LM139AWRLQMLV Equivalent & Substitute Parts

Part Overview

The LM139AWRLQMLV 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 to 30V (single supply) or ±2.5V to ±15V (dual supply). The device is classified as Active product status and is RoHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection.

Substitute parts are necessary when the original LM139AWRLQMLV becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design flexibility demands components from different manufacturers while maintaining functional equivalence within specified electrical parameters.

Key Parameters

Parameter	Value	Condition
Number of Elements	4	Quad comparator configuration
Output Type	Open-Collector, Open-Drain	Primary output configuration
Voltage - Supply, Single/Dual (±)	5V ~ 30V, ±2.5V ~ 15V	Operating range
Voltage - Input Offset (Max)	2mV @ 30V	Precision specification
Current - Input Bias (Max)	1000pA @ 5V	Input loading
Current - Output (Typ)	20mA	Output drive capability
Current - Quiescent (Max)	2mA	Power consumption
CMRR, PSRR (Typ)	70dB CMRR, 60dB PSRR	Signal rejection
Propagation Delay (Max)	1.3µs (Typ)	Response time
Hysteresis	10mV	Switching threshold
Operating Temperature	-55°C ~ 125°C	Temperature range
Package / Case	14-CFlatPack	Surface mount
RoHS Status	ROHS3 Compliant	Environmental compliance
MSL Rating	1 (Unlimited)	Moisture sensitivity

Substitute Part Grouping Explanation

Substitution of the LM139AWRLQMLV is determined by the following critical parameters:

Functional Equivalence Criteria:

Quad comparator configuration (4 independent comparators per package)
General-purpose comparator type
Open-collector or open-drain output capability
Supply voltage range compatibility: minimum 5V to 30V single supply or ±2.5V to ±15V dual supply
Input offset voltage specification of 5mV or better
Input bias current within 0.25µA to 1000pA range
Output current capability of 16mA or greater
Quiescent current not exceeding 2.5mA

Packaging Considerations: Substitute parts may utilize different surface-mount packages (14-TSSOP, 14-SOIC, 16-QFN) provided the pin count and functional mapping remain compatible with the application circuit.

Compliance Requirements: All substitute parts must maintain RoHS3 compliance and MSL 1 or MSL 3 ratings to ensure manufacturing process compatibility.

The following substitute parts meet these criteria and are grouped by package type and electrical performance characteristics.

Parameter Comparison

Parameter	LM139AWRLQMLV (Main)	LM239PT	LM2901DT	LM2901HYDT	LM339APT	LM339EDR2G	LM339PT
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	onsemi	STMicroelectronics
Number of Elements	4	4	4	4	4	4	4
Output Type	Open-Collector, Open-Drain	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	Not specified	CMOS, DTL, ECL, MOS, Open-Collector, TTL
Voltage - Supply, Single/Dual (±)	5V ~ 30V, ±2.5V ~ 15V	2V ~ 32V, ±1V ~ 16V	2V ~ 32V, ±1V ~ 16V	2V ~ 36V, ±1V ~ 18V	2V ~ 32V, ±1V ~ 16V	3V ~ 36V, ±1.5V ~ 18V	2V ~ 32V, ±1V ~ 16V
Voltage - Input Offset (Max)	2mV @ 30V	5mV @ 30V	7mV @ 5V	Not specified	2mV @ 30V	5mV @ 5V	5mV @ 30V
Current - Input Bias (Max)	1000pA @ 5V	0.25µA @ 5V	0.25µA @ 5V	Not specified	0.1µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Current - Output (Typ)	20mA	16mA @ 5V	16mA @ 5V	Not specified	16mA @ 5V	16mA @ 5V	16mA @ 5V
Current - Quiescent (Max)	2mA	2mA	2.5mA	2.5mA	2.5mA	2mA	2.5mA
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 125°C	Not specified	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	14-CFlatPack	14-TSSOP	14-SOIC	14-SOIC	14-TSSOP	14-SOIC	14-TSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LM339APT and LM339PT are the preferred substitutes for the LM139AWRLQMLV. Both devices maintain the critical input offset voltage specification of 2mV to 5mV, matching the precision requirements of the original part. These STMicroelectronics components are available in 14-TSSOP packaging with RoHS3 compliance and MSL 1 rating. The supply voltage range of 2V to 32V (±1V to ±16V) encompasses the original specification. However, the operating temperature range is limited to 0°C to 70°C, which is narrower than the original -55°C to 125°C range. Selection of these parts is appropriate for applications operating within the 0°C to 70°C window.

Secondary Substitutes (Extended Supply Voltage Range):

LM2901DT and LM239PT provide extended supply voltage capability (2V to 32V single supply, ±1V to ±16V dual supply) and maintain compatibility with the quad comparator configuration. LM2901DT is available in 14-SOIC packaging with operating temperature range of -40°C to 125°C, providing improved low-temperature performance compared to the LM339 variants. Input offset voltage specification of 7mV @ 5V is acceptable for general-purpose applications. RoHS3 compliance and MSL 1 rating are maintained.

