LM339AN/PB Equivalent & Substitute Parts

Part Overview

The LM339AN/PB is a general-purpose quad comparator IC manufactured by Texas Instruments, housed in a 14-DIP package for through-hole mounting. This device features open-collector outputs and operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). The part is classified as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning.

Substiute Parts

LM339AN/PB

Texas InstrumentsIn Stock: 944LM339AN/PB Datasheet

Current PartRFQ

LM339AN

Harris CorporationIn Stock: 15713LM339AN Datasheet

DirectRFQ

LM339AN/NOPB

Texas InstrumentsIn Stock: 1604LM339AN/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM339AN/PB is determined by strict equivalence across the following critical parameters:

• Package and Pinout: 14-DIP (0.300", 7.62mm) through-hole mounting
• Functional Architecture: Quad general-purpose comparator with open-collector outputs
• Supply Voltage Range: Minimum 2V to 36V single supply capability
• Input Offset Voltage: Maximum 2mV specification
• Output Current: 16mA typical at 5V
• Quiescent Current: Maximum 2.5mA
• Operating Temperature Range: Support for 0°C to 70°C minimum

Two substitute parts meet these criteria with full parameter compatibility within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

LM339AN (Harris Corporation): This substitute maintains full electrical parameter equivalence with the main part across all critical specifications. Both devices are classified as obsolete with identical RoHS non-compliance status. The Harris variant operates within the same temperature range (0°C ~ 70°C) and supply voltage envelope, with marginally lower input bias current (0.1µA vs. 0.25µA). Selection of this part is appropriate for legacy system maintenance where RoHS compliance is not a design requirement.

LM339AN/NOPB (Texas Instruments): This substitute provides superior compliance posture as an active product with ROHS3 certification. It maintains identical supply voltage range (2V ~ 36V, ±1V ~ 18V) and output specifications. The extended operating temperature range (-25°C ~ 85°C) exceeds the original part's specification. This part is the preferred selection for new designs or systems requiring regulatory compliance, as it eliminates obsolescence risk and meets modern environmental standards.

Frequently Asked Questions (FAQ)

Q: Can LM339AN/NOPB replace LM339AN/PB in existing designs without circuit modification?

A: Yes. Both parts share identical pinout, package geometry (14-DIP), and core electrical parameters including supply voltage range, output type, and current specifications. Direct substitution is possible at the component level.

Q: What is the key difference between the Harris LM339AN and Texas Instruments LM339AN/NOPB?

A: The Harris variant is obsolete with RoHS non-compliance, while the TI LM339AN/NOPB is an active product with ROHS3 certification. The TI part also provides extended operating temperature range (-25°C ~ 85°C vs. 0°C ~ 70°C). For new procurement, the TI variant is recommended.

Q: Are there supply voltage limitations when substituting these parts?

A: The Harris LM339AN operates to 32V single supply (vs. 36V for the main part and TI variant). For applications requiring operation above 32V, only the LM339AN/PB or LM339AN/NOPB are suitable.

Q: Does RoHS compliance affect functional compatibility?

A: No. RoHS compliance is a manufacturing and environmental standard that does not alter electrical performance or pinout. The ROHS3-compliant LM339AN/NOPB is functionally equivalent to non-compliant variants.

Q: Which substitute should be selected for new production designs?

A: LM339AN/NOPB is the recommended choice. It is an active product with modern compliance certifications, eliminating obsolescence risk and meeting current regulatory requirements while maintaining full electrical equivalence.