LM293DR2 Equivalent & Substitute Parts

Part Overview

The LM293DR2 is a dual comparator integrated circuit manufactured by onsemi in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The LM293DR2 functions as a general-purpose comparator with open-collector and open-drain output configurations, suitable for applications requiring low-voltage operation across a 2V to 36V supply range.

Key Parameters

Parameter	LM293DR2
Manufacturer	onsemi
Package Type	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 Range (Single/Dual)	2V ~ 36V, ±1V ~ 18V
Input Offset Voltage (Max)	5mV @ 30V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V
Quiescent Current (Max)	2.5mA
Product Status	Obsolete
RoHS Status	RoHS non-compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LM293DR2 is determined by the following critical parameters:

Package Compatibility: 8-SOIC surface mount form factor is the primary constraint for direct substitution without PCB redesign.

Electrical Performance: Supply voltage range (2V ~ 36V), input offset voltage (5mV @ 30V), input bias current (0.25µA @ 5V), output current capability (16mA @ 5V), and quiescent current (2.5mA) define functional equivalence.

Output Configuration: Open-collector and open-drain output types with rail-to-rail capability are required for circuit compatibility.

Compliance Status: RoHS3 compliance is available in active substitute parts, addressing the non-compliant status of the obsolete LM293DR2.

Substitute parts are grouped into three categories:

Direct Substitutes (Same Package): Parts maintaining 8-SOIC packaging with matching electrical specifications and active product status.

Upgrade Substitutes (Same Package, Enhanced Performance): Parts in 8-SOIC packaging with extended operating temperature ranges or improved specifications, suitable for designs requiring higher reliability.

Similar Alternatives (Different Package): Parts with equivalent electrical performance in alternative surface mount packages (8-MSOP, 8-TSSOP, 8-UFSON) or through-hole options, requiring PCB layout modification.

Parameter Comparison

Part Number	Manufacturer	Package	Product Status	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	RoHS Status
LM293DR2	onsemi	8-SOIC	Obsolete	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	Non-compliant
LM293DR2G	onsemi	8-SOIC	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	ROHS3 Compliant
LM293DT	STMicroelectronics	8-SOIC	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-40°C ~ 105°C	ROHS3 Compliant
LM193DT	STMicroelectronics	8-SOIC	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-55°C ~ 125°C	ROHS3 Compliant
AP393AM8G-13	Diodes Incorporated	8-MSOP	Active	2V ~ 36V, ±1V ~ 18V	8mV @ 5V	0.4µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	ROHS3 Compliant
LM193DR	UMW	8-SOIC	Active	2V ~ 32V, ±1V ~ 16V	5mV	250nA	16mA	1mA	-55°C ~ 125°C	ROHS3 Compliant
LM193H	National Semiconductor	TO-99-8	Active	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	-55°C ~ 125°C	Not specified
LM193QT	STMicroelectronics	8-UFSON (2x2)	Active	2V ~ 36V, ±1V ~ 18V	Not specified	Not specified	Not specified	2.5mA	Not specified	ROHS3 Compliant
LM2903AVQDRG4Q1	Texas Instruments	8-SOIC	Active	2V ~ 36V, ±1V ~ 18V	2mV @ 5V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	ROHS3 Compliant
LM2903AVQPWR	Texas Instruments	8-TSSOP	Active	2V ~ 36V, ±1V ~ 18V	2mV @ 5V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	ROHS3 Compliant
LM2903AVQPWRG4Q1	Texas Instruments	8-TSSOP	Active	2V ~ 36V, ±1V ~ 18V	2mV @ 5V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification):

LM293DR2G is the primary direct substitute, maintaining identical 8-SOIC packaging and electrical specifications while providing active product status and ROHS3 compliance. This part is suitable for designs where the original operating temperature range (-25°C ~ 85°C) is acceptable.

LM293DT (STMicroelectronics) and LM193DT (STMicroelectronics) are active alternatives in 8-SOIC packaging with extended operating temperature ranges (-40°C ~ 105°C and -55°C ~ 125°C respectively), providing enhanced reliability for industrial and automotive applications.