Automotive-Grade Alternative:

LM2901HYDT is qualified to AEC-Q100 automotive standards with Tape & Reel packaging. This variant supports extended supply voltage range of 2V to 36V (±1V to ±18V) and maintains quiescent current specification of 2.5mA. MSL 3 rating requires controlled moisture exposure during manufacturing. This part is suitable for automotive and industrial applications requiring automotive-grade qualification.

Wide Supply Voltage Option:

LM339EDR2G from onsemi provides the widest supply voltage range of 3V to 36V (±1.5V to ±18V) among all substitutes. Available in 14-SOIC packaging with RoHS3 compliance and MSL 1 rating. Operating temperature range of 0°C to 70°C matches the LM339 variants. Input offset voltage of 5mV @ 5V and input bias current of 0.25µA @ 5V are within acceptable limits.

Compact Package Alternative:

LM2901Q4T offers a compact 16-QFN (3x3) package format with extended supply voltage range of 2V to 36V (±1V to ±18V). This option is suitable for space-constrained applications requiring surface-mount assembly. RoHS3 compliance and MSL 1 rating are maintained.

Selection Criteria Summary:

For temperature range -55°C to 125°C: LM2901DT is the only substitute maintaining full temperature coverage
For MSL 1 unlimited moisture sensitivity: All substitutes except LM2901HYDT qualify
For compact packaging: LM2901Q4T (16-QFN) provides the smallest footprint
For standard TSSOP packaging: LM339APT and LM339PT offer highest inventory availability

Frequently Asked Questions (FAQ)

Q1: Can LM339APT directly replace LM139AWRLQMLV in all applications?

LM339APT is functionally compatible with LM139AWRLQMLV for applications operating within 0°C to 70°C temperature range. The input offset voltage specification of 2mV to 5mV meets precision requirements. However, the operating temperature range is narrower than the original -55°C to 125°C specification. Verify application temperature requirements before substitution.

Q2: What is the difference between 14-TSSOP and 14-SOIC packaging?

14-TSSOP (Thin Shrink Small Outline Package) has a body width of 4.40mm, while 14-SOIC (Small Outline Integrated Circuit) has a body width of 3.90mm. Both are surface-mount packages with 14 pins. TSSOP provides slightly larger pin spacing, which may improve solderability in some manufacturing processes. SOIC offers a more compact footprint. Pin assignments and functional compatibility remain identical between these package types for the LM339 and LM2901 series.

Q3: Why does LM2901HYDT have MSL 3 rating instead of MSL 1?

LM2901HYDT is qualified to AEC-Q100 automotive standards, which requires enhanced moisture sensitivity testing. MSL 3 rating indicates the component requires controlled moisture exposure (168 hours maximum) during storage and manufacturing. This is a standard requirement for automotive-grade components. MSL 3 parts are compatible with standard manufacturing processes when proper moisture control procedures are implemented.

Q4: Is the LM2901Q4T pin-compatible with the 14-pin variants?

LM2901Q4T uses a 16-pin QFN package format, which differs from the 14-pin TSSOP and SOIC packages. While both contain four independent comparators, the pin assignments and package footprint are different. Direct socket substitution is not possible. PCB redesign is required to accommodate the 16-QFN package format.

Q5: What are the key electrical differences between LM339 and LM2901 series?

Both series are quad general-purpose comparators with similar functional specifications. LM2901 variants typically offer extended supply voltage range (up to 36V) compared to LM339 variants (up to 32V). Input offset voltage specifications are comparable (2mV to 7mV). The primary differences are in packaging options, temperature ranges, and manufacturer availability. Functional performance in typical applications is equivalent.

Q6: Can I use LM339EDR2G in a circuit designed for LM139AWRLQMLV?

LM339EDR2G is functionally compatible for applications within 0°C to 70°C temperature range. The supply voltage range of 3V to 36V encompasses the original 5V to 30V specification. Input offset voltage of 5mV and input bias current of 0.25µA are within acceptable limits. Pin configuration and package footprint (14-SOIC) differ from the original 14-CFlatPack. Verify PCB layout compatibility and temperature requirements before substitution.

Q7: Which substitute offers the best low-temperature performance?

LM2901DT and LM2901HYDT both support operating temperature range down to -40°C. LM2901DT is available in standard commercial grade with -40°C to 125°C range, providing the widest temperature coverage among all substitutes. LM2901HYDT extends to -40°C but does not specify upper temperature limit in the provided data. For applications requiring -55°C operation, no substitute from this list maintains full compatibility with the original specification.

Q8: What inventory considerations should guide substitute selection?

LM2901DT has the highest inventory availability at 185,200 pieces, followed by LM239PT at 84,090 pieces. LM339PT offers 84,090 pieces. LM339APT provides 16,250 pieces. LM2901HYDT has limited availability at 4,310 pieces. For high-volume production, LM2901DT or LM239PT are recommended based on inventory depth and lead-time assurance.

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