LM139AW/883 Equivalent & Substitute Parts Reference

Part Overview

The LM139AW/883 is a low-power, low-offset voltage quad comparator manufactured by Texas Instruments in a 14-CFlatPack surface mount package. This general-purpose 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 unlimited moisture sensitivity rating.

Substitute parts are necessary when the 14-CFlatPack package is unavailable, when alternative manufacturers' inventory is required, or when different package formats better suit application requirements while maintaining electrical compatibility within specified parameter tolerances.

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	Low-power characteristic
Current - Output (Typ)	20mA	Output drive capability
Current - Quiescent (Max)	2mA	Standby power consumption
Operating Temperature	-55°C ~ 125°C	Extended industrial range
Package / Case	14-CFlatPack	Surface mount
RoHS Status	ROHS3 Compliant	Environmental compliance

Substitute Part Grouping Explanation

Substitution eligibility for the LM139AW/883 is determined by the following critical parameters:

Core Compatibility Criteria:

Number of Elements: Must be 4 (quad configuration)
Output Type: Must include Open-Collector or Open-Drain capability
Supply Voltage Range: Substitute must support the required operating voltage window
Input Offset Voltage: Maximum specification must not exceed application requirements
Input Bias Current: Must be within acceptable limits for the circuit design
Output Current: Minimum 16mA typical output drive
Quiescent Current: Maximum 2.5mA acceptable
Operating Temperature: Must cover -55°C to 125°C or application-specific subset
Package Type: Alternative packages acceptable if electrical parameters align
Product Status: Must be Active
Compliance: ROHS3 compliance required

Substitution Logic: Parts are grouped by manufacturer and package type while maintaining electrical parameter compatibility. The LM139ADR (14-SOIC), LM239DT (14-SOIC), and LM239DTBR2G (14-TSSOP) represent direct functional equivalents with different package formats. The LM2901 series variants provide broader supply voltage ranges (3V to 36V) suitable for extended applications. All substitute parts maintain the quad comparator configuration with open-collector/open-drain outputs and active product status.

Parameter Comparison

Parameter	LM139AW/883	LM139ADR	LM239DT	LM239DTBR2G	LM2901D	LM2901DR2G	LM2901DT	LM2901PT	LM2901VDR2G	LM339AD
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	onsemi	STMicroelectronics	onsemi	STMicroelectronics	STMicroelectronics	onsemi	Motorola
Number of Elements	4	4	4	4	4	4	4	4	4	4
Output Type	Open-Collector, Open-Drain	Open-Collector, Open-Drain	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL
Voltage - Supply Single (V)	5 ~ 30	2 ~ 30	2 ~ 32	3 ~ 36	2 ~ 32	3 ~ 36	2 ~ 32	2 ~ 32	3 ~ 36	2 ~ 36
Voltage - Supply Dual (±V)	±2.5 ~ 15	±1 ~ 15	±1 ~ 16	±1.5 ~ 18	±1 ~ 16	±1.5 ~ 18	±1 ~ 16	±1 ~ 16	±1.5 ~ 18	±1 ~ 18
Voltage - Input Offset (Max)	2mV @ 30V	2mV @ 30V	5mV @ 30V	5mV @ 5V	7mV @ 5V	7mV @ 5V	7mV @ 5V	7mV @ 5V	7mV @ 5V	2mV @ 5V
Current - Input Bias (Max)	1000pA @ 5V	0.1µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.025µA @ 5V
Current - Output (Typ)	20mA	20mA	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V
Current - Quiescent (Max)	2mA	2mA	2mA	2.5mA	2.5mA	2.5mA	2.5mA	2.5mA	2.5mA	2mA
Operating Temperature	-55 ~ 125°C	-55 ~ 125°C	-40 ~ 105°C	-25 ~ 85°C	-40 ~ 125°C	-40 ~ 105°C	-40 ~ 125°C	-40 ~ 125°C	-40 ~ 125°C	0 ~ 70°C
Package / Case	14-CFlatPack	14-SOIC	14-SOIC	14-TSSOP	14-SOIC	14-SOIC	14-SOIC	14-TSSOP	14-SOIC	14-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	REACH Unaffected
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Recommended Primary Substitutes):

LM139ADR and LM339AD maintain the lowest input offset voltage specification (2mV) matching the LM139AW/883 precision characteristics. Both are Active status products with ROHS3 compliance. LM139ADR operates across the full -55°C to 125°C temperature range in 14-SOIC package. LM339AD provides equivalent precision but with narrower temperature range (0°C to 70°C).

