LM393MX Equivalent & Substitute Parts

Part Overview

The LM393MX is a dual general-purpose comparator manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device features open-collector, rail-to-rail output configuration with a wide supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The LM393MX is currently in Last Time Buy status, making equivalent and substitute parts necessary for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393MX
Manufacturer	Texas Instruments
Package / Case	8-SOIC (0.154", 3.90mm Width)
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	16mA @ 5V
Current - Quiescent (Max)	2.5mA
Propagation Delay (Max)	700ns
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the LM393MX is determined by the following critical parameters:

Primary Substitution Criteria:

Package type: 8-SOIC surface-mount configuration
Number of comparator elements: 2
Output configuration: Open-Collector
Supply voltage range: Minimum 2V ~ 36V (single) or ±1V ~ ±18V (dual)
Input offset voltage: Maximum 5mV or better
Input bias current: Maximum 0.25µA or better
Output current capability: Minimum 16mA @ 5V
Quiescent current: Maximum 2.5mA or better

Substitute parts are grouped into three categories based on their relationship to the LM393MX:

Parametric Equivalent: Parts with identical electrical specifications and packaging, differing only in product status or packaging format (e.g., Cut Tape vs. Digi-Reel).

Upgrade Parts: Components with enhanced specifications (wider temperature range, improved performance metrics) that maintain backward compatibility while offering extended operational capability.

Manufacturer-Recommended Alternatives: Parts from alternative manufacturers (Diodes Incorporated, Rohm Semiconductor, STMicroelectronics, UMW) that meet or exceed the LM393MX electrical and mechanical requirements.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Product Status
LM393MX	Texas Instruments	8-SOIC	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Last Time Buy
LM393MX/NOPB	Texas Instruments	8-SOIC	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active
LM193DT	STMicroelectronics	8-SOIC	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-55°C ~ 125°C	Active
AS393AMTR-E1	Diodes Incorporated	8-SOIC	2V~36V, ±1V~18V	3mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
AS393AMTR-G1	Diodes Incorporated	8-SOIC	2V~36V, ±1V~18V	3mV @ 1.4V	0.4µA @ 5V	16mA	1mA	-40°C ~ 85°C	Active
AS393MTR-E1	Diodes Incorporated	8-SOIC	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
AS393MTR-G1	Diodes Incorporated	8-SOIC	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
BA10393F-E2	Rohm Semiconductor	8-SOP	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
BA2903F-E2	Rohm Semiconductor	8-SOP	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	Active
BA2903SF-E2	Rohm Semiconductor	8-SOP	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 105°C	Active
LM2903DR	UMW	8-SOP	2V~30V, ±1V~±15V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active

Engineering Selection Recommendations

Direct Replacement (Identical Specifications): LM393MX/NOPB is the primary direct replacement, maintaining all electrical and thermal specifications while offering Active product status and improved availability. This part is suitable for applications requiring no design modification.

Extended Temperature Range Applications: LM193DT (STMicroelectronics) extends the operating temperature range to -55°C ~ 125°C while maintaining electrical compatibility. This upgrade is appropriate for industrial and automotive applications requiring wider temperature operation.

Enhanced Performance with Active Status: AS393AMTR-E1 and AS393MTR-E1 (Diodes Incorporated) provide improved quiescent current performance (1mA vs. 2.5mA) and are in Active product status. AS393AMTR-E1 offers superior input offset voltage (3mV @ 5V). These parts are suitable for power-sensitive applications.

Alternative Package Formats: BA10393F-E2, BA2903F-E2, and BA2903SF-E2 (Rohm Semiconductor) are available in 8-SOP packaging (0.173", 4.40mm width) versus the standard 8-SOIC (0.154", 3.90mm width). These alternatives are suitable only if PCB layout accommodates the wider package footprint.

Compliance Verification: All substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the LM393MX regulatory requirements. Moisture sensitivity levels range from MSL 1 (Unlimited) to MSL 3 (168 Hours), requiring appropriate handling protocols during assembly.

Frequently Asked Questions (FAQ)

Q: Can LM393MX/NOPB be used as a direct drop-in replacement for LM393MX?

A: Yes. LM393MX/NOPB is electrically and mechanically identical to LM393MX. The primary difference is product status (Active vs. Last Time Buy) and packaging format (Digi-Reel availability). No design changes are required.

Q: What is the key difference between AS393AMTR-E1 and AS393MTR-E1?

A: Both parts are manufactured by Diodes Incorporated with identical supply voltage, output current, and operating temperature ranges. AS393AMTR-E1 features superior input offset voltage (3mV @ 5V vs. 5mV @ 5V) and lower input bias current specification. AS393MTR-E1 offers higher inventory availability (354,160 pcs vs. 232,200 pcs).

Q: Are the Rohm Semiconductor parts (BA10393F-E2, BA2903F-E2, BA2903SF-E2) pin-compatible with LM393MX?

A: These parts maintain the same 8-pin configuration and pinout as LM393MX. However, the package footprint differs: 8-SOP (0.173", 4.40mm width) versus 8-SOIC (0.154", 3.90mm width). PCB layout modification is required for physical mounting.

Q: Which substitute part offers the widest operating temperature range?

A: BA2903F-E2 (Rohm Semiconductor) supports -40°C ~ 125°C, providing the widest temperature coverage among all listed substitutes. This exceeds the LM393MX specification of 0°C ~ 70°C.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: LM393MX and most substitutes carry MSL 1 (Unlimited), requiring no special moisture control during storage or assembly. AS393MTR-E1 and AS393MTR-G1 carry MSL 3 (168 Hours), requiring baking and controlled humidity handling per IPC-A-610 standards before reflow soldering.

Q: Can LM2903DR (UMW) be used as a substitute despite the different supply voltage range?

A: LM2903DR specifies 2V ~ 30V (single) versus LM393MX at 2V ~ 36V. This represents a reduced maximum supply voltage ceiling. Substitution is valid only for applications operating within the 2V ~ 30V range. Designs requiring operation above 30V require alternative parts.

Q: Are all substitute parts available in Cut Tape (CT) and Digi-Reel (TR) packaging formats?

A: No. Packaging availability varies by manufacturer and part number. LM393MX/NOPB, AS393MTR-G1, and BA10393F-E2 are available in both CT and Digi-Reel formats. AS393AMTR-E1, AS393AMTR-G1, AS393MTR-E1, BA2903F-E2, and BA2903SF-E2 are available in Tape & Reel format only. Verify packaging availability with your supplier before design finalization.

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