LP339N/PB Equivalent & Substitute Parts

Part Overview

The LP339N/PB is a 4-channel general-purpose comparator IC manufactured by Texas Instruments in a 14-DIP through-hole package. This device operates across a wide supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and features CMOS/MOS output with open-collector configuration. The LP339N/PB is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. Substitute parts must maintain functional compatibility across voltage supply ranges, output characteristics, and thermal operating conditions while accommodating different packaging technologies.

Substiute Parts

LP339N/PB

Texas InstrumentsIn Stock: 1130LP339N/PB Datasheet

Current PartRFQ

LP339N/NOPB

Texas InstrumentsIn Stock: 956LP339N/NOPB Datasheet

DirectRFQ

LM2901AT14-13

Diodes IncorporatedIn Stock: 5307LM2901AT14-13 Datasheet

MFR RecommendedRFQ

TS339CDT

STMicroelectronicsIn Stock: 5517TS339CDT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP339N/PB is determined by the following critical parameters:

Functional Equivalence Criteria:

• Number of comparator elements: 4 channels required
• Supply voltage compatibility: Must support 2V ~ 36V single supply and ±1V ~ ±18V dual supply ranges
• Output type: CMOS, MOS, or open-collector/open-drain configurations acceptable
• Input offset voltage and input bias current within specified maximums
• Quiescent current within 100µA maximum

Package and Mounting Considerations:

• Through-hole 14-DIP packages are direct mechanical equivalents
• Surface-mount alternatives (14-TSSOP, 14-SOIC) require PCB redesign but maintain electrical compatibility
• Packaging type (tube, tape & reel) affects handling and assembly but not electrical function

Compliance and Availability:

• RoHS3 compliance required for environmental standards
• Product status (active vs. obsolete) affects long-term availability and supply chain reliability

Parameter Comparison

Engineering Selection Recommendations

LP339N/NOPB (Direct Through-Hole Equivalent) Select this part for direct replacement in existing through-hole PCB designs. It maintains identical package geometry, supply voltage range, and operating temperature specifications as the LP339N/PB. The primary advantage is active product status with established supply chain availability. Output current capability is increased to 30mA typical, providing improved drive capability without compromising compatibility. Both parts are ROHS3 compliant with unlimited moisture sensitivity rating.

LM2901AT14-13 (Surface-Mount Alternative with Extended Temperature Range) This part is suitable for new designs requiring surface-mount technology or extended operating temperature range (-40°C to 125°C). It maintains the full supply voltage range (2V ~ 36V, ±1V ~ 18V) and provides superior input offset voltage (2mV vs. 5mV). The 14-TSSOP package requires PCB redesign but offers reduced board space. Quiescent current is significantly higher (2.5mA), which may impact low-power applications. Moisture sensitivity level is 3 (168 hours), requiring controlled storage conditions.

TS339CDT (Surface-Mount Alternative with Low Input Bias Current) This STMicroelectronics part offers the lowest input bias current (1pA at 5V) and lowest quiescent current (25µA), making it optimal for precision and low-power applications. Supply voltage range is reduced to 2.7V ~ 16V single supply (±1.35V ~ 8V dual supply), limiting compatibility with designs requiring extended voltage operation. The 14-SOIC package requires PCB redesign. CMRR specification of 75dB is provided, indicating superior common-mode rejection. Moisture sensitivity is unlimited (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can LP339N/NOPB directly replace LP339N/PB without PCB modifications? A: Yes. Both parts use identical 14-DIP through-hole packaging with 0.300" (7.62mm) spacing. Pin configuration, supply voltage range (2V ~ 36V, ±1V ~ 18V), and operating temperature (0°C ~ 70°C) are identical. The primary difference is packaging format (tube vs. bulk) and increased output current capability in the NOPB variant (30mA vs. 10mA typical).

Q: What are the key differences between through-hole and surface-mount substitutes? A: Through-hole parts (LP339N/NOPB) mount vertically through PCB holes and require no design changes. Surface-mount alternatives (LM2901AT14-13 in 14-TSSOP, TS339CDT in 14-SOIC) mount flat on the PCB surface, requiring footprint redesign and reflow soldering. Surface-mount packages offer reduced board space and improved thermal characteristics but demand different assembly processes.

Q: Which substitute is best for low-power applications? A: TS339CDT offers the lowest quiescent current (25µA maximum) and input bias current (1pA at 5V), making it optimal for battery-powered or energy-constrained designs. However, its supply voltage range (2.7V ~ 16V single supply) is narrower than the original part. LM2901AT14-13 provides moderate quiescent current (2.5mA) with full voltage range compatibility.

Q: Are all substitutes RoHS3 compliant? A: Yes. LP339N/NOPB, LM2901AT14-13, and TS339CDT are all ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the impact of moisture sensitivity level differences? A: LP339N/PB, LP339N/NOPB, and TS339CDT have MSL 1 (unlimited storage at any humidity). LM2901AT14-13 has MSL 3 (168-hour maximum exposure to 85% relative humidity at 85°C), requiring controlled storage conditions and bake-out procedures before reflow soldering. This affects supply chain handling and assembly processes.

Q: Can LM2901AT14-13 operate at the full voltage range of the original part? A: Yes. LM2901AT14-13 supports 2V ~ 36V single supply and ±1V ~ 18V dual supply, matching the LP339N/PB specification. However, its extended operating temperature range (-40°C to 125°C) exceeds the original part's 0°C ~ 70°C specification, providing additional design margin for industrial applications.

Q: Is TS339CDT suitable for all applications requiring LP339N/PB? A: TS339CDT is suitable for applications within its supply voltage range (2.7V ~ 16V single supply, ±1.35V ~ 8V dual supply). Designs requiring operation below 2.7V or above 16V single supply must use LP339N/NOPB or LM2901AT14-13. TS339CDT is optimal for precision applications benefiting from its 1pA input bias current and 75dB CMRR specification.