LM139AWGRLQMLV Equivalent & Substitute Parts

Part Overview

The LM139AWGRLQMLV is a low-power, low-offset voltage general-purpose comparator manufactured by Texas Instruments. This quad comparator features open-collector/open-drain output configuration and operates across a wide supply voltage range of 5V ~ 30V (single supply) or ±2.5V ~ 15V (dual supply). The device is housed in a 14-CSOIC surface-mount package and maintains active product status with 636 units in current inventory.

Substitute parts are necessary when the original component becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for functionally equivalent alternatives that offer improved availability or cost optimization.

Substiute Parts

LM139AWGRLQMLV

Texas InstrumentsIn Stock: 706LM139AWGRLQMLV Datasheet

Current PartRFQ

LM239APT

STMicroelectronicsIn Stock: 1402LM239APT Datasheet

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LM239DTBR2G

onsemiIn Stock: 6636LM239DTBR2G Datasheet

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LM2901HYDT

STMicroelectronicsIn Stock: 4399LM2901HYDT Datasheet

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LM2901VDTBR2G

onsemiIn Stock: 5471LM2901VDTBR2G Datasheet

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LM339D

STMicroelectronicsIn Stock: 7047LM339D Datasheet

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LM339DT

STMicroelectronicsIn Stock: 445298LM339DT Datasheet

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MAX516AEWG+

Analog Devices Inc./Maxim IntegratedIn Stock: 17450MAX516AEWG+ Datasheet

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MC3302DR2G

onsemiIn Stock: 3346MC3302DR2G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the LM139AWGRLQMLV is determined by the following critical parameters:

Primary Compatibility Criteria:

• Number of elements: Must be 4 (quad configuration)
• Output type: Must include Open-Collector or Open-Drain capability
• Supply voltage range: Must encompass or exceed 5V ~ 30V (single) or ±2.5V ~ 15V (dual)
• Package type: Surface-mount packages (SOIC, TSSOP, CSOIC variants)
• RoHS compliance: ROHS3 Compliant status required

Secondary Compatibility Factors:

• Input offset voltage: Lower or equal values preferred
• Input bias current: Lower values indicate improved performance
• Operating temperature range: Must support -55°C ~ 125°C or subset thereof
• Quiescent current: Should not exceed 2.5mA for low-power applications

The substitute parts identified fall into two functional groups based on package format and electrical performance characteristics:

Group 1 - TSSOP Package Variants (14-TSSOP): LM239APT, LM239DTBR2G, LM2901VDTBR2G Group 2 - SOIC Package Variants (14-SOIC): LM2901HYDT, LM339D, LM339DT, MC3302DR2G Group 3 - Alternative Package (24-SOIC): MAX516AEWG+

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes (Highest Compatibility):

1. LM239APT (STMicroelectronics) - Functionally equivalent with identical input offset voltage specification (2mV @ 30V). Offers superior input bias current performance (0.1µA vs 1000pA). Package format change from 14-CSOIC to 14-TSSOP requires PCB layout modification. Operating temperature range reduced to -40°C ~ 105°C. ROHS3 compliant with MSL 1 rating. Inventory: 1345 units.

2. LM2901VDTBR2G (onsemi) - Maintains extended operating temperature range (-40°C ~ 125°C) matching original specification. Supply voltage range expanded to 3V ~ 36V. Package format 14-TSSOP. Input offset voltage 7mV @ 5V represents acceptable deviation. ROHS3 compliant with MSL 1 rating. Inventory: 5380 units.

3. LM339DT (STMicroelectronics) - Highest inventory availability (445200 units). Functionally compatible with input offset voltage 5mV @ 30V. Package format 14-SOIC. Operating temperature range 0°C ~ 70°C represents limitation for extended temperature applications. ROHS3 compliant with MSL 1 rating.

Secondary Substitutes (Conditional Compatibility):

4. LM239DTBR2G (onsemi) - Supply voltage range 3V ~ 36V exceeds original specification. Input offset voltage 5mV @ 5V acceptable for general-purpose applications. Operating temperature range -25°C ~ 85°C suitable for commercial/industrial environments. ROHS3 compliant. Inventory: 6540 units.

5. LM2901HYDT (STMicroelectronics) - Automotive-grade component with AEC-Q100 qualification. Supply voltage range 2V ~ 36V. MSL 3 rating requires controlled moisture exposure during storage and handling. Operating temperature range not specified in provided data. Inventory: 4310 units.

6. LM339D (STMicroelectronics) - Functionally compatible with input offset voltage 5mV @ 30V. Operating temperature range 0°C ~ 70°C limits use in extended temperature applications. ROHS3 compliant. Inventory: 7032 units.

7. MC3302DR2G (onsemi) - Input offset voltage 20mV @ 5V represents significant deviation from original 2mV specification. Suitable only for applications with relaxed precision requirements. Supply voltage range 3V ~ 30V matches original single-supply specification. ROHS3 compliant. Inventory: 3313 units.

