LM3302N Equivalent & Substitute Parts

Part Overview

The LM3302N is a quad general-purpose comparator manufactured by onsemi, housed in a 14-MDIP package. This device features four independent comparators with DTL, MOS, open-collector, and TTL output types, designed for general-purpose signal comparison applications. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations.

Substiute Parts

LM3302N

onsemiIn Stock: 2475LM3302N Datasheet

Current PartRFQ

LM3302N

Harris CorporationIn Stock: 2441LM3302N Datasheet

DirectRFQ

LM339NE3

Texas InstrumentsIn Stock: 18050LM339NE3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM3302N are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Number of comparator elements: 4
• Package type: 14-DIP form factor
• Mounting type: Through Hole
• Output type: Open-Collector capability
• Supply voltage range compatibility
• Input offset voltage performance
• Input bias current specifications
• Output current capability
• Quiescent current consumption
• Operating temperature range

The LM3302N has two identified substitutes: the LM3302N from Harris Corporation (direct equivalent) and the LM339NE3 from Texas Instruments (similar substitute). Both maintain the quad comparator architecture and 14-DIP package format required for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

LM3302N (Harris Corporation): This direct equivalent maintains identical part numbering and is currently in active production status. It provides the most straightforward replacement path for obsolete onsemi inventory, with full compatibility across all specified parameters. Harris Corporation manufacturing ensures continuity of supply for legacy system support.

LM339NE3 (Texas Instruments): This similar substitute offers enhanced performance characteristics, including improved input offset voltage (5mV vs. 20mV) and slightly higher output current capability (20mA vs. 18mA). The LM339NE3 supports an extended supply voltage range (2V ~ 30V vs. 2V ~ 28V) and maintains identical quiescent current specifications. However, the operating temperature range is narrower (0°C ~ 70°C vs. -40°C ~ 85°C), which may restrict use in extended temperature applications. The LM339NE3 is ROHS3 compliant, providing additional environmental compliance benefits.

Both substitutes are REACH unaffected and classified under ECCN EAR99, maintaining regulatory consistency with the original LM3302N.

Frequently Asked Questions (FAQ)

Q: Can the LM3302N (Harris) be used as a direct replacement for the LM3302N (onsemi)?

A: Yes. Both devices share identical part numbering, package format (14-DIP), and core specifications. The Harris version is currently in active production, making it suitable for direct board-level substitution in legacy designs.

Q: What are the key differences between the LM3302N and LM339NE3?

A: The LM339NE3 offers superior input offset voltage performance (5mV vs. 20mV) and slightly higher output current (20mA vs. 18mA). The supply voltage range is marginally extended (±1V ~ 15V vs. ±1V ~ 14V). The primary limitation is the narrower operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C), which excludes use in applications requiring extended temperature operation below 0°C or above 70°C.

Q: Are all three parts pin-compatible?

A: Yes. All three devices use the 14-DIP (0.300", 7.62mm) package with through-hole mounting, ensuring mechanical and electrical pin compatibility for direct PCB substitution.

Q: Which substitute should be selected for new designs?

A: The LM339NE3 is recommended for new designs due to its active production status, improved electrical performance, and ROHS3 compliance. For legacy system maintenance requiring exact specification matching across the full operating temperature range, the Harris LM3302N provides continuity with the original onsemi device.

Q: Do these parts require any circuit modifications for substitution?

A: No circuit modifications are required. All three devices maintain compatible output types (open-collector), supply voltage ranges, and input/output current specifications within the specified operating conditions.

Q: What is the inventory status of these substitutes?

A: The LM3302N (Harris) has 2,369 pieces in stock. The LM339NE3 (TI) has 17,975 pieces in stock, providing greater availability for immediate procurement.