF-E2 (Rohm) | LM139AD (TI) | LM139ADT (STMicroelectronics) | LM139DT (STMicroelectronics) | LM239ADT (STMicroelectronics) | LM239DT (STMicroelectronics) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Elements | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | DTL, MOS, Open-Collector, TTL | CMOS, Open-Collector, TTL | CMOS, DTL, ECL, MOS, Open-Collector, TTL | Open-Collector | Open-Collector | Open-Collector | Open-Collector, Open-Drain | Open-Collector, Open-Drain | Open-Collector, Open-Drain | CMOS, DTL, ECL, MOS, Open-Collector, TTL | CMOS, DTL, ECL, MOS, Open-Collector, TTL |
| Voltage - Supply, Single/Dual (±) | 2V ~ 36V, ±1V ~ 18V | 3V ~ 36V, ±1.5V ~ 18V | 2V ~ 32V, ±1V ~ 16V | 2V ~ 36V, ±1V ~ 18V | 2V ~ 36V, ±1V ~ 18V | 2V ~ 36V, ±1V ~ 18V | 2V ~ 30V, ±1V ~ 15V | 2V ~ 32V, ±1V ~ 16V | 2V ~ 32V, ±1V ~ 16V | 2V ~ 32V, ±1V ~ 16V | 2V ~ 32V, ±1V ~ 16V |
| Voltage - Input Offset (Max) | 5mV @ 5V | 5mV @ 5V | 5mV @ 30V | 3mV @ 5V | 5mV @ 5V | 7mV @ 5V | 2mV @ 30V | 2mV @ 30V | 5mV @ 30V | 2mV @ 30V | 5mV @ 30V |
| Current - Input Bias (Max) | 0.25µA @ 5V | 0.25µA @ 5V | 0.25µA @ 5V | 0.25µA @ 5V | 0.25µA @ 5V | 0.25µA @ 5V | 0.1µA @ 5V | 0.1µA @ 5V | 0.25µA @ 5V | 0.1µA @ 5V | 0.25µA @ 5V |
| Current - Output (Typ) | 18mA @ 5V | 16mA @ 5V | 16mA @ 5V | 16mA @ 5V | 16mA @ 5V | 16mA @ 5V | 20mA | 16mA @ 5V | 16mA @ 5V | 16mA @ 5V | 16mA @ 5V |
| Current - Quiescent (Max) | 2.5mA | 2.5mA | 2.5mA | 2mA | 2mA | 2mA | 2mA | 2mA | 2mA | 2mA | 2mA |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 105°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -40°C ~ 105°C | -40°C ~ 105°C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.173", 4.40mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Last Time Buy | Active | Active | Active | Active |
| RoHS Status | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Substitutes (Highest Compatibility)
LM339DR2G (onsemi) is the primary direct substitute for LM339M. Both devices share identical electrical specifications, operating temperature range (0°C ~ 70°C), and 14-SOIC package dimensions. LM339DR2G is currently in active production status with ROHS3 compliance, making it suitable for new designs and production continuity.
Compatible Alternatives (Active Status)
LM339D (STMicroelectronics) provides full functional compatibility with minor parameter variations. Supply voltage range is slightly reduced (2V ~ 32V single, ±1V ~ 16V dual) compared to LM339M (2V ~ 36V single, ±1V ~ 18V dual). This device is actively produced and ROHS3 compliant.
LM239ADT and LM239DT (STMicroelectronics) are functionally equivalent with extended output type support (CMOS, DTL, ECL, MOS, Open-Collector, TTL). Both operate at 2V ~ 32V single supply and maintain identical quiescent current specifications. LM239ADT offers enhanced input bias current performance (0.1µA @ 5V) and extended temperature range (-40°C ~ 105°C). Both are actively produced and ROHS3 compliant.
Extended Temperature Range Options
AS339AMTR-E1 and AS339MTR-E1 (Diodes Incorporated) support extended operating temperature range (-40°C ~ 85°C) while maintaining full electrical compatibility. Both devices are actively produced with ROHS3 compliance. AS339AMTR-E1 offers superior input offset voltage specification (3mV @ 5V).
BA2901SF-E2 (Rohm Semiconductor) provides the widest operating temperature range (-40°C ~ 105°C) with full functional compatibility. Package width is slightly larger (0.173" vs 0.154"), requiring PCB layout verification. Device is actively produced and ROHS3 compliant.
LM139AD, LM139ADT, and LM139DT (Texas Instruments and STMicroelectronics) offer enhanced performance with lower input offset voltage (2mV @ 30V) and reduced input bias current (0.1µA @ 5V). LM139AD is Last Time Buy status. LM139ADT and LM139DT are actively produced with extended temperature range support (-55°C ~ 125°C) and ROHS3 compliance.
Compliance and Certification
All recommended substitutes maintain REACH Unaffected status and EAR99 export classification consistent with LM339M. All active-status alternatives are ROHS3 compliant, supporting environmental and regulatory requirements for current production.
Frequently Asked Questions (FAQ)
Q: Can LM339DR2G directly replace LM339M without PCB modifications?
A: Yes. LM339DR2G maintains identical electrical specifications, operating temperature range, and 14-SOIC package footprint (0.154", 3.90mm width). No PCB layout changes are required for direct substitution.
Q: What is the primary reason to substitute LM339M?
A: LM339M is classified as obsolete. LM339DR2G, LM239ADT, LM239DT, and other active-status alternatives ensure long-term supply availability and production continuity.
Q: Are there supply voltage limitations when substituting LM339M?
A: Most substitutes support the full 2V ~ 36V single supply range of LM339M. LM339D, LM139ADT, LM139DT, LM239ADT, and LM239DT have reduced maximum single supply voltage (32V). Verify application requirements before selection.
Q: Which substitute offers the best performance specifications?
A: LM139AD, LM139ADT, and LM139DT provide superior input offset voltage (2mV @ 30V) and input bias current (0.1µA @ 5V) compared to LM339M (5mV @ 5V, 0.25µA @ 5V). These devices are recommended for precision applications requiring tighter input specifications.
Q: Does BA2901SF-E2 require PCB layout changes?
A: BA2901SF-E2 package width is 0.173" (4.40mm) compared to LM339M standard 0.154" (3.90mm). PCB footprint verification is required before substitution. All other electrical and functional parameters are compatible.
Q: Are all substitutes ROHS3 compliant?
A: Yes. All active-status substitute parts listed are ROHS3 compliant. LM139AD (Last Time Buy status) is also ROHS3 compliant. Compliance status supports current environmental and regulatory requirements.
Q: What is the temperature range consideration for extended-range applications?
A: LM339M operates 0°C ~ 70°C. Extended-range substitutes include AS339AMTR-E1 and AS339MTR-E1 (-40°C ~ 85°C), BA2901SF-E2 (-40°C ~ 105°C), and LM139 series (-55°C ~ 125°C). Select based on application temperature requirements.
Q: Can output current specifications affect substitution decisions?
A: LM339M specifies 18mA @ 5V typical output current. Most substitutes provide 16mA @ 5V, which is acceptable for standard TTL/DTL logic interface applications. LM139AD provides 20mA output current for applications requiring higher drive capability.
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