Tier 2 - Functional Equivalents (Extended Supply Range):

LM239DT, LM239DTBR2G, LM2901D, LM2901DR2G, LM2901DT, LM2901PT, and LM2901VDR2G all maintain quad comparator configuration with open-collector/open-drain outputs and Active product status. These parts accept broader supply voltage ranges (2V to 36V single supply, ±1V to ±18V dual supply) compared to the LM139AW/883 (5V to 30V, ±2.5V to ±15V). Input offset voltage specifications range from 5mV to 7mV, acceptable for general-purpose applications with relaxed precision requirements.

Package Considerations:

14-SOIC: LM139ADR, LM239DT, LM2901D, LM2901DR2G, LM2901DT, LM2901VDR2G
14-TSSOP: LM239DTBR2G, LM2901PT
16-QFN: LM2901Q4T (limited parameter data; verify application compatibility)

Temperature Range Limitations:

LM239DTBR2G operates only to 85°C maximum; unsuitable for applications requiring full -55°C to 125°C range. LM239DT and LM2901DR2G limited to 105°C maximum. LM339AD limited to 70°C maximum. Select LM139ADR, LM2901DT, LM2901PT, or LM2901VDR2G for extended temperature applications.

Compliance Status:

All recommended substitutes maintain ROHS3 compliance and Active product status. LM339AD carries REACH Unaffected designation; verify compliance requirements for specific applications.

Frequently Asked Questions (FAQ)

Q1: Can I substitute LM139AW/883 with LM2901 series parts?

A: Yes. LM2901D, LM2901DR2G, LM2901DT, LM2901PT, and LM2901VDR2G are functionally compatible. All maintain quad comparator configuration with open-collector/open-drain outputs. However, input offset voltage increases from 2mV to 7mV, and quiescent current increases from 2mA to 2.5mA. Verify these parameter changes do not affect circuit performance before substitution.

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

A: Both are 14-pin surface mount packages with identical electrical functionality. 14-SOIC (0.154" width, 3.90mm) and 14-TSSOP (0.173" width, 4.40mm) differ in physical dimensions and PCB footprint. Verify PCB layout compatibility before selecting package variant. Electrical performance is equivalent.

Q3: Why does LM239DTBR2G have a lower maximum operating temperature (85°C) than LM139AW/883 (125°C)?

A: LM239DTBR2G is manufactured by onsemi with different thermal specifications than the Texas Instruments LM139AW/883. For applications requiring -55°C to 125°C operation, select LM139ADR, LM2901DT, LM2901PT, or LM2901VDR2G instead.

Q4: Is LM339AD a suitable substitute?

A: LM339AD matches the 2mV input offset voltage specification and provides equivalent precision. However, operating temperature range is limited to 0°C to 70°C, making it unsuitable for extended industrial temperature applications. Use only in commercial temperature range applications.

Q5: What are the key parameters that determine substitution compatibility?

A: Critical parameters are: (1) quad comparator configuration (4 elements), (2) open-collector/open-drain output type, (3) supply voltage range compatibility, (4) input offset voltage within application tolerance, (5) input bias current specification, (6) output current capability (minimum 16mA), (7) operating temperature range coverage, (8) Active product status, and (9) ROHS3 compliance. All substitute parts listed meet these criteria.

Q6: Can I use LM2901Q4T (16-QFN package) as a substitute?

A: LM2901Q4T maintains quad comparator configuration and Active status. However, multiple electrical parameters lack specification data (input offset voltage, input bias current, output current, operating temperature). Verify complete parameter availability and application compatibility before selection. 16-QFN package also requires different PCB footprint design.

Q7: Which substitute offers the best inventory availability?

A: LM2901DT (STMicroelectronics) has 185,200 pieces in stock, followed by LM2901DR2G (onsemi) with 127,336 pieces. LM139ADR (Texas Instruments) has 21,330 pieces available. Inventory levels support immediate procurement for high-volume applications.

Q8: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance. LM339AD carries REACH Unaffected designation. Verify specific compliance requirements for your application and regional regulations.

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