LM293DG Equivalent & Substitute Parts

Part Overview

The LM293DG is a general-purpose dual comparator IC manufactured by onsemi in 8-SOIC surface-mount packaging. This device features open-collector and open-drain outputs with rail-to-rail capability, operating across a supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). The LM293DG is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Active alternatives from major manufacturers provide identical or enhanced electrical performance while maintaining full pin and functional compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM293DG
Manufacturer	onsemi
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Number of Elements	2
Output Type	Open-Collector, Open-Drain, 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	-25°C ~ 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the LM293DG is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Package type: 8-SOIC surface-mount only
Number of comparator elements: 2
Output configuration: Open-Collector, Open-Drain, or Rail-to-Rail capability
Supply voltage range: 2V ~ 36V (single) or ±1V ~ 18V (dual)
Input offset voltage: 5mV or lower @ 30V
Input bias current: 0.25µA or lower @ 5V
Output current: 16mA or higher @ 5V
Quiescent current: 2.5mA or lower
Operating temperature: Must support at least -25°C to 85°C minimum
RoHS3 compliance required

Substitute parts are categorized as follows:

Direct Substitutes: Identical electrical specifications and base part number (LM293 series) with active product status and equivalent or superior performance metrics.

Upgrade Substitutes: Enhanced temperature range or improved electrical characteristics while maintaining full functional compatibility and identical pinout.

Similar Alternatives: Different manufacturer base part numbers (AS393, AP393, LM193 series) meeting all critical electrical and mechanical parameters with compatible 8-SOIC packaging.

Parameter Comparison

Part Number	Manufacturer	Product Status	Supply Voltage	Input Offset (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Package
LM293DG	onsemi	Obsolete	2V~36V, ±1V~18V	5mV @ 30V	16mA @ 5V	2.5mA	-25°C ~ 85°C	8-SOIC
LM293DR2G	onsemi	Active	2V~36V, ±1V~18V	5mV @ 30V	16mA @ 5V	2.5mA	-25°C ~ 85°C	8-SOIC
LM293ADR	Texas Instruments	Active	2V~36V, ±1V~18V	2mV @ 30V	20mA	2.5mA	-25°C ~ 85°C	8-SOIC
LM293DRG3	Texas Instruments	Active	2V~36V, ±1V~18V	5mV @ 30V	20mA	2.5mA	-25°C ~ 85°C	8-SOIC
LM193DT	STMicroelectronics	Active	2V~36V, ±1V~18V	5mV @ 30V	18mA @ 5V	2.5mA	-55°C ~ 125°C	8-SOIC
LM293DT	STMicroelectronics	Active	2V~36V, ±1V~18V	5mV @ 30V	18mA @ 5V	2.5mA	-40°C ~ 105°C	8-SOIC
LM293MDREP	Texas Instruments	Active	2V~36V, ±1V~18V	5mV @ 30V	20mA	2.5mA	-55°C ~ 125°C	8-SOIC
AS393MTR-E1	Diodes Incorporated	Active	2V~36V, ±1V~18V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC
AS393AMTR-E1	Diodes Incorporated	Active	2V~36V, ±1V~18V	3mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC
AS393AMTR-G1	Diodes Incorporated	Active	2V~36V, ±1V~18V	3mV @ 1.4V	16mA	1mA	-40°C ~ 85°C	8-SOIC
AP393ASG-13	Diodes Incorporated	Active	2V~36V, ±1V~18V	8mV @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC

Engineering Selection Recommendations

Primary Recommendation - Direct Substitutes:

LM293DR2G (onsemi) is the direct replacement for LM293DG, offering identical electrical specifications and active product status with high inventory availability (305,300 units). This part maintains full compatibility with existing designs without any circuit modifications.

Secondary Recommendations - Enhanced Performance:

LM293ADR (Texas Instruments) and LM293DRG3 (Texas Instruments) provide superior input offset voltage performance (2mV and 5mV respectively) and increased output current capability (20mA), while maintaining identical supply voltage ranges and quiescent current specifications. Both are active products with substantial inventory.