Not Recommended:

MAX516AEWG+ (Analog Devices Inc./Maxim Integrated) - Package format 24-SOIC represents substantial physical incompatibility. Supply voltage range 4.75V ~ 16.5V does not encompass full original specification range. Quiescent current 10mA exceeds original 2mA specification by 5x, unsuitable for low-power applications.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace LM139AWGRLQMLV with LM339DT without PCB modifications?

A: LM339DT is functionally compatible but requires PCB layout evaluation. Both devices use 14-pin SOIC packages with identical pin assignments for quad comparator configuration. However, LM339DT operates at 0°C ~ 70°C versus the original -55°C ~ 125°C range. If your application requires extended low-temperature operation below 0°C, LM339DT is not suitable. Verify your operating temperature requirements before substitution.

Q2: What is the primary difference between TSSOP and SOIC package variants?

A: TSSOP (Thin Shrink Small Outline Package) measures 0.173" width versus SOIC (Small Outline Integrated Circuit) at 0.154" width. TSSOP packages are narrower and require different PCB footprints. Pin pitch and spacing differ between formats. PCB redesign is necessary when switching between these package types. Verify your PCB design tools support the target package before committing to substitution.

Q3: Why does LM239APT show lower input bias current (0.1µA) compared to LM139AWGRLQMLV (1000pA)?

A: The LM239APT specification lists 0.1µA (100pA) as maximum input bias current at 5V, which is actually lower than the original 1000pA specification. This represents improved performance characteristics. Lower input bias current reduces loading on signal sources and improves circuit accuracy in high-impedance applications. This substitution offers performance enhancement rather than degradation.

Q4: Is LM2901HYDT suitable for automotive applications?

A: LM2901HYDT carries AEC-Q100 automotive qualification and is specifically designed for automotive-grade applications. However, the provided data does not specify operating temperature range for this variant. MSL 3 rating requires controlled moisture exposure (168-hour maximum at specified humidity). If your application requires automotive qualification, LM2901HYDT is appropriate, but verify operating temperature specifications with the manufacturer before final selection.

Q5: Can I use MC3302DR2G as a direct substitute despite the 20mV input offset voltage?

A: MC3302DR2G has input offset voltage of 20mV @ 5V versus the original 2mV specification—a 10x difference. This substitution is only acceptable for applications with relaxed precision requirements where input offset voltage does not significantly impact circuit performance. For precision comparator applications, precision instrumentation, or threshold detection requiring tight accuracy, MC3302DR2G is not recommended. Evaluate your circuit's offset voltage tolerance before considering this substitute.

Q6: What does MSL 3 rating mean for LM2901HYDT?

A: MSL (Moisture Sensitivity Level) 3 indicates the component can be exposed to moisture for a maximum of 168 hours at specified temperature and humidity conditions before soldering. After this exposure period, the component must be baked to remove absorbed moisture. MSL 1 components (unlimited exposure) do not require this precaution. If your manufacturing process involves extended storage or high-humidity environments, MSL 1 rated substitutes (LM239APT, LM2901VDTBR2G, LM339D, LM339DT, MC3302DR2G) are preferred over LM2901HYDT.

Q7: Why is MAX516AEWG+ not recommended as a substitute?

A: MAX516AEWG+ uses a 24-SOIC package versus the original 14-pin format, requiring complete PCB redesign. Supply voltage range 4.75V ~ 16.5V does not encompass the original 5V ~ 30V specification. Quiescent current of 10mA is 5 times higher than the original 2mA, making it unsuitable for low-power applications. These fundamental incompatibilities eliminate MAX516AEWG+ as a viable substitute.

Q8: Which substitute offers the best inventory availability?

A: LM339DT offers the highest inventory with 445200 units in stock, followed by LM239DTBR2G (6540 units) and LM2901VDTBR2G (5380 units). If supply chain continuity is critical, LM339DT provides the strongest availability position. However, verify that the operating temperature range 0°C ~ 70°C meets your application requirements before selecting based solely on inventory levels.

Q9: Do all substitute parts maintain ROHS3 compliance?

A: All identified substitute parts maintain ROHS3 compliance status. Environmental and regulatory compliance is consistent across the substitute group. No compliance degradation occurs when selecting from the recommended substitutes.

Q10: What is the significance of the 10mV hysteresis specification in LM139AWGRLQMLV?

A: The 10mV hysteresis specification indicates built-in hysteresis that prevents oscillation around the threshold voltage. This is particularly important in noisy environments or when the input signal transitions slowly near the threshold. Most substitute parts do not specify hysteresis values in the provided data. If your application depends on specific hysteresis characteristics, verify hysteresis specifications with the manufacturer for your selected substitute before final implementation.