LM339PW Equivalent & Substitute Parts

Part Overview

The LM339PW is a general-purpose quad comparator IC manufactured by Texas Instruments in 14-TSSOP surface mount packaging. This device features four independent voltage comparators with open-collector outputs, designed for applications requiring precision voltage comparison across a wide supply voltage range of 2V to 30V (single supply) or ±1V to ±15V (dual supply). The LM339PW is currently in Last Time Buy status, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	LM339PW 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-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM339PW is determined by the following critical parameters:

Number of Elements: Must be 4 independent comparators
Output Type: Must support Open-Collector configuration
Supply Voltage Range: Must encompass or exceed 2V ~ 30V (single) or ±1V ~ 15V (dual)
Input Offset Voltage: Maximum 5mV @ 30V or equivalent specification point
Input Bias Current: Maximum 0.25µA @ 5V
Output Current: Minimum 16mA typical (LM339PW specifies 20mA)
Quiescent Current: Maximum 2.5mA
Package: 14-TSSOP or 14-LSSOP (mechanically compatible)
Mounting Type: Surface Mount
Compliance: ROHS3 Compliant, REACH Unaffected

Substitute parts are grouped into two categories based on package compatibility: 14-TSSOP direct equivalents and 14-LSSOP mechanical alternatives with identical pinout and electrical performance within specified tolerances.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	Package	Status
LM339PW	Texas Instruments	2V~30V, ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	14-TSSOP	Last Time Buy
LM339PWR	Rohm Semiconductor	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	—	2mA	0°C ~ 70°C	14-TSSOP	Obsolete
BA10339FV-E2	Rohm Semiconductor	3V~36V, ±1.5V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	14-LSSOP	Active
BA2901SFV-E2	Rohm Semiconductor	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-LSSOP	Active
LM239APT	STMicroelectronics	2V~32V, ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-TSSOP	Active
LM239PT	STMicroelectronics	2V~32V, ±1V~16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-TSSOP	Active
LM2901AT14-13	Diodes Incorporated	2V~36V, ±1V~18V	2mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-TSSOP	Active
LM2901PT	STMicroelectronics	2V~32V, ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-TSSOP	Active
LM2901YPT	STMicroelectronics	2V~32V, ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-TSSOP	Active
LM339APT	STMicroelectronics	2V~32V, ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-TSSOP	Active
LM339DTBR2G	onsemi	3V~36V, ±1.5V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-TSSOP	Active

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (14-TSSOP Package)

LM239PT and LM239APT from STMicroelectronics are the primary direct substitutes. Both maintain identical 14-TSSOP packaging and pinout compatibility. LM239PT is recommended for applications operating within the 0°C to 70°C temperature range matching the LM339PW specification. LM239APT offers superior input offset voltage (2mV @ 30V) and lower input bias current (0.1µA @ 5V) for precision applications, with extended temperature range (-40°C to 105°C) for broader deployment scenarios.

LM2901PT and LM2901YPT from STMicroelectronics provide extended operating temperature range (-40°C to 125°C) with identical electrical performance. LM2901YPT includes AEC-Q100 automotive qualification for applications requiring automotive-grade reliability.

LM2901AT14-13 from Diodes Incorporated offers the widest supply voltage range (2V to 36V, ±1V to ±18V) and extended temperature capability (-40°C to 125°C) with MSL-3 moisture sensitivity rating.

LM339DTBR2G from onsemi maintains the 0°C to 70°C operating range with active product status and full ROHS3 compliance.

Mechanical Alternatives (14-LSSOP Package)

BA10339FV-E2 and BA2901SFV-E2 from Rohm Semiconductor are mechanically compatible alternatives using 14-LSSOP packaging with identical pinout. Both are active products with extended temperature ranges. BA2901SFV-E2 extends to -40°C to 105°C and maintains the full 2V to 36V supply voltage range of the LM339PW.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

Frequently Asked Questions (FAQ)

Q: Can I use LM339PWR as a direct substitute for LM339PW?

A: LM339PWR from Rohm Semiconductor is electrically compatible but is listed as Obsolete product status. While it maintains 14-TSSOP packaging and open-collector output configuration, its obsolete classification makes it unsuitable for new designs or long-term production. Active alternatives such as LM239PT or LM2901PT are recommended.

Q: What is the difference between 14-TSSOP and 14-LSSOP packages?

A: Both packages are mechanically compatible with identical 0.173" width and 4.40mm pitch. The primary difference is in the lead form: TSSOP features gull-wing leads while LSSOP features shrink small outline plastic leads. Pinout and electrical performance are identical, allowing direct PCB substitution.

Q: Which substitute offers the best precision for low-voltage applications?

A: LM239APT and LM339APT both specify 2mV input offset voltage @ 30V with 0.1µA input bias current, providing superior precision compared to the LM339PW specification of 5mV @ 30V. Both are active products with full compliance certifications.

Q: Are there temperature-rated alternatives for extended operating ranges?

A: Yes. LM2901PT, LM2901YPT, and LM2901AT14-13 all extend to -40°C to 125°C operating range. LM2901YPT includes AEC-Q100 automotive qualification. BA2901SFV-E2 extends to -40°C to 105°C in 14-LSSOP packaging.

Q: Do all substitutes maintain the same supply voltage range?

A: No. The LM339PW specifies 2V to 30V (single) or ±1V to ±15V (dual). Most substitutes extend to 2V to 36V or 3V to 36V with ±1V to ±18V or ±1.5V to ±18V dual supply ranges, providing broader operational flexibility. Verify specific application requirements before selection.

Q: What is the significance of MSL rating differences?

A: The LM339PW specifies MSL-1 (Unlimited moisture sensitivity). Most substitutes maintain MSL-1 rating. LM2901AT14-13 specifies MSL-3 (168 Hours), requiring controlled moisture exposure during storage and handling. For standard manufacturing environments, MSL-1 rated parts are preferred.

Q: Can I substitute based on output current specifications alone?

A: No. Output current is one of multiple critical parameters. Substitution requires matching or exceeding all specified parameters: supply voltage range, input offset voltage, input bias current, quiescent current, operating temperature range, and package compatibility. Verify complete electrical specifications before implementation.

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