LM293MDREP (Texas Instruments) extends the operating temperature range to -55°C ~ 125°C with improved output current (20mA), suitable for applications requiring extended temperature performance.

LM293DT (STMicroelectronics) offers two temperature variants: standard (-40°C ~ 105°C) and extended (-55°C ~ 125°C), with improved output current (18mA) and active product status.

Alternative Selections - Different Manufacturers:

AS393MTR-E1, AS393AMTR-E1, and AS393AMTR-G1 (Diodes Incorporated) meet all critical electrical parameters with reduced quiescent current (1mA) and improved input offset voltage specifications. These parts are fully compatible with 8-SOIC pinout requirements.

AP393ASG-13 (Diodes Incorporated) meets core electrical specifications but operates within a narrower temperature range (0°C ~ 70°C), suitable only for commercial-grade applications.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and MSL ratings compatible with standard manufacturing processes. Moisture sensitivity levels range from MSL 1 (unlimited) to MSL 3 (168 hours), with MSL 1 parts preferred for extended shelf storage.

Frequently Asked Questions (FAQ)

Q: Can LM293DR2G directly replace LM293DG without circuit modifications?

A: Yes. LM293DR2G is a direct substitute with identical electrical specifications, pinout, and package configuration. No circuit modifications are required. The primary difference is product status: LM293DR2G is active with high inventory availability.

Q: What is the difference between LM293ADR and LM293DRG3?

A: Both are Texas Instruments LM293 series comparators in 8-SOIC packaging. LM293ADR features superior input offset voltage (2mV @ 30V) compared to LM293DRG3 (5mV @ 30V). Both provide 20mA output current and identical supply voltage ranges. Selection depends on application offset voltage requirements.

Q: Are AS393 series parts fully compatible with LM293DG?

A: AS393 series parts (AS393MTR-E1, AS393AMTR-E1, AS393AMTR-G1) meet all critical electrical and mechanical parameters for LM293DG substitution. They feature identical 8-SOIC packaging, dual comparator configuration, and compatible supply voltage ranges. The primary differences are reduced quiescent current (1mA vs 2.5mA) and improved input offset voltage specifications, which represent performance enhancements.

Q: Which substitute offers the widest operating temperature range?

A: LM193DT and LM293MDREP both support -55°C ~ 125°C operating temperature, compared to LM293DG's -25°C ~ 85°C range. These parts are suitable for industrial and extended-temperature applications.

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

A: MSL ratings indicate maximum shelf storage duration before moisture absorption requires baking. MSL 1 (unlimited) parts like LM293DR2G and AS393 series have no time restrictions. MSL 3 (168 hours) parts like AP393ASG-13 require baking if stored beyond 168 hours in standard conditions. For production planning, MSL 1 parts offer greater flexibility.

Q: Can I use AP393ASG-13 in applications requiring -25°C operation?

A: No. AP393ASG-13 operates within 0°C ~ 70°C range, which does not meet the -25°C minimum requirement of LM293DG. This part is suitable only for commercial-grade applications within its specified temperature range.

Q: What packaging formats are available for LM293 substitutes?

A: All recommended substitutes are available in 8-SOIC surface-mount packaging. Packaging options vary by supplier: onsemi and Texas Instruments offer Cut Tape (CT) and Digi-Reel formats; Diodes Incorporated provides Tape & Reel (TR) packaging. Verify packaging availability with your supplier for production requirements.

Q: Are there any electrical performance trade-offs when switching from LM293DG to AS393 series?

A: AS393 series parts provide performance improvements: reduced quiescent current (1mA vs 2.5mA) and lower input offset voltage (3-5mV vs 5mV). These represent enhancements with no negative trade-offs for standard comparator applications. Operating temperature range is -40°C ~ 85°C, which covers the LM293DG range.

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