LM393DG Equivalent & Substitute Parts

Part Overview

The LM393DG is a dual general-purpose comparator manufactured by onsemi, featuring open-collector, rail-to-rail output configuration in an 8-SOIC surface-mount package. This device operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), making it suitable for analog signal comparison applications in industrial and consumer electronics.

The LM393DG is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access active production alternatives with comparable or enhanced electrical characteristics.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393DG
Manufacturer	onsemi
Category	Linear
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
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LM393DG are classified based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Package compatibility: 8-SOIC form factor (0.154", 3.90mm Width)
Output type: Open-Collector or Open-Collector/Open-Drain configuration
Supply voltage range: 2V ~ 36V (single) or ±1V ~ ±18V (dual)
Input offset voltage: 5mV maximum @ specified test conditions
Input bias current: 0.25µA maximum @ 5V
Quiescent current: 2.5mA maximum
Number of elements: 2 comparators per package

Upgrade Parts (Active Status): Parts meeting all primary criteria with active product status and enhanced operating temperature ranges or improved output current specifications.

Similar Parts (Alternative Compatibility): Parts meeting core electrical criteria but with minor parameter variations (output type extensions, different input offset specifications, or alternative operating temperature ranges) that may require application-level verification.

Parameter Comparison

Part Number	Manufacturer	Status	Package	Output Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range
LM393DG	onsemi	Obsolete	8-SOIC	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C
LM193DT	STMicroelectronics	Active	8-SOIC	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-55°C ~ 125°C
LM293D	STMicroelectronics	Active	8-SOIC	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-40°C ~ 105°C
LM293DR	Texas Instruments	Active	8-SOIC	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-25°C ~ 85°C
LM293DRG3	Texas Instruments	Active	8-SOIC	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-25°C ~ 85°C
LM293DT	STMicroelectronics	Active	8-SOIC	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-40°C ~ 105°C
LM293MDREP	Texas Instruments	Active	8-SOIC	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-55°C ~ 125°C
AP393ASG-13	Diodes Incorporated	Active	8-SOIC	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~36V, ±1V~18V	8mV @ 5V	0.4µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C
AS393AMTR-E1	Diodes Incorporated	Active	8-SOIC	Open-Collector	2V~36V, ±1V~18V	3mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C
AS393AMTR-G1	Diodes Incorporated	Active	8-SOIC	Open-Collector	2V~36V, ±1V~18V	3mV @ 1.4V	0.4µA @ 5V	16mA	1mA	-40°C ~ 85°C

Engineering Selection Recommendations

For Direct Replacement (Highest Compatibility):

LM193DT (STMicroelectronics) and LM293DT (STMicroelectronics) are the primary upgrade options. Both maintain identical electrical specifications to the LM393DG while offering active product status and extended operating temperature ranges. LM193DT provides the narrowest temperature specification (-55°C to 125°C), while LM293DT extends to -40°C to 105°C. Both are RoHS3 compliant and carry REACH Unaffected status.

For Extended Temperature Applications:

LM293MDREP (Texas Instruments) offers the widest operating temperature range (-55°C to 125°C) with active status and RoHS3 compliance. Output current is specified at 20mA typical, providing improved drive capability compared to the original 16mA specification.

For Cost-Optimized Selection:

LM293DR and LM293DRG3 (Texas Instruments) both deliver active status with 20mA typical output current and RoHS3 compliance. Operating temperature range is -25°C to 85°C, suitable for standard industrial applications.

For Alternative Compatibility:

AS393AMTR-E1 (Diodes Incorporated) provides superior input offset voltage (3mV @ 5V) and reduced quiescent current (1mA), with active status and RoHS3 compliance. Operating temperature range is -40°C to 85°C. This part is suitable where lower power consumption is a design requirement.

All recommended parts maintain the 8-SOIC package form factor and core electrical specifications required for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can LM293D replace LM393DG directly?

A: Yes. LM293D maintains identical supply voltage range (2V~36V, ±1V~18V), input offset voltage (5mV @ 30V), input bias current (0.25µA @ 5V), and quiescent current (2.5mA). The output type includes Open-Drain in addition to Open-Collector and Rail-to-Rail, which does not affect compatibility. Operating temperature range extends to -40°C to 105°C. The part is active and RoHS3 compliant.

Q: What is the difference between LM293DR and LM293DRG3?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications: 2V~36V supply voltage, 5mV input offset, 0.25µA input bias, and 20mA typical output current. Both operate from -25°C to 85°C and are RoHS3 compliant. The primary difference is packaging: LM293DR is supplied in Cut Tape (CT) & Digi-Reel format, while LM293DRG3 is supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements.

Q: Is AS393AMTR-E1 a suitable substitute?

A: AS393AMTR-E1 is compatible for applications where lower quiescent current (1mA vs. 2.5mA) and superior input offset voltage (3mV @ 5V vs. 5mV @ 30V) provide design advantages. The part maintains the 8-SOIC package and 2V~36V supply range. Operating temperature is -40°C to 85°C. This part is suitable for battery-powered or low-power applications but requires verification that the narrower temperature range meets system requirements.

Q: Why does AP393ASG-13 have different input offset and bias specifications?

A: AP393ASG-13 (Diodes Incorporated) specifies input offset voltage at 8mV @ 5V and input bias current at 0.4µA @ 5V, compared to the LM393DG baseline of 5mV @ 30V and 0.25µA @ 5V. These variations reflect different test conditions and manufacturing process. The part remains functionally compatible within the 8-SOIC package and 2V~36V supply range but should be selected only when application tolerance permits the higher offset and bias specifications.

Q: What is the significance of RoHS3 compliance?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All active substitute parts listed carry RoHS3 compliance, ensuring compatibility with modern manufacturing and environmental standards. The obsolete LM393DG does not carry this certification.

Q: Can I use LM193DT in place of LM293DT?

A: Yes, with consideration of output type specification. LM193DT specifies Open-Collector and Rail-to-Rail output, while LM293DT adds Open-Drain capability. Both maintain identical supply voltage, input offset, input bias, and quiescent current specifications. LM193DT operates from -55°C to 125°C, providing the widest temperature range. Selection depends on whether the application requires Open-Drain output capability.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts are supplied in 8-SOIC surface-mount package with 0.154" (3.90mm) width, ensuring mechanical compatibility. However, packaging formats differ: some are supplied in Cut Tape (CT) & Digi-Reel, others in Tape & Reel (TR), and some in Tube format. Verify packaging format matches your assembly process requirements before procurement.

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