JL139BDA Equivalent & Substitute Parts Reference

Part Overview

The JL139BDA is a low-power, low-offset voltage general-purpose comparator manufactured by Texas Instruments. This quad comparator integrates four independent comparison elements in a 14-pin CFlatPack surface-mount package. The device operates across a wide supply voltage range (5V ~ 36V single supply, ±2.5V ~ 18V dual supply) and features open-collector, CMOS, MOS, and TTL output compatibility. The JL139BDA maintains Active product status with 912 units in current inventory stock.

Substitute parts are necessary when the 14-CFlatPack package is unavailable, when alternative supply voltage ranges are required, or when different operating temperature specifications better match application requirements. Equivalent devices maintain the same functional performance while offering different packaging options, inventory availability, or thermal operating ranges.

Substiute Parts

JL139BDA

Texas InstrumentsIn Stock: 970JL139BDA Datasheet

Current PartRFQ

LM139DT

STMicroelectronicsIn Stock: 18364LM139DT Datasheet

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LM239DR2G

onsemiIn Stock: 105414LM239DR2G Datasheet

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LM2901DR2G

onsemiIn Stock: 127372LM2901DR2G Datasheet

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LM339D

STMicroelectronicsIn Stock: 7047LM339D Datasheet

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LM339DT

STMicroelectronicsIn Stock: 445298LM339DT Datasheet

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LM339EDR2G

onsemiIn Stock: 5116LM339EDR2G Datasheet

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LM339QT

STMicroelectronicsIn Stock: 5820LM339QT Datasheet

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MAX516BCWG+

Analog Devices Inc./Maxim IntegratedIn Stock: 906MAX516BCWG+ Datasheet

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NCV2901DTBR2G

onsemiIn Stock: 35182NCV2901DTBR2G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the JL139BDA is determined by the following critical parameters:

Functional Equivalence Criteria:

• Four independent comparator elements (quad configuration)
• Open-collector output stage with CMOS, MOS, TTL compatibility
• Input offset voltage specification of 5mV or lower
• Input bias current specification of 0.25µA or lower
• Quiescent current specification of 3mA or lower

Supply Voltage Compatibility: Substitute parts must support the minimum single-supply voltage of 5V and minimum dual-supply voltage of ±2.5V. Parts with extended upper voltage limits (up to 36V single, ±18V dual) provide broader application flexibility.

Operating Temperature Range: The JL139BDA operates from -55°C to 125°C. Substitute parts with narrower temperature ranges (0°C ~ 70°C or -25°C ~ 85°C) are suitable only for applications within those restricted limits. Parts with extended ranges (-40°C ~ 105°C or -40°C ~ 125°C) provide superior thermal coverage.

Package Considerations: The original 14-CFlatPack package is surface-mount. Substitute parts are grouped by alternative surface-mount packages: 14-SOIC, 14-TSSOP, and 16-QFN. Each package maintains the same pin count or functional equivalent pinout.

Compliance and Certification: All listed substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and storage requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LM339DT (STMicroelectronics) and LM339D (STMicroelectronics) are the closest functional equivalents. Both maintain the same input offset voltage specification (5mV @ 30V), identical operating temperature range (-55°C ~ 125°C for LM139DT; 0°C ~ 70°C for LM339D and LM339DT), and quad comparator configuration. LM339DT offers superior inventory availability (445,200 units) and is packaged in 14-SOIC format with Cut Tape & Digi-Reel packaging. These parts are suitable for direct replacement in applications where the 14-CFlatPack package can be adapted to 14-SOIC footprint.

Extended Supply Voltage Substitutes:

LM239DR2G and LM2901DR2G (both onsemi) support the full upper supply voltage range (3V ~ 36V single, ±1.5V ~ 18V dual) matching the JL139BDA. LM239DR2G maintains 5mV input offset voltage specification, while LM2901DR2G specifies 7mV. Both are packaged in 14-SOIC format with extensive inventory (105,400 and 127,336 units respectively). Operating temperature ranges are restricted to -25°C ~ 85°C and -40°C ~ 105°C respectively, limiting use in extreme cold environments below -25°C.

Automotive-Grade Substitute:

NCV2901DTBR2G (onsemi) is qualified to AEC-Q100 automotive standards and operates across -40°C ~ 125°C, matching the JL139BDA thermal range. This part is packaged in 14-TSSOP format with 35,100 units in inventory. Input offset voltage is specified at 7mV @ 5V. This device is appropriate for automotive and industrial applications requiring extended temperature operation and automotive qualification.

Compact Package Alternative:

LM339QT (STMicroelectronics) offers a 16-VFQFN (3x3) package with exposed pad, providing a smaller footprint than the original 14-CFlatPack. This part supports extended supply voltage range (2V ~ 36V single, ±1V ~ 18V dual) and maintains quad comparator configuration. Inventory availability is 5,783 units. Operating temperature specification is not provided in the datasheet parameters.

