LM239NG4 Equivalent & Substitute Parts

Part Overview

The LM239NG4 is a general-purpose comparator IC featuring four independent differential comparators with open-collector outputs. Manufactured by Texas Instruments, this component operates across a wide supply voltage range of 2V to 30V (single supply) or ±1V to ±15V (dual supply), making it suitable for analog signal comparison applications in industrial and consumer electronics.

The LM239NG4 is classified as obsolete. Locating equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this comparator.

Substiute Parts

LM239NG4

Texas InstrumentsIn Stock: 898LM239NG4 Datasheet

Current PartRFQ

LM239N

Texas InstrumentsIn Stock: 25060LM239N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM239NG4 is based on strict electrical and mechanical parameter matching within the LM239 base product family. The primary substitute identified is the LM239N, which maintains functional equivalence through the following critical parameters:

Key Substitution Criteria:

• Identical number of comparator elements (4 differential comparators)
• Identical output type (open-collector)
• Identical supply voltage range (2V ~ 30V single supply, ±1V ~ ±15V dual supply)
• Identical input offset voltage specification (5mV @ 30V)
• Identical input bias current specification (0.25µA @ 5V)
• Identical output current capability (20mA typical)
• Identical quiescent current specification (2mA maximum)
• Identical package form factor (14-DIP, 0.300", 7.62mm)
• Identical mounting type (through hole)
• Identical base product number (LM239)

The LM239N differs from the LM239NG4 in product status (active versus obsolete), packaging format (tube versus unspecified), and operating temperature range (-25°C ~ 85°C versus -25°C ~ 125°C). These differences do not affect functional substitution for applications operating within the narrower temperature range of the substitute part.

Parameter Comparison

Engineering Selection Recommendations

The LM239N is the direct substitute for the LM239NG4. Both parts are manufactured by Texas Instruments and comply with ROHS3 standards, ensuring regulatory alignment for new designs and legacy system support.

The LM239N carries active product status, providing assured long-term availability and supply chain stability compared to the obsolete LM239NG4. This substitution is appropriate for applications where the operating temperature range does not exceed 85°C. For applications requiring operation above 85°C up to 125°C, alternative comparator solutions outside the LM239 family must be evaluated.

Both parts are pin-compatible and functionally equivalent across all specified electrical parameters, enabling direct replacement in through-hole PCB designs without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the LM239N directly replace the LM239NG4 in existing designs?

A: Yes, the LM239N is a direct functional substitute for the LM239NG4. Both parts share identical pin configurations, package form factor (14-DIP), and electrical specifications. No circuit modifications are required for substitution.

Q: What is the primary difference between these two parts?

A: The LM239NG4 is obsolete, while the LM239N is active. The LM239N operates across a narrower temperature range (-25°C ~ 85°C) compared to the LM239NG4 (-25°C ~ 125°C). Applications operating within the LM239N temperature specification are unaffected by this difference.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant and REACH unaffected. Compliance status is equivalent between the two parts.

Q: What packaging formats are available for the LM239N?

A: The LM239N is supplied in tube packaging. The LM239NG4 packaging format was not specified in the original documentation.

Q: Can I use the LM239N in applications requiring operation above 85°C?

A: No. The LM239N is specified for operation only to 85°C maximum. Applications requiring operation up to 125°C must use the LM239NG4 or identify alternative comparator components rated for extended temperature ranges.

Q: Are the electrical characteristics identical between these parts?

A: Yes. Input offset voltage, input bias current, output current, quiescent current, and supply voltage ranges are identical across all specified parameters.