LM393DMR2 Equivalent & Substitute Parts

Part Overview

The LM393DMR2 is a dual general-purpose comparator manufactured by onsemi in 8-MSOP surface-mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The LM393 base product remains widely available across multiple manufacturers and package options, enabling straightforward substitution based on electrical and mechanical compatibility.

Key Parameters

Parameter	LM393DMR2
Manufacturer	onsemi
Base Product Number	LM393
Package Type	8-MSOP
Product Status	Obsolete
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage Supply Range	2V ~ 36V (Single), ±1V ~ 18V (Dual)
Input Offset Voltage (Max)	5mV @ 30V
Input Bias Current (Max)	0.25µA @ 5V
Quiescent Current (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
RoHS Status	RoHS non-compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM393DMR2 is determined by the following criteria:

Electrical Compatibility: All substitute parts must maintain the same dual-comparator architecture with identical output type (Open-Collector, Rail-to-Rail), supply voltage range (2V ~ 36V single, ±1V ~ 18V dual), and maximum input offset voltage (5mV @ 30V). Input bias current and quiescent current specifications must not exceed the original part limits.

Mechanical Compatibility: Package type determines physical substitution capability. The LM393DMR2 uses 8-MSOP (0.118", 3.00mm width) surface-mount packaging. Direct pin-compatible substitutes use identical or functionally equivalent packages (8-MSOP, 8-TSSOP, 8-MiniSO). Through-hole alternatives (TO-99-8, 8-UFSON) require PCB redesign.

Product Status & Compliance: Active product status ensures ongoing availability and manufacturing support. RoHS3 compliance is preferred for new designs but not mandatory for legacy system maintenance. MSL rating of 1 (Unlimited) matches the original part's moisture sensitivity classification.

Temperature Range Considerations: The original part operates 0°C ~ 70°C. Substitutes with extended temperature ranges (-40°C ~ 105°C) provide enhanced reliability for industrial applications but are not required for direct replacement in commercial-grade designs.

Parameter Comparison

Part Number	Manufacturer	Package	Product Status	Output Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Quiescent Current (Max)	Operating Temp	RoHS Status	MSL
LM393DMR2	onsemi	8-MSOP	Obsolete	Open-Collector, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	2.5mA	0°C ~ 70°C	RoHS non-compliant	1
LM393DMR2G	onsemi	8-MSOP	Active	Open-Collector, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	2.5mA	0°C ~ 70°C	ROHS3 Compliant	1
LM393PT	STMicroelectronics	8-TSSOP	Active	Open-Collector, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	2.5mA	0°C ~ 70°C	ROHS3 Compliant	1
LM393ST	STMicroelectronics	8-MiniSO	Active	Open-Collector, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	2.5mA	0°C ~ 70°C	ROHS3 Compliant	1
LM293PT	STMicroelectronics	8-TSSOP	Active	Open-Collector, Open-Drain, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	2.5mA	-40°C ~ 105°C	ROHS3 Compliant	1
LM293ST	STMicroelectronics	8-MiniSO	Active	Open-Collector, Open-Drain, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	2.5mA	-40°C ~ 105°C	ROHS3 Compliant	1
AP393ASG-13	Diodes Incorporated	8-SOP	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V ~ 36V, ±1V ~ 18V	8mV @ 5V	0.4µA @ 5V	2.5mA	0°C ~ 70°C	ROHS3 Compliant	3
AP393SG-13	Diodes Incorporated	8-SOP	Active	Open-Collector	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	0.25µA @ 5V	2.5mA	0°C ~ 70°C	ROHS3 Compliant	3
LM193AH/NOPB	Texas Instruments	TO-99-8	Active	Open-Collector, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	2mV @ 30V	0.1µA @ 5V	2.5mA	-55°C ~ 125°C	ROHS3 Compliant	1
LM193H/NOPB	Texas Instruments	TO-99-8	Active	Open-Collector, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.1µA @ 5V	2.5mA	-55°C ~ 125°C	ROHS3 Compliant	1
LM193QT	STMicroelectronics	8-UFSON (2x2)	Active	Open-Collector, Rail-to-Rail	2V ~ 36V, ±1V ~ 18V	Not specified	Not specified	2.5mA	Not specified	ROHS3 Compliant	1

Engineering Selection Recommendations

Direct Surface-Mount Replacement (Preferred): LM393DMR2G (onsemi) provides identical electrical performance and package compatibility with active product status and RoHS3 compliance. This is the primary substitute for direct PCB replacement without layout modification.

