LM393M Equivalent & Substitute Parts

Part Overview

The LM393M is a dual general-purpose comparator IC manufactured by onsemi in 8-SOIC surface-mount packaging. This device operates across a wide supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and is designed for general-purpose comparison applications. The LM393M is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain functional compatibility while offering active product status and enhanced availability.

Key Parameters

Parameter	LM393M Specification
Number of Elements	2
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 5V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	18mA @ 5V
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the LM393M is determined by the following critical parameters:

Package Compatibility: 8-SOIC or 8-SOP form factor with 0.154" to 0.173" width tolerance
Functional Elements: Dual comparator configuration (2 elements)
Supply Voltage Range: Minimum 2V to 36V single supply or ±1V to ±18V dual supply capability
Input Offset Voltage: Maximum 7mV @ 5V (allows tolerance variation)
Input Bias Current: Maximum 0.25µA @ 5V
Output Current: Minimum 16mA @ 5V
Quiescent Current: Maximum 2.5mA
Output Type: Open-Collector or Open-Collector with Rail-to-Rail capability
Surface Mount: Required for PCB compatibility

All substitute parts listed maintain these core electrical and mechanical parameters within acceptable engineering tolerances. Substitute parts are grouped by manufacturer and product status (Active vs. Obsolete).

Parameter Comparison

Part Number	Manufacturer	Product Status	Supply Voltage	Input Offset (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Package	Output Type
LM393M	onsemi	Obsolete	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	18mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC (3.90mm)	—
LM393DR2G	onsemi	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC (3.90mm)	Open-Collector, Rail-to-Rail
AS393AMTR-E1	Diodes Incorporated	Active	2V ~ 36V, ±1V ~ 18V	3mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC (3.90mm)	Open-Collector
AS393MTR-E1	Diodes Incorporated	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC (3.90mm)	Open-Collector
AS393MTR-G1	Diodes Incorporated	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC (3.90mm)	Open-Collector
BA10393F-E2	Rohm Semiconductor	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOP (4.40mm)	Open-Collector
BA2903SF-E2	Rohm Semiconductor	Active	2V ~ 36V, ±1V ~ 18V	7mV @ 5V	16mA @ 5V	1mA	-40°C ~ 105°C	8-SOP (4.40mm)	Open-Collector
BA2903YF-CE2	Rohm Semiconductor	Active	2V ~ 36V, ±1V ~ 18V	4mV @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	8-SOP (4.40mm)	Open-Collector
LM193DT	STMicroelectronics	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	18mA @ 5V	2.5mA	-55°C ~ 125°C	8-SOIC (3.90mm)	Open-Collector, Rail-to-Rail
LM2903D	STMicroelectronics	Active	2V ~ 36V, ±1V ~ 18V	7mV @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	8-SOIC (3.90mm)	Open-Collector, Rail-to-Rail
LM2903DR	UMW	Active	2V ~ 30V, ±1V ~ ±15V	5mV @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOP (3.90mm)	Open-Collector, Rail-to-Rail

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

LM193DT (STMicroelectronics) and LM393DR2G (onsemi) are the closest functional equivalents. Both maintain identical output current specifications (18mA and 16mA respectively at 5V), matching quiescent current limits (2.5mA), and identical 8-SOIC packaging. LM193DT offers extended operating temperature range (-55°C to 125°C) and active product status with RoHS3 compliance. LM393DR2G maintains onsemi manufacturing continuity with active status and identical packaging geometry.

Secondary Substitutes (Electrical Compatibility with Package Variation)

AS393MTR-E1 and AS393MTR-G1 (Diodes Incorporated) provide full electrical parameter compatibility with identical supply voltage and input offset specifications. These parts feature reduced quiescent current (1mA vs. 2.5mA) and extended operating temperature (-40°C to 85°C). Packaging is 8-SOIC with identical 3.90mm width. Moisture sensitivity differs (MSL 3 vs. MSL 1), requiring storage condition verification.

Automotive-Grade Alternative

BA2903YF-CE2 (Rohm Semiconductor) is AEC-Q100 qualified for automotive applications with extended temperature range (-40°C to 125°C). This part features 8-SOP packaging (4.40mm width) requiring PCB layout verification for pin-to-pin compatibility. Input offset is 4mV @ 5V with reduced quiescent current (1mA).

Temperature-Extended Options

LM2903D (STMicroelectronics) and BA2903SF-E2 (Rohm Semiconductor) extend operating temperature to -40°C to 125°C and -40°C to 105°C respectively, suitable for industrial and extended-range applications. Both maintain core electrical specifications with 8-SOIC or 8-SOP packaging.

Voltage Range Limitation

LM2903DR (UMW) operates within 2V to 30V single supply (vs. 36V maximum), limiting use in high-voltage applications. This part is suitable only for designs operating below 30V supply.

All substitute parts maintain RoHS3 compliance and REACH unaffected status. Selection should prioritize product status (Active preferred over Obsolete), packaging geometry match, and operating temperature requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can LM393M be directly replaced with LM393DR2G?

A: Yes. LM393DR2G is a direct pin-compatible substitute with identical 8-SOIC packaging, matching supply voltage range (2V to 36V / ±1V to ±18V), and equivalent electrical performance. LM393DR2G is active product status with higher inventory availability.

Q: What is the difference between 8-SOIC and 8-SOP packaging?

A: Both are 8-pin surface-mount packages with identical pin count and function. 8-SOIC has 0.154" width (3.90mm), while 8-SOP has 0.173" width (4.40mm). PCB footprints differ; verify layout compatibility before substitution. Pin spacing and pitch remain compatible for most applications.

Q: Does AS393MTR-E1 have lower quiescent current than LM393M?

A: Yes. AS393MTR-E1 draws 1mA quiescent current maximum versus 2.5mA for LM393M. This 60% reduction benefits battery-powered and low-power applications. All other electrical parameters remain within specification.

Q: Is BA2903YF-CE2 suitable for automotive applications?

A: Yes. BA2903YF-CE2 carries AEC-Q100 qualification and operates across -40°C to 125°C, meeting automotive temperature and reliability requirements. Verify PCB layout compatibility due to 8-SOP packaging (4.40mm width vs. standard 3.90mm).

Q: What is the impact of input offset voltage variation across substitutes?

A: Input offset ranges from 3mV (AS393AMTR-E1) to 7mV (BA2903SF-E2 and LM2903D). For precision comparison applications, lower offset improves accuracy. For general-purpose switching applications, this variation is typically negligible. Verify application-specific offset requirements.

Q: Can LM2903DR replace LM393M in all applications?

A: LM2903DR is functionally compatible but operates only to 30V single supply (vs. 36V maximum for LM393M). Use only in designs with supply voltage below 30V. All other parameters remain compatible.

Q: What is MSL (Moisture Sensitivity Level) and why does it matter?

A: MSL indicates moisture absorption risk during storage. MSL 1 (unlimited shelf life) is preferred for standard applications. MSL 3 (168-hour limit) requires controlled storage conditions. AS393MTR-E1 and AS393MTR-G1 specify MSL 3; verify storage capability before procurement.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification. LM393M status is not specified in provided data.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message