Selection Criteria by Application:

• Standard industrial applications with -55°C ~ 125°C requirement: LM139DT (STMicroelectronics)
• High-volume production with extended supply voltage: LM239DR2G or LM2901DR2G (onsemi)
• Automotive and harsh environment applications: NCV2901DTBR2G (onsemi)
• Space-constrained PCB designs: LM339QT (STMicroelectronics)
• Maximum inventory availability: LM339DT (STMicroelectronics, 445,200 units)

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing processes and storage requirements.

Frequently Asked Questions (FAQ)

Q1: Can LM339DT directly replace JL139BDA without PCB layout changes?

A: LM339DT is functionally equivalent but uses a different package. The JL139BDA is packaged in 14-CFlatPack while LM339DT uses 14-SOIC. Both are 14-pin surface-mount packages with identical pin assignments for the comparator function. PCB footprint modification is required, but the electrical interface remains unchanged. Verify footprint compatibility with your PCB design software before implementation.

Q2: What is the key difference between LM239DR2G and LM2901DR2G?

A: Both parts are quad comparators in 14-SOIC packages with identical supply voltage ranges (3V ~ 36V single, ±1.5V ~ 18V dual). The primary difference is input offset voltage specification: LM239DR2G specifies 5mV @ 5V while LM2901DR2G specifies 7mV @ 5V. For applications requiring tighter input accuracy, LM239DR2G is preferred. Operating temperature ranges also differ: LM239DR2G operates -25°C ~ 85°C while LM2901DR2G operates -40°C ~ 105°C. Select based on your specific temperature and accuracy requirements.

Q3: Is NCV2901DTBR2G suitable for non-automotive applications?

A: Yes. NCV2901DTBR2G is AEC-Q100 qualified for automotive use, but this qualification does not restrict its use in non-automotive applications. The part offers superior thermal performance (-40°C ~ 125°C operating range) compared to standard industrial grades, making it valuable for any application requiring extended temperature operation. The 14-TSSOP package is slightly larger than 14-SOIC but provides equivalent electrical performance.

Q4: Why does LM339QT have a 16-pin package when the original is 14-pin?

A: LM339QT uses a 16-VFQFN (3x3) package with an exposed thermal pad. The two additional pins are typically ground connections or no-connect pads. The 16-QFN package provides superior thermal dissipation through the exposed pad compared to traditional 14-pin packages. Pin-to-pin compatibility must be verified against your specific application schematic, as the pinout differs from the 14-pin configuration.

Q5: What is the minimum supply voltage for each substitute part?

A: JL139BDA minimum is 5V single supply or ±2.5V dual supply. Substitutes vary: LM139DT and LM339D/DT minimum is 2V single or ±1V dual; LM239DR2G and LM2901DR2G minimum is 3V single or ±1.5V dual; LM339EDR2G minimum is 3V single or ±1.5V dual; LM339QT minimum is 2V single or ±1V dual; NCV2901DTBR2G minimum is 3V single or ±1.5V dual. For applications operating below 3V single supply, only LM139DT, LM339D, LM339DT, or LM339QT are suitable.

Q6: Which substitute offers the best inventory availability?

A: LM339DT (STMicroelectronics) provides the highest inventory with 445,200 units in stock. This part is packaged in 14-SOIC format with Cut Tape & Digi-Reel packaging, supporting high-volume production requirements. LM2901DR2G (127,336 units) and LM239DR2G (105,400 units) also offer substantial inventory for immediate availability.

Q7: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. This ensures compatibility with modern manufacturing processes, environmental regulations, and storage requirements without special handling procedures.

Q8: What is the operating temperature limitation for LM339D and LM339DT?

A: Both LM339D and LM339DT operate within 0°C ~ 70°C temperature range, which is narrower than the JL139BDA specification of -55°C ~ 125°C. These parts are unsuitable for applications requiring operation below 0°C or above 70°C. For extended temperature applications, select LM139DT (-55°C ~ 125°C), LM2901DR2G (-40°C ~ 105°C), or NCV2901DTBR2G (-40°C ~ 125°C).

Q9: Can I use LM339EDR2G as a direct substitute?

A: LM339EDR2G is functionally compatible but has restricted operating temperature (0°C ~ 70°C) compared to JL139BDA (-55°C ~ 125°C). The part is packaged in 14-SOIC format with Tape & Reel packaging and offers lower inventory (5,100 units). Input offset voltage is specified at 5mV @ 5V. This part is suitable only for applications within the 0°C ~ 70°C temperature window.

Q10: What packaging options are available for JL139BDA substitutes?

A: Substitute parts are available in four surface-mount package formats: 14-SOIC (0.154" width) used by LM139DT, LM239DR2G, LM2901DR2G, LM339D, LM339DT, and LM339EDR2G; 14-TSSOP (0.173" width) used by NCV2901DTBR2G; and 16-VFQFN (3x3) used by LM339QT. All packages maintain surface-mount assembly compatibility. Select based on PCB footprint availability and thermal dissipation requirements.