LM2903AVQDRG4Q1 (Texas Instruments) in 8-SOIC packaging offers improved input offset voltage (2mV @ 5V) and higher output current capability (20mA), with automotive-grade qualification (AEC-Q100) and extended temperature range (-40°C ~ 125°C).

For PCB Layout Flexibility:

LM2903AVQPWRG4Q1 (Texas Instruments) in 8-TSSOP packaging provides the same electrical performance as LM2903AVQDRG4Q1 with a different footprint, suitable for space-constrained designs.

LM193QT (STMicroelectronics) in 8-UFSON (2x2) packaging offers the smallest footprint option while maintaining 8-SOIC electrical compatibility, ideal for miniaturized applications.

For Through-Hole Applications:

LM193H (National Semiconductor) in TO-99-8 metal can packaging is available for designs requiring through-hole mounting, with extended operating temperature range (-55°C ~ 125°C).

For Supply Voltage Constraints:

LM193DR (UMW) operates within a slightly reduced supply voltage range (2V ~ 32V, ±1V ~ 16V) compared to the original specification, suitable for applications not requiring the full 36V upper limit.

All recommended substitutes maintain the dual-comparator configuration, open-collector/open-drain output types, and rail-to-rail capability of the original LM293DR2.

Frequently Asked Questions (FAQ)

Q: Can LM293DR2G be used as a direct replacement for LM293DR2?

A: Yes. LM293DR2G maintains identical 8-SOIC packaging, electrical specifications, and functional performance. The primary difference is active product status and ROHS3 compliance, making it the preferred direct substitute for obsolete LM293DR2 inventory.

Q: What is the difference between LM293DT and LM193DT?

A: Both are STMicroelectronics comparators in 8-SOIC packaging with identical electrical specifications. LM193DT extends the operating temperature range to -55°C ~ 125°C, compared to LM293DT at -40°C ~ 105°C. Selection depends on application temperature requirements.

Q: Can I use LM2903AVQPWRG4Q1 instead of LM293DR2?

A: LM2903AVQPWRG4Q1 is electrically compatible but uses 8-TSSOP packaging instead of 8-SOIC, requiring PCB layout modification. It offers improved specifications (2mV input offset, 20mA output current) and automotive-grade qualification (AEC-Q100).

Q: What are the package differences between 8-SOIC, 8-MSOP, and 8-TSSOP?

A: 8-SOIC (0.154" width) is the original package. 8-MSOP (0.118" width) and 8-TSSOP (0.173" width) are alternative surface mount packages with different footprints and pin spacing. Each requires specific PCB design accommodation.

Q: Is LM193H suitable for surface mount applications?

A: No. LM193H uses TO-99-8 metal can through-hole packaging. It is suitable only for through-hole PCB designs. For surface mount applications, select from 8-SOIC, 8-MSOP, 8-TSSOP, or 8-UFSON packaged alternatives.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. The original LM293DR2 is non-compliant. All active substitutes listed are ROHS3 compliant, suitable for modern manufacturing and environmental standards.

Q: Can I use AP393AM8G-13 in place of LM293DR2?

A: AP393AM8G-13 is functionally compatible but uses 8-MSOP packaging and has a reduced operating temperature range (0°C ~ 70°C). It is suitable only for commercial-grade applications where the narrower temperature range is acceptable and PCB layout modification is feasible.

Q: What is the significance of the input offset voltage difference between LM293DR2 and LM2903AVQDRG4Q1?

A: LM293DR2 specifies 5mV input offset at 30V, while LM2903AVQDRG4Q1 specifies 2mV at 5V. The lower offset voltage in LM2903AVQDRG4Q1 provides improved precision for applications requiring tighter comparator thresholds, though both are suitable for general-purpose comparator functions.

Q: Are all listed substitutes available in the same inventory quantities?

A: No. Inventory levels vary significantly. LM2903AVQPWRG4Q1 has the highest inventory (933,868 pcs), while LM193H has the lowest (1,886 pcs). Procurement planning should account for availability differences when selecting substitutes.

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