LM393AM Equivalent & Substitute Parts

Part Overview

The LM393AM is a dual general-purpose comparator 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 LM393AM is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility within the specified parameter ranges while meeting current product availability and compliance requirements.

Key Parameters

Parameter	LM393AM Value	Unit
Number of Elements	2	—
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V	V
Voltage - Input Offset (Max)	2mV @ 5V	mV
Current - Input Bias (Max)	0.25µA @ 5V	µA
Current - Output (Typ)	18mA @ 5V	mA
Current - Quiescent (Max)	2.5mA	mA
Operating Temperature	0°C ~ 70°C	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the LM393AM is determined by the following critical parameters:

Electrical Compatibility Requirements:

Supply voltage range must encompass or match 2V ~ 36V (single) and ±1V ~ 18V (dual)
Input offset voltage must not exceed 2mV @ 5V specification
Input bias current must not exceed 0.25µA @ 5V specification
Output current capability must be at least 18mA @ 5V
Quiescent current must not exceed 2.5mA

Mechanical & Packaging Requirements:

Package type: 8-SOIC surface mount only
Package width: 0.154" (3.90mm) standard SOIC width
Mounting type: Surface mount

Environmental & Compliance Requirements:

Operating temperature range must include or exceed 0°C ~ 70°C
Moisture sensitivity level must be 1 (Unlimited) or equivalent
RoHS3 compliance preferred for active parts

Substitute parts are grouped into two categories: onsemi direct equivalents (same base product number or compatible series) and cross-manufacturer alternatives (Diodes Incorporated, Rohm Semiconductor, STMicroelectronics) that meet all electrical and mechanical specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Input Offset (Max)	Output Current (Typ)	Operating Temp	Package	MSL
LM393AM	onsemi	Obsolete	2mV @ 5V	18mA @ 5V	0°C ~ 70°C	8-SOIC	1
LM393DR2G	onsemi	Active	5mV @ 30V	16mA @ 5V	0°C ~ 70°C	8-SOIC	1
LM2903DR2G	onsemi	Active	7mV @ 30V	16mA @ 5V	-40°C ~ 105°C	8-SOIC	1
LM2903VDR2G	onsemi	Active	7mV @ 30V	16mA @ 5V	-40°C ~ 125°C	8-SOIC	1
LM293DR2G	onsemi	Active	5mV @ 30V	16mA @ 5V	-25°C ~ 85°C	8-SOIC	1
NCV2903DR2G	onsemi	Active	7mV @ 30V	16mA @ 5V	-40°C ~ 125°C	8-SOIC	1
LM393AD	STMicroelectronics	Obsolete	2mV @ 30V	18mA @ 5V	0°C ~ 70°C	8-SOIC	1
AS393AMTR-E1	Diodes Incorporated	Active	3mV @ 5V	16mA @ 5V	-40°C ~ 85°C	8-SOIC	1
AS393MTR-E1	Diodes Incorporated	Active	5mV @ 5V	16mA @ 5V	-40°C ~ 85°C	8-SOIC	3
AS393MTR-G1	Diodes Incorporated	Active	5mV @ 5V	16mA @ 5V	-40°C ~ 85°C	8-SOIC	3
BA10393F-E2	Rohm Semiconductor	Active	5mV @ 5V	16mA @ 5V	-40°C ~ 85°C	8-SOP	1

Engineering Selection Recommendations

Primary Recommendation: LM393DR2G (onsemi)

LM393DR2G is the direct active equivalent from onsemi. It maintains identical supply voltage range, operating temperature range (0°C ~ 70°C), and MSL rating (1) as the LM393AM. Input offset voltage increases to 5mV @ 30V and output current decreases to 16mA @ 5V, both within acceptable tolerance for general-purpose comparator applications. RoHS3 compliance and active product status ensure long-term availability and supply chain stability.

