LM2903DMR2 Equivalent & Substitute Parts

Part Overview

The LM2903DMR2 is a dual comparator IC manufactured by onsemi in 8-MICRO packaging. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The LM2903 series represents a general-purpose comparator platform with multiple manufacturer implementations and package variants available in active production status.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2903DMR2
Manufacturer	onsemi
Category	Linear
Description	IC COMP DUAL OFFSET LV 8-MICRO
Detailed Description	Comparator
Product Status	Obsolete
Base Product Number	LM2903
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0001

Substitute Part Grouping Explanation

Substitution of the LM2903DMR2 is determined by the following electrical and mechanical criteria:

Electrical Compatibility Parameters:

Dual comparator configuration (2 elements)
Supply voltage range: 2V ~ 36V single supply or ±1V ~ 18V dual supply
Output type: Open-Collector, Rail-to-Rail
Input offset voltage: maximum 8mV at specified conditions
Input bias current: maximum 0.4µA at specified conditions
Output current: 16mA to 20mA typical
Quiescent current: maximum 2.5mA
Operating temperature range: -40°C to 125°C (extended range preferred for industrial applications)

Mechanical Compatibility Parameters:

Package type: 8-pin surface mount or through-hole variants
Mounting type: Surface Mount (MSOP, TSSOP, SOIC) or Through Hole (TO-99)
MSL rating: 1 (Unlimited) preferred for compatibility with existing supply chain processes

Compliance Parameters:

RoHS3 compliance required for new designs
AEC-Q100 qualification available for automotive applications

Substitute parts must maintain functional equivalence across these parameters while offering active production status and improved compliance posture.

Parameter Comparison

Part Number	Manufacturer	Product Status	Package Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current	Operating Temp	RoHS Status	MSL
LM2903DMR2	onsemi	Obsolete	8-MICRO	2V~36V / ±1V~18V	—	—	—	—	Non-compliant	1
LM2903DMR2G	onsemi	Active	8-MSOP	2V~36V / ±1V~18V	7mV @ 30V	0.25µA @ 5V	16mA @ 5V	-40°C ~ 105°C	ROHS3 Compliant	1
LM2903WYPT	STMicroelectronics	Active	8-TSSOP	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	-40°C ~ 125°C	ROHS3 Compliant	1
AP393ASG-13	Diodes Incorporated	Active	8-SOP	2V~36V / ±1V~18V	8mV @ 5V	0.4µA @ 5V	16mA @ 5V	0°C ~ 70°C	ROHS3 Compliant	3
AP393SG-13	Diodes Incorporated	Active	8-SOP	2V~36V / ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA	0°C ~ 70°C	ROHS3 Compliant	3
LM193AH	Texas Instruments	Active	TO-99-8	2V~36V / ±1V~18V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	-55°C ~ 125°C	ROHS3 Compliant	1
LM193DR	UMW	Active	8-SOP	2V~32V / ±1V~16V	5mV	250nA	16mA	-55°C ~ 125°C	ROHS3 Compliant	1
LM193H/NOPB	Texas Instruments	Active	TO-99-8	2V~36V / ±1V~18V	5mV @ 30V	0.1µA @ 5V	16mA @ 5V	-55°C ~ 125°C	ROHS3 Compliant	1
LM193QT	STMicroelectronics	Active	8-UFSON	2V~36V / ±1V~18V	—	—	—	—	ROHS3 Compliant	1
LM2903AVQPWRQ1	Texas Instruments	Active	8-TSSOP	2V~36V / ±1V~18V	2mV @ 5V	0.25µA @ 5V	20mA	-40°C ~ 125°C	ROHS3 Compliant	1
LM2903DGKR	Rohm Semiconductor	Active	8-MSOP	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	-40°C ~ 125°C	ROHS3 Compliant	1

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LM2903DMR2G (onsemi) and LM2903DGKR (Rohm Semiconductor) provide direct functional equivalence as active-production LM2903 variants in surface-mount MSOP packaging. Both maintain identical electrical specifications and MSL-1 rating. LM2903DMR2G operates to 105°C while LM2903DGKR extends to 125°C. Both are ROHS3 compliant.

