LM339N/PB Equivalent & Substitute Parts Reference

Part Overview

The LM339N/PB is a general-purpose comparator IC manufactured by Texas Instruments, featuring four independent comparators in a 14-DIP package with open-collector outputs. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement.

The LM339N/PB operates across a wide supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and is suitable for applications requiring precision voltage comparison with open-collector output configuration. Due to its obsolete status, equivalent parts from active product lines and alternative manufacturers provide continuity for system maintenance and new designs.

Key Parameters

Parameter	Value	Specification Notes
Number of Elements	4	Four independent comparators per package
Output Type	Open-Collector	Allows wire-OR configuration and flexible pull-up voltage selection
Voltage Supply Range (Single)	2V ~ 36V	Wide operating range for diverse applications
Voltage Supply Range (Dual)	±1V ~ ±18V	Symmetric supply capability
Input Offset Voltage (Max)	5mV @ 30V	Precision specification at maximum supply voltage
Input Bias Current (Max)	0.25µA @ 5V	Low input current requirement
Output Current (Typ)	16mA @ 5V	Typical sink current capability
Quiescent Current (Max)	2.5mA	Maximum supply current at no-load condition
Operating Temperature	0°C ~ 70°C	Commercial temperature range
Package Type	14-DIP (0.300", 7.62mm)	Through-hole mounting configuration

Substitute Part Grouping Explanation

Substitution eligibility for the LM339N/PB is determined by strict alignment of the following critical parameters:

Functional Equivalence Criteria:

Number of Elements: Must be 4 independent comparators
Output Type: Must be open-collector configuration
Supply Voltage Range: Must support 2V ~ 36V (single) and ±1V ~ ±18V (dual) minimum
Input Offset Voltage: Must not exceed 5mV @ 30V
Input Bias Current: Must not exceed 0.25µA @ 5V
Output Current: Must support minimum 16mA @ 5V
Quiescent Current: Must not exceed 2.5mA

Package Compatibility Considerations: Substitutes are grouped into two categories based on mounting technology:

Through-Hole DIP Packages (14-DIP): Direct pin-compatible replacements
Surface-Mount SOIC Packages (14-SOIC): Functional equivalents requiring PCB redesign

All substitute parts listed maintain electrical parameter compatibility within the specified tolerances. Differences in product status (active vs. obsolete) and RoHS compliance are noted for procurement and regulatory considerations.

Parameter Comparison

Parameter	LM339N/PB (TI)	LM339N (STMicroelectronics)	LM339N/NOPB (TI)	AS339MTR-G1 (Diodes Inc.)
Manufacturer	Texas Instruments	STMicroelectronics	Texas Instruments	Diodes Incorporated
Number of Elements	4	4	4	4
Output Type	Open-Collector	Open-Collector	Open-Collector	Open-Collector
Supply Voltage (Single)	2V ~ 36V	2V ~ 32V	2V ~ 36V	2V ~ 36V
Supply Voltage (Dual)	±1V ~ ±18V	±1V ~ ±16V	±1V ~ ±18V	±1V ~ ±18V
Input Offset Voltage (Max)	5mV @ 30V	5mV @ 30V	5mV @ 5V	5mV @ 5V
Input Bias Current (Max)	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA
Quiescent Current (Max)	2.5mA	2.5mA	2.5mA	2mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-25°C ~ 85°C	-40°C ~ 85°C
Package Type	14-DIP	14-DIP	14-DIP	14-SOIC
Mounting Type	Through Hole	Through Hole	Through Hole	Surface Mount
Product Status	Obsolete	Obsolete	Active	Active
RoHS Compliance	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: LM339N/NOPB (Texas Instruments)

The LM339N/NOPB is the preferred substitute for the LM339N/PB. Both devices are manufactured by Texas Instruments and maintain identical electrical specifications. The LM339N/NOPB differs only in product status (active vs. obsolete) and operating temperature range (-25°C to 85°C vs. 0°C to 70°C). The extended temperature range of the LM339N/NOPB provides superior environmental tolerance. This part is ROHS3 compliant and available in active production, ensuring long-term procurement viability. Pin configuration and package footprint are identical, enabling direct replacement without PCB modification.

