LM339NSRG4 Equivalent & Substitute Parts

Part Overview

The LM339NSRG4 is a general-purpose quad comparator IC manufactured by Texas Instruments, housed in a 14-SO surface mount package. This device features four independent open-collector comparators suitable for applications requiring voltage comparison across a wide supply voltage range of 2V to 30V (single supply) or ±1V to ±15V (dual supply). The LM339NSRG4 is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Number of Elements	4
Output Type	Open-Collector
Voltage - Supply, Single/Dual (±)	2V ~ 30V, ±1V ~ 15V
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Package / Case	14-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LM339NSRG4 is determined by the following critical parameters:

Functional equivalence: Four independent open-collector comparators
Supply voltage compatibility: Parts must support the 2V ~ 30V single supply or ±1V ~ ±15V dual supply range
Output type: Open-collector configuration for direct compatibility
Package compatibility: 14-SOIC surface mount packages with compatible pinouts
Electrical performance: Input offset voltage, input bias current, output current, and quiescent current within acceptable ranges for the application
Product status: Active parts are preferred to ensure long-term availability

Substitute parts are grouped into two categories: MFR Recommended substitutes (direct functional replacements with enhanced specifications) and Parametric Equivalents (parts with identical electrical characteristics in the same package family).

Parameter Comparison

Part Number	Manufacturer	Product Status	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Package	Operating Temp
LM339NSRG4	Texas Instruments	Obsolete	2V ~ 30V, ±1V ~ 15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	14-SOIC (0.209")	0°C ~ 70°C
LM339AM/NOPB	National Semiconductor	Active	2V ~ 36V, ±1V ~ 18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	14-SOIC (0.154")	0°C ~ 70°C
LM339AMX/NOPB	Texas Instruments	Active	2V ~ 36V, ±1V ~ 18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	14-SOIC (0.154")	0°C ~ 70°C
LP339M/NOPB	Texas Instruments	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	14-SOIC (0.154")	0°C ~ 70°C
LP339MX/NOPB	Texas Instruments	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	14-SOIC (0.154")	0°C ~ 70°C
LM339NSR	Texas Instruments	Active	2V ~ 30V, ±1V ~ 15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	14-SOIC (0.209")	0°C ~ 70°C
BA2901YF-CE2	Rohm Semiconductor	Active	2V ~ 36V, ±1V ~ 18V	4mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	14-SOIC (0.173")	-40°C ~ 125°C
BA2901YF-LBH2	Rohm Semiconductor	Active	2V ~ 36V, ±1V ~ 18V	7mV @ 5V	0.05µA @ 5V	16mA @ 5V	2mA	14-SOIC (0.173")	-40°C ~ 125°C
LM339ADT	STMicroelectronics	Active	2V ~ 32V, ±1V ~ 16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	14-SOIC (0.154")	0°C ~ 70°C

Engineering Selection Recommendations

Direct Parametric Equivalent: The LM339NSR is the primary substitute for the LM339NSRG4. Both parts share identical electrical specifications, supply voltage range, and package dimensions (14-SOIC 0.209" width). The LM339NSR is active and maintains full compatibility with existing designs. This part is recommended for direct replacement in applications where the original specification must be preserved.

MFR Recommended Substitutes with Enhanced Specifications: The LM339AM/NOPB, LM339AMX/NOPB, and LM339ADT offer improved input offset voltage (2mV vs. 5mV) and extended supply voltage range (up to 36V vs. 30V). These parts are functionally compatible but use a narrower package body (0.154" width). Verification of PCB layout compatibility is required before substitution.

Low-Power Alternatives: The LP339M/NOPB and LP339MX/NOPB feature significantly reduced quiescent current (100µA vs. 2.5mA) and input bias current (0.025µA vs. 0.25µA), making them suitable for battery-powered or low-power applications. These parts maintain the same supply voltage range and operating temperature as the MFR recommended substitutes.

Automotive-Grade Options: The BA2901YF-CE2 and BA2901YF-LBH2 from Rohm Semiconductor provide extended operating temperature range (-40°C to 125°C) and automotive qualification (AEC-Q100). These parts are suitable for automotive and industrial applications requiring wider temperature operation. Package width is 0.173", requiring PCB layout verification.

All substitute parts listed are ROHS3 compliant and carry REACH Unaffected status, maintaining regulatory compliance with the original LM339NSRG4.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LM339NSRG4 with LM339NSR without any modifications? A: Yes. The LM339NSR is a parametric equivalent with identical electrical specifications and package dimensions. No circuit modifications are required. Both parts are housed in 14-SOIC packages with 0.209" body width and support the same supply voltage range.

Q: What is the difference between LM339AM/NOPB and LM339AMX/NOPB? A: Both parts have identical electrical specifications and package dimensions. The primary difference is packaging format: LM339AM/NOPB is supplied in Tube packaging, while LM339AMX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Electrical performance and pinout are identical.

Q: Why do LP339M/NOPB and LP339MX/NOPB have higher quiescent current specifications than other substitutes? A: The LP339 series uses CMOS/MOS output technology, which results in higher quiescent current (100µA) compared to standard open-collector designs (2.5mA typical). However, these parts offer significantly lower input bias current (0.025µA vs. 0.25µA), making them advantageous for high-impedance input applications and battery-powered systems.

Q: Are the Rohm BA2901YF series parts pin-compatible with the LM339NSRG4? A: Yes, the BA2901YF series maintains the same 14-pin SOIC pinout as the LM339NSRG4. However, the package body width differs (0.173" vs. 0.209"), requiring verification of PCB footprint compatibility before substitution.

Q: Can I use BA2901YF parts in applications with operating temperatures above 70°C? A: Yes. The BA2901YF series supports extended operating temperature range from -40°C to 125°C, making them suitable for high-temperature industrial and automotive applications where the LM339NSRG4 (0°C to 70°C) would be inadequate.

Q: What is the significance of the different package widths (0.154", 0.173", 0.209")? A: Package width affects PCB footprint dimensions. Parts with narrower bodies (0.154", 0.173") require different PCB layouts than the original 0.209" width. Verify that your PCB design accommodates the substitute part's physical dimensions before implementation.

Q: Are all listed substitute parts ROHS3 compliant? A: Yes. All substitute parts listed carry ROHS3 Compliant status and REACH Unaffected designation, maintaining regulatory compliance with the original LM339NSRG4.

Q: Which substitute should I choose for a new design? A: For new designs, LM339AMX/NOPB or LM339ADT are recommended due to active product status, improved input offset voltage specifications, and extended supply voltage range. Verify package width compatibility with your PCB layout. For low-power applications, consider LP339MX/NOPB. For automotive applications, select BA2901YF-CE2.

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