LM393DR2 Equivalent & Substitute Parts

Part Overview

The LM393DR2 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 LM393DR2 operates as a general-purpose comparator with open-collector, rail-to-rail output configuration, suitable for applications requiring voltage comparison across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply).

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393DR2
Manufacturer	onsemi
Category	Linear
Type	Comparator
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
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM393DR2 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

Number of Elements: 2 (dual comparator configuration)
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
Package / Case: 8-SOIC or compatible surface mount package
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Direct Substitutes meet all electrical parameters and use identical 8-SOIC packaging with surface mount mounting type.

Upgrade Substitutes meet all electrical parameters but offer extended operating temperature ranges (-55°C to 125°C or -40°C to 105°C) compared to the original 0°C to 70°C specification, providing improved reliability for wider temperature applications.

Similar Substitutes meet core electrical parameters but may have minor variations in specific characteristics (input offset voltage, output current, operating temperature) or use alternative surface mount packages (8-SOP, 8-MSOP, 8-DSBGA, TO-99-8) suitable for different PCB layouts and thermal requirements.

Parameter Comparison

Part Number	Manufacturer	Output Type	Voltage - Supply (V)	Input Offset Max (mV)	Input Bias Max (µA)	Output Current Typ (mA)	Quiescent Max (mA)	Operating Temp (°C)	Package	Product Status	RoHS Status
LM393DR2	onsemi	Open-Collector, Rail-to-Rail	2-36, ±1-18	5 @ 30V	0.25 @ 5V	16 @ 5V	2.5	0 ~ 70	8-SOIC	Obsolete	RoHS non-compliant
LM393DR2G	onsemi	Open-Collector, Rail-to-Rail	2-36, ±1-18	5 @ 30V	0.25 @ 5V	16 @ 5V	2.5	0 ~ 70	8-SOIC	Active	ROHS3 Compliant
LM193DT	STMicroelectronics	Open-Collector, Rail-to-Rail	2-36, ±1-18	5 @ 30V	0.25 @ 5V	18 @ 5V	2.5	-55 ~ 125	8-SOIC	Active	ROHS3 Compliant
LM293DT	STMicroelectronics	Open-Collector, Open-Drain, Rail-to-Rail	2-36, ±1-18	5 @ 30V	0.25 @ 5V	18 @ 5V	2.5	-40 ~ 105	8-SOIC	Active	ROHS3 Compliant
AP393ASG-13	Diodes Incorporated	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2-36, ±1-18	8 @ 5V	0.4 @ 5V	16 @ 5V	2.5	0 ~ 70	8-SOP	Active	ROHS3 Compliant
LM193AH	Texas Instruments	Open-Collector, Rail-to-Rail	2-36, ±1-18	2 @ 30V	0.1 @ 5V	16 @ 5V	2.5	-55 ~ 125	TO-99-8	Active	ROHS3 Compliant
LM193H/NOPB	Texas Instruments	Open-Collector, Rail-to-Rail	2-36, ±1-18	5 @ 30V	0.1 @ 5V	16 @ 5V	2.5	-55 ~ 125	TO-99-8	Active	ROHS3 Compliant
LM2903AVQDRG4Q1	Texas Instruments	Open-Collector, Rail-to-Rail	2-36, ±1-18	2 @ 5V	0.25 @ 5V	20	2.5	-40 ~ 125	8-SOIC	Active	ROHS3 Compliant
LM2903DGKR	Rohm Semiconductor	Open-Collector, Rail-to-Rail	2-36, ±1-18	7 @ 5V	0.25 @ 5V	16 @ 5V	2.5	-40 ~ 125	8-MSOP	Active	ROHS3 Compliant
LM2903DT	STMicroelectronics	Open-Collector, Rail-to-Rail	2-36, ±1-18	7 @ 5V	0.25 @ 5V	16 @ 5V	2.5	-40 ~ 125	8-SOIC	Active	ROHS3 Compliant
LM2903ITL/NOPB	Texas Instruments	Open-Collector, Rail-to-Rail	2-36, ±1-18	7 @ 30V	0.25 @ 5V	16 @ 5V	2.5	-40 ~ 85	8-DSBGA	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications and Compliance): LM393DR2G from onsemi is the primary direct substitute. It maintains identical electrical parameters and 8-SOIC packaging while offering active product status and ROHS3 compliance, addressing the obsolescence and RoHS non-compliance issues of the original LM393DR2.