Alternative Surface-Mount Options: LM393PT and LM393ST (STMicroelectronics) maintain full electrical equivalence with different surface-mount packages (8-TSSOP and 8-MiniSO respectively). Both are active products with RoHS3 compliance. Package selection depends on PCB footprint availability and manufacturing capability.

Extended Temperature Range Substitutes: LM293PT and LM293ST (STMicroelectronics) provide identical electrical performance with extended operating temperature range (-40°C ~ 105°C) suitable for industrial or automotive applications. These parts use the LM293 base product number and include Open-Drain output capability in addition to Open-Collector.

Alternative Manufacturer Options: AP393SG-13 (Diodes Incorporated) matches electrical specifications with 8-SOP packaging and active product status. AP393ASG-13 offers broader output type compatibility but with slightly higher input offset voltage (8mV @ 5V) and input bias current (0.4µA @ 5V).

Through-Hole Alternatives: LM193AH/NOPB and LM193H/NOPB (Texas Instruments) provide equivalent functionality in TO-99-8 metal can packages for through-hole applications. These require PCB redesign but offer extended temperature range (-55°C ~ 125°C) and superior input offset voltage specifications (2mV @ 30V for LM193AH/NOPB).

Compact Package Option: LM193QT (STMicroelectronics) in 8-UFSON (2x2) package provides the smallest footprint for space-constrained applications while maintaining electrical compatibility and active product status.

Frequently Asked Questions (FAQ)

Q: Can LM393DMR2G be used as a direct replacement for LM393DMR2?

A: Yes. LM393DMR2G is electrically and mechanically identical to LM393DMR2, with the primary difference being active product status and RoHS3 compliance. Both use 8-MSOP packaging and share identical electrical specifications. No PCB modification is required.

Q: What is the difference between LM393 and LM293 series comparators?

A: The LM293 series extends the operating temperature range to -40°C ~ 105°C and adds Open-Drain output capability alongside Open-Collector. Electrical performance remains equivalent. LM293 parts are suitable for industrial and automotive applications requiring wider temperature operation.

Q: Are surface-mount packages (8-MSOP, 8-TSSOP, 8-MiniSO) interchangeable?

A: No. While all three are surface-mount packages with identical pin counts and electrical compatibility, they have different physical dimensions and footprints. PCB design must accommodate the specific package selected. 8-MSOP (0.118" width) and 8-MiniSO are similar in size; 8-TSSOP (0.173" width) is wider.

Q: Can through-hole packages (TO-99-8) replace surface-mount versions?

A: No. Through-hole and surface-mount packages require different PCB layouts and assembly processes. Substitution between these package types requires PCB redesign. However, LM193AH/NOPB and LM193H/NOPB provide electrical equivalence for through-hole applications.

Q: What does MSL rating mean, and why is it important?

A: MSL (Moisture Sensitivity Level) indicates how sensitive a component is to moisture absorption during storage and handling. MSL 1 (Unlimited) means the part has no moisture sensitivity restrictions and can be stored indefinitely without special precautions. MSL 3 (168 Hours) requires controlled storage conditions. The LM393DMR2 and most substitutes carry MSL 1 rating.

Q: Is RoHS3 compliance required for substitution?

A: RoHS3 compliance is not mandatory for direct electrical substitution but is preferred for new designs and systems targeting European markets. The original LM393DMR2 is RoHS non-compliant; however, all active substitutes listed are RoHS3 compliant, making them suitable for modern manufacturing and regulatory requirements.

Q: Which substitute offers the best input offset voltage specification?

A: LM193AH/NOPB (Texas Instruments) provides the lowest maximum input offset voltage at 2mV @ 30V, compared to 5mV @ 30V for the original LM393DMR2. This superior specification may be beneficial for precision measurement applications, though it requires through-hole PCB redesign.

Q: Can AP393SG-13 replace LM393DMR2 in all applications?

A: AP393SG-13 maintains electrical compatibility with identical supply voltage range and quiescent current. However, it has slightly higher input offset voltage (5mV @ 5V vs. 5mV @ 30V) and input bias current (0.25µA @ 5V). The 8-SOP package differs from 8-MSOP, requiring PCB footprint verification. MSL rating is 3 instead of 1, requiring controlled storage conditions.

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