LM2903WYPT (STMicroelectronics) and LM2903AVQPWRQ1 (Texas Instruments) offer TSSOP packaging with extended temperature range (-40°C to 125°C) and ROHS3 compliance. LM2903AVQPWRQ1 provides automotive-grade qualification (AEC-Q100) and higher output current (20mA typical).

Secondary Substitutes (Package Variant Alternatives):

LM193AH and LM193H/NOPB (Texas Instruments) provide through-hole TO-99-8 packaging for applications requiring traditional mounting. Both support extended temperature range (-55°C to 125°C) and ROHS3 compliance. LM193AH specifies 2mV input offset at 30V, superior to the main part specification.

LM193DR (UMW) offers 8-SOP surface-mount packaging with extended temperature range (-55°C to 125°C) and reduced quiescent current (1mA maximum).

Compliance-Constrained Alternatives:

AP393ASG-13 and AP393SG-13 (Diodes Incorporated) are functionally compatible but carry MSL-3 rating (168 hours) and narrower operating temperature range (0°C to 70°C). These are suitable only for non-critical applications where MSL-3 handling is acceptable.

LM193QT (STMicroelectronics) provides ultra-compact 8-UFSON packaging with MSL-1 rating and ROHS3 compliance, suitable for space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can LM2903DMR2 be directly replaced with LM2903DMR2G?

A: Yes. LM2903DMR2G is the active-production equivalent from the same manufacturer (onsemi) with identical electrical specifications, MSL-1 rating, and ROHS3 compliance. The primary difference is packaging designation (MSOP vs. MICRO) and extended operating temperature to 105°C.

Q: What is the difference between MSOP and TSSOP packaging?

A: MSOP (Micro Small Outline Package) is 0.118" width at 3.00mm, while TSSOP (Thin Shrink Small Outline Package) is 0.173" width at 4.40mm. Both are 8-pin surface-mount packages with identical pin pitch. TSSOP provides slightly larger body dimensions, which may affect PCB layout considerations. Electrical performance is equivalent.

Q: Are automotive-grade variants available?

A: Yes. LM2903WYPT (STMicroelectronics) and LM2903AVQPWRQ1 (Texas Instruments) both carry AEC-Q100 automotive qualification with -40°C to 125°C operating range and ROHS3 compliance.

Q: Why do some substitutes show incomplete electrical specifications?

A: LM193QT specifications are partially unavailable in the provided data. Consult manufacturer datasheets for complete electrical characterization before design implementation.

Q: What is MSL rating and why does it matter?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions (30°C, 85% relative humidity) before soldering. MSL-1 (unlimited) components require no special handling. MSL-3 (168 hours) components require controlled storage and accelerated baking before assembly. The LM2903DMR2 is MSL-1; most active substitutes maintain this rating except AP393 variants (MSL-3).

Q: Can I use LM193 series parts as substitutes for LM2903?

A: Yes, with package considerations. LM193 variants (LM193AH, LM193H/NOPB, LM193DR) are functionally equivalent dual comparators with identical electrical specifications and extended temperature range. LM193 through-hole packages (TO-99-8) require PCB redesign. LM193DR (8-SOP) is a direct surface-mount alternative.

Q: What is the difference between single-supply and dual-supply operation?

A: The LM2903 supports both 2V to 36V single supply and ±1V to ±18V dual supply configurations. Substitutes maintain this dual-mode capability. Circuit design determines which supply configuration is used; component selection does not restrict this choice.

Q: Are there inventory considerations for substitute selection?

A: Yes. LM2903DGKR (Rohm) shows highest inventory (282,900 pcs), followed by LM2903AVQPWRQ1 (Texas Instruments, 108,988 pcs). LM193AH and LM193H/NOPB show lower inventory (1,400-1,654 pcs). Procurement lead times and availability should factor into design decisions.

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