For Extended Temperature Range Applications: LM193DT (STMicroelectronics) and LM193AH (Texas Instruments) provide -55°C to 125°C operating temperature range with identical supply voltage and output specifications. These parts are suitable for industrial and automotive temperature environments where the original 0°C to 70°C range is insufficient.

For Automotive-Grade Applications: LM2903AVQDRG4Q1 (Texas Instruments) carries AEC-Q100 automotive qualification with -40°C to 125°C operating range and improved input offset voltage (2mV @ 5V), meeting automotive reliability standards.

For Alternative Package Geometries: LM2903DGKR (Rohm Semiconductor, 8-MSOP package) and LM2903ITL/NOPB (Texas Instruments, 8-DSBGA package) provide functionally equivalent performance in compact surface mount packages for space-constrained PCB layouts.

For Through-Hole Applications: LM193AH and LM193H/NOPB (Texas Instruments, TO-99-8 metal can package) are suitable for through-hole mounting requirements while maintaining electrical equivalence.

All recommended substitutes carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, eliminating procurement and environmental compliance concerns associated with the obsolete LM393DR2.

Frequently Asked Questions (FAQ)

Q: Can LM393DR2G be used as a direct replacement for LM393DR2? A: Yes. LM393DR2G maintains identical electrical parameters, supply voltage range (2V-36V, ±1V-18V), output type (Open-Collector, Rail-to-Rail), and 8-SOIC packaging. The primary differences are active product status and ROHS3 compliance.

Q: What is the difference between LM193DT and LM293DT? A: Both parts share identical supply voltage, input offset, input bias, and quiescent current specifications. LM293DT includes Open-Drain output capability in addition to Open-Collector and Rail-to-Rail, and operates across -40°C to 105°C. LM193DT operates across -55°C to 125°C. Selection depends on required temperature range and output configuration needs.

Q: Why do some substitutes have different input offset voltage specifications? A: Input offset voltage varies by manufacturer process and temperature measurement point. LM193AH specifies 2mV @ 30V, while LM393DR2 specifies 5mV @ 30V. Both values remain within acceptable comparator tolerances for most applications. Verify specific application requirements before selection.

Q: Can I use LM2903DGKR (8-MSOP package) instead of 8-SOIC? A: Yes, if PCB layout permits. LM2903DGKR provides identical electrical performance and operating temperature range (-40°C to 125°C) in a more compact 8-MSOP package. Verify PCB footprint compatibility and thermal requirements before substitution.

Q: Are all substitute parts RoHS compliant? A: Yes. All recommended substitutes carry ROHS3 compliance status, eliminating environmental and regulatory concerns associated with the RoHS non-compliant LM393DR2.

Q: What is the significance of MSL 1 (Unlimited) rating? A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed substitutes maintain this rating, ensuring consistent handling and storage procedures without special moisture control measures.

Q: Can LM193AH (TO-99-8 through-hole package) replace LM393DR2 (8-SOIC surface mount)? A: Electrically yes, but requires PCB redesign. LM193AH provides equivalent performance with extended temperature range (-55°C to 125°C) but uses through-hole mounting. Select only if PCB layout supports through-hole components.

Q: Which substitute offers the best input offset voltage performance? A: LM193AH and LM2903AVQDRG4Q1 both specify 2mV input offset voltage, superior to the original LM393DR2 specification of 5mV @ 30V. These parts are preferred for precision voltage comparison applications.

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