Secondary Recommendation: LM339N (STMicroelectronics)

The LM339N from STMicroelectronics provides functional equivalence with identical electrical performance in a 14-DIP through-hole package. This part is ROHS3 compliant. The single-supply voltage range is limited to 2V ~ 32V (versus 2V ~ 36V for the original), and dual-supply range is ±1V ~ ±16V (versus ±1V ~ ±18V). These reduced ranges may be acceptable for applications not requiring maximum supply voltage specifications. This part is also obsolete but offers an alternative source from a major semiconductor manufacturer.

Alternative Recommendation: AS339MTR-G1 (Diodes Incorporated)

The AS339MTR-G1 is a surface-mount equivalent in 14-SOIC package format. This part maintains all critical electrical specifications and is actively produced with ROHS3 compliance. The operating temperature range extends to -40°C to 85°C, providing superior low-temperature performance. Quiescent current is reduced to 2mA maximum. Selection of this part requires PCB redesign to accommodate surface-mount technology and 14-SOIC footprint. This option is suitable for new designs or systems undergoing modernization.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant, addressing regulatory requirements for new procurement. The original LM339N/PB is non-compliant and should be phased out in favor of compliant alternatives for new designs and long-term system support.

Frequently Asked Questions (FAQ)

Q: Can the LM339N/NOPB directly replace the LM339N/PB without any circuit modifications?

A: Yes. The LM339N/NOPB is pin-compatible and electrically equivalent to the LM339N/PB. Both devices use the 14-DIP package with identical pinout. No circuit modifications are required for direct substitution. The extended operating temperature range of the LM339N/NOPB (-25°C to 85°C) provides additional environmental margin compared to the original specification (0°C to 70°C).

Q: What is the key difference between the LM339N from STMicroelectronics and the LM339N/NOPB from Texas Instruments?

A: Both parts are functionally equivalent with identical electrical performance in 14-DIP packages. The primary differences are manufacturer source and product status. The STMicroelectronics version is obsolete, while the Texas Instruments LM339N/NOPB is actively produced. The STMicroelectronics part has a slightly reduced single-supply voltage range (2V ~ 32V vs. 2V ~ 36V) and dual-supply range (±1V ~ ±16V vs. ±1V ~ ±18V). For applications requiring the full 36V single-supply capability, the Texas Instruments part is preferred.

Q: Why would I select the AS339MTR-G1 surface-mount version instead of the through-hole alternatives?

A: The AS339MTR-G1 is appropriate for new designs or system modernization projects where surface-mount technology is the manufacturing standard. This part offers extended operating temperature range (-40°C to 85°C) and reduced quiescent current (2mA maximum). Selection requires PCB redesign to accommodate the 14-SOIC footprint and surface-mount assembly process. Existing through-hole designs should retain DIP-package alternatives to avoid unnecessary redesign costs.

Q: Are all substitute parts RoHS compliant?

A: The LM339N/NOPB, LM339N (STMicroelectronics), and AS339MTR-G1 are all ROHS3 compliant. The original LM339N/PB is non-compliant. For new procurement and designs subject to RoHS regulations, all recommended substitutes meet compliance requirements.

Q: What are the critical electrical parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: (1) four independent comparators, (2) open-collector output configuration, (3) supply voltage range supporting minimum 2V ~ 36V single and ±1V ~ ±18V dual, (4) input offset voltage not exceeding 5mV, (5) input bias current not exceeding 0.25µA, (6) output current capability of at least 16mA, and (7) quiescent current not exceeding 2.5mA. All listed substitutes meet these criteria.

Q: Can I use the AS339MTR-G1 in a through-hole PCB design without modification?

A: No. The AS339MTR-G1 uses a 14-SOIC surface-mount package, while the original LM339N/PB uses a 14-DIP through-hole package. These packages are not mechanically compatible. Using the AS339MTR-G1 requires PCB redesign to accommodate surface-mount footprint and assembly process. For through-hole designs, select the LM339N/NOPB or LM339N alternatives.

Q: What is the inventory status of these substitute parts?

A: The LM339N/NOPB (Texas Instruments) has 3,000 pieces in stock. The LM339N (STMicroelectronics) has 124,829 pieces available. The AS339MTR-G1 (Diodes Incorporated) has 21,100 pieces in stock. Inventory levels indicate strong availability for all recommended substitutes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message