LM339SNG Equivalent & Substitute Parts

Part Overview

The LM339SNG is a quad comparator IC manufactured by onsemi in 14-DIP packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The LM339 series represents a foundational comparator architecture widely adopted across the industry, with multiple manufacturers offering compatible alternatives in various package formats and product statuses.

Key Parameters

Parameter	LM339SNG
Manufacturer	onsemi
Part Number	LM339SNG
Category	Linear Comparator
Package Type	14-DIP
Number of Elements	4
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99

Substitute Part Grouping Explanation

Substitution of the LM339SNG is determined by the following criteria:

Functional Equivalence: All substitute parts maintain the quad comparator architecture with 4 independent comparator elements, ensuring pin-compatible operation at the functional level.

Electrical Compatibility: Substitute parts operate within overlapping supply voltage ranges (minimum 2V single supply or ±1V dual supply) and maintain comparable input offset voltage, input bias current, and output current specifications.

Package Considerations: While the LM339SNG uses 14-DIP through-hole packaging, substitutes are available in surface-mount variants (14-SOIC, 14-TSSOP, 16-QFN) and through-hole formats (14-PDIP). Package selection depends on board design requirements.

Product Status and Compliance: Active substitutes with ROHS3 compliance and current manufacturing status are prioritized for new designs, while obsolete alternatives maintain electrical compatibility for legacy system support.

Parameter Comparison

Part Number	Manufacturer	Package Type	Mounting Type	Product Status	Supply Voltage (Single/Dual)	Input Offset (Max)	Input Bias Current (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temperature	RoHS Status
LM339SNG	onsemi	14-DIP	Through Hole	Obsolete	-	-	-	-	-	-	-
LM339DR2G	onsemi	14-SOIC	Surface Mount	Active	3V ~ 36V, ±1.5V ~ 18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	ROHS3 Compliant
LM2901N/NOPB	Texas Instruments	14-DIP	Through Hole	Active	2V ~ 36V, ±1V ~ 18V	7mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 85°C	ROHS3 Compliant
LM2901N	National Semiconductor	-	-	Active	-	-	-	-	-	-	-
LM139ADT	STMicroelectronics	14-SOIC	Surface Mount	Active	2V ~ 32V, ±1V ~ 16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-55°C ~ 125°C	ROHS3 Compliant
LM239QT	STMicroelectronics	16-QFN (3x3)	Surface Mount	Active	2V ~ 36V, ±1V ~ 18V	5mV	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	ROHS3 Compliant
LM2901YPT	STMicroelectronics	14-TSSOP	Surface Mount	Active	2V ~ 32V, ±1V ~ 16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	ROHS3 Compliant
LM339AD	Motorola	14-SOIC	Surface Mount	Active	2V ~ 36V, ±1V ~ 18V	2mV @ 5V	0.025µA @ 5V	16mA @ 5V	2mA	0°C ~ 70°C	-
LM339APT	STMicroelectronics	14-TSSOP	Surface Mount	Active	2V ~ 32V, ±1V ~ 16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	ROHS3 Compliant
LM339MX	onsemi	14-SOIC	Surface Mount	Obsolete	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	0.25µA @ 5V	18mA @ 5V	2.5mA	0°C ~ 70°C	-
LM339QT	STMicroelectronics	16-QFN (3x3)	Surface Mount	Active	2V ~ 36V, ±1V ~ 18V	-	-	-	2.5mA	-	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Through-Hole Replacement: LM2901N/NOPB (Texas Instruments) provides the closest form-factor match in 14-DIP packaging with active product status and ROHS3 compliance. This part extends the operating temperature range to -40°C ~ 85°C compared to the original specification.

For Surface-Mount Migration: LM339DR2G (onsemi) maintains manufacturer continuity while transitioning to 14-SOIC surface-mount technology. This part is actively manufactured and ROHS3 compliant.

For Extended Temperature Applications: LM139ADT (STMicroelectronics) and LM239QT (STMicroelectronics) support operating ranges to -55°C ~ 125°C and -40°C ~ 105°C respectively, suitable for industrial and automotive environments.

For Automotive-Grade Requirements: LM2901YPT (STMicroelectronics) carries AEC-Q100 qualification in 14-TSSOP packaging with -40°C ~ 125°C operating range.

For Legacy System Support: LM339MX (onsemi) maintains electrical compatibility despite obsolete status, available in current inventory for sustaining production.

All recommended substitutes maintain REACH Unaffected status and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can LM339SNG be directly replaced with LM2901N/NOPB?

A: Yes. Both use 14-DIP through-hole packaging and maintain functional quad comparator architecture. LM2901N/NOPB is actively manufactured with ROHS3 compliance and extended operating temperature range (-40°C ~ 85°C). Pin configuration and electrical characteristics are compatible.

Q: What is the primary difference between DIP and SOIC package substitutes?

A: DIP packages use through-hole mounting for breadboard and legacy PCB designs. SOIC packages use surface-mount technology for modern PCB layouts. Electrical function remains identical; package selection depends on board design requirements and manufacturing capability.

Q: Are surface-mount alternatives electrically equivalent to the original DIP package?

A: Yes. Surface-mount variants (14-SOIC, 14-TSSOP, 16-QFN) maintain the same quad comparator functionality and electrical specifications. Package format does not affect core comparator performance.

Q: Which substitute offers the best temperature performance?

A: LM139ADT and LM239QT support -55°C ~ 125°C operating range, the widest specification among active substitutes. LM2901YPT extends to -40°C ~ 125°C with automotive qualification.

Q: Is RoHS compliance required for all substitutes?

A: ROHS3 compliance is standard for all active substitutes. Obsolete parts (LM339MX, LM339AD) may lack formal RoHS certification but remain functionally compatible for legacy applications.

Q: Can 16-QFN packages (LM239QT, LM339QT) replace 14-DIP directly?

A: No. 16-QFN packages have different pin counts and footprints. These are functional equivalents requiring PCB redesign. Use only when board layout permits QFN footprint integration.

Q: What is the inventory status for active substitutes?

A: LM2901YPT (55,300 pcs), LM339MX (22,600 pcs), and LM339DR2G (205,200 pcs) maintain substantial current inventory. LM2901N/NOPB (3,150 pcs) and LM139ADT (4,825 pcs) have moderate availability.

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