Secondary Recommendation: LM393AD (STMicroelectronics)

LM393AD from STMicroelectronics provides electrical performance matching the LM393AM (2mV input offset, 18mA output current) within identical operating temperature and MSL specifications. However, this part is classified as obsolete, limiting its suitability for new designs despite current inventory availability.

Extended Temperature Range Options: LM2903VDR2G or NCV2903DR2G (onsemi)

For applications requiring extended operating temperature coverage beyond 0°C ~ 70°C, LM2903VDR2G (-40°C ~ 125°C) or NCV2903DR2G (-40°C ~ 125°C with automotive qualification) provide broader environmental performance. Both maintain supply voltage compatibility and MSL rating (1). NCV2903DR2G includes AEC-Q100 automotive qualification and 1.3µs propagation delay specification.

Cross-Manufacturer Alternative: AS393AMTR-E1 (Diodes Incorporated)

AS393AMTR-E1 offers the closest input offset voltage specification (3mV @ 5V) among active cross-manufacturer options and maintains MSL rating (1). Operating temperature range (-40°C ~ 85°C) exceeds the LM393AM specification. RoHS3 compliance and high inventory availability support production continuity.

Package Consideration: BA10393F-E2 (Rohm Semiconductor)

BA10393F-E2 is packaged in 8-SOP (0.173", 4.40mm width) rather than standard 8-SOIC (0.154", 3.90mm width). This package difference requires PCB layout modification and is suitable only when mechanical constraints permit alternative footprints.

Frequently Asked Questions (FAQ)

Q: Can LM2903DR2G replace LM393AM directly?

A: LM2903DR2G is electrically compatible within the specified parameter ranges. Input offset voltage increases from 2mV to 7mV @ 30V, and output current decreases from 18mA to 16mA @ 5V. Both changes remain within acceptable limits for general-purpose comparator circuits. Operating temperature range (-40°C ~ 105°C) exceeds the LM393AM specification (0°C ~ 70°C). Direct PCB substitution is possible without circuit modification.

Q: What is the difference between AS393MTR-E1 and AS393MTR-G1?

A: Both parts are electrically identical with identical electrical specifications, operating temperature range (-40°C ~ 85°C), and 8-SOIC packaging. The primary difference is packaging format: AS393MTR-E1 is supplied in Tape & Reel (TR), while AS393MTR-G1 is supplied in Cut Tape (CT) & Digi-Reel®. Both carry MSL rating 3 (168 Hours), requiring controlled moisture exposure during storage and handling.

Q: Why does BA10393F-E2 have a different package width?

A: BA10393F-E2 uses 8-SOP packaging (0.173", 4.40mm width) compared to the standard 8-SOIC (0.154", 3.90mm width) of the LM393AM. This represents a different package family from Rohm Semiconductor. PCB footprint modification is required for substitution. Electrical performance remains compatible.

Q: Is NCV2903DR2G suitable for automotive applications?

A: NCV2903DR2G carries AEC-Q100 automotive qualification and is rated for -40°C ~ 125°C operating temperature. It meets automotive-grade reliability standards. However, use in automotive applications must be confirmed against specific application requirements and design specifications.

Q: What does MSL rating 3 mean for AS393MTR-E1 and AS393MTR-G1?

A: MSL (Moisture Sensitivity Level) rating 3 indicates these parts require controlled moisture exposure during storage and handling. Maximum floor life is 168 hours at 30°C / 60% relative humidity before baking is required. MSL rating 1 (LM393AM, LM393DR2G) indicates unlimited floor life with no moisture sensitivity restrictions.

Q: Can I use LM293DR2G as a substitute?

A: LM293DR2G is electrically compatible with the LM393AM across all critical parameters. Operating temperature range (-25°C ~ 85°C) is narrower than the LM393AM (0°C ~ 70°C) at the lower end but exceeds it at the upper end. Input offset voltage (5mV @ 30V) and output current (16mA @ 5V) remain within acceptable tolerance. Direct substitution is possible for applications within the -25°C ~ 85°C temperature window.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message