LM2903DRE4 Equivalent & Substitute Parts

Part Overview

The LM2903DRE4 is a dual general-purpose comparator IC manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device features open-collector, rail-to-rail output configuration and operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). The LM2903DRE4 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Active alternatives with identical or superior electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value	Specification Basis
Number of Elements	2	Dual comparator configuration
Output Type	Open-Collector, Rail-to-Rail	Output stage topology
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V	Operating supply range
Voltage - Input Offset (Max)	7mV @ 30V	Input accuracy specification
Current - Input Bias (Max)	0.25µA @ 5V	Input stage current draw
Current - Output (Typ)	20mA	Output drive capability
Current - Quiescent (Max)	2.5mA	Supply current at rest
Operating Temperature	-40°C ~ 125°C	Functional temperature range
Package / Case	8-SOIC (0.154", 3.90mm Width)	Physical form factor
Mounting Type	Surface Mount	PCB assembly method
RoHS Status	ROHS3 Compliant	Environmental compliance
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Handling and storage requirements

Substitute Part Grouping Explanation

Substitution of the LM2903DRE4 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Dual comparator configuration (2 elements)
Open-collector output topology
Supply voltage range: minimum 2V ~ 36V single supply or ±1V ~ 18V dual supply
Input offset voltage: maximum 7mV
Input bias current: maximum 0.25µA @ 5V
Output current capability: minimum 16mA
Quiescent current: maximum 2.5mA
8-SOIC package form factor
Surface-mount technology
Operating temperature range: -40°C to 85°C minimum (extended to 125°C preferred)

Manufacturer Recommended Substitutes (MFR Recommended category) are direct functional replacements with active product status and full Texas Instruments or Diodes Incorporated support. These parts maintain identical electrical specifications and package compatibility.

Parametric Equivalents offer functionally equivalent performance with minor specification variations (such as reduced input offset voltage or improved propagation delay) that do not compromise circuit operation. These parts are suitable for applications where the original specification margins are not critical.

Parameter Comparison

Part Number	Manufacturer	Product Status	Supply Voltage	Input Offset (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Package	Inventory
LM2903DRE4	Texas Instruments	Obsolete	2V~36V, ±1V~18V	7mV @ 30V	20mA	2.5mA	-40°C ~ 125°C	8-SOIC	696 Pcs
LM2903M/NOPB	Texas Instruments	Active	2V~36V, ±1V~18V	7mV @ 30V	16mA @ 5V	2.5mA	-40°C ~ 85°C	8-SOIC	120721 Pcs
LM2903MX/NOPB	Texas Instruments	Active	2V~36V, ±1V~18V	7mV @ 30V	16mA @ 5V	2.5mA	-40°C ~ 85°C	8-SOIC	35100 Pcs
LM2903DR	UMW	Active	2V~30V, ±1V~±15V	5mV @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC	105200 Pcs
LM2903DRG3	Texas Instruments	Active	2V~36V, ±1V~18V	7mV @ 30V	20mA	2.5mA	-40°C ~ 125°C	8-SOIC	3867 Pcs
LM2903DRG4	Texas Instruments	Obsolete	2V~36V, ±1V~18V	7mV @ 30V	20mA	2.5mA	-40°C ~ 125°C	8-SOIC	24473 Pcs
AS393AMTR-E1	Diodes Incorporated	Active	2V~36V, ±1V~18V	3mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC	232200 Pcs
AS393AMTR-G1	Diodes Incorporated	Active	2V~36V, ±1V~18V	3mV @ 1.4V	16mA	1mA	-40°C ~ 85°C	8-SOIC	25475 Pcs
AS393MTR-E1	Diodes Incorporated	Active	2V~36V, ±1V~18V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC	354160 Pcs
AS393MTR-G1	Diodes Incorporated	Active	2V~36V, ±1V~18V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC	300400 Pcs
BA10393F-E2	Rohm Semiconductor	Active	2V~36V, ±1V~18V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOP	105300 Pcs

Engineering Selection Recommendations

Primary Recommendation for Active Designs:

LM2903M/NOPB or LM2903MX/NOPB (Texas Instruments) are the preferred direct replacements. Both maintain identical electrical specifications to the original LM2903DRE4, feature active product status with full manufacturer support, and are available in high inventory quantities. The only specification difference is the reduced operating temperature upper limit (-40°C to 85°C versus -40°C to 125°C), which is acceptable for most commercial and industrial applications. Both parts are ROHS3 compliant with MSL 1 rating.

Alternative Recommendation for Extended Temperature Range:

LM2903DRG3 (Texas Instruments) preserves the full -40°C to 125°C operating temperature range of the original part while maintaining identical electrical specifications. This part is active and suitable for applications requiring extended temperature performance. Inventory availability is lower than the M/MX variants.

Cross-Manufacturer Alternatives:

AS393MTR-E1 or AS393MTR-G1 (Diodes Incorporated) provide functionally equivalent performance with superior specifications in several areas: lower input offset voltage (5mV versus 7mV), reduced quiescent current (1mA versus 2.5mA), and higher inventory availability. These parts are active with ROHS3 compliance. Operating temperature range is -40°C to 85°C. MSL rating is 3 (168 hours) for AS393MTR-E1 and AS393MTR-G1, requiring standard moisture control during storage and handling.

BA10393F-E2 (Rohm Semiconductor) offers equivalent performance with the same electrical and temperature specifications as the Diodes alternatives. The package width is slightly larger (4.40mm versus 3.90mm), which may require PCB layout verification for space-constrained applications.

Parametric Equivalent for Cost-Sensitive Applications:

LM2903DR (UMW) provides parametric equivalence with improved input offset voltage (5mV) and active product status. The supply voltage range is slightly reduced (2V to 30V single supply, ±1V to ±15V dual supply) and operating temperature is limited to 0°C to 70°C. This part is suitable only for applications operating within these narrower specifications.

Frequently Asked Questions (FAQ)

Q: Can I use LM2903M/NOPB as a direct replacement for LM2903DRE4?

A: Yes. LM2903M/NOPB is a direct functional replacement with identical electrical specifications and 8-SOIC package compatibility. The only difference is the operating temperature upper limit reduced from 125°C to 85°C. For applications operating below 85°C, this substitution requires no circuit modifications.

Q: What is the difference between LM2903M/NOPB and LM2903MX/NOPB?

A: Both parts are electrically identical with the same specifications and operating temperature range (-40°C to 85°C). The difference is packaging format: LM2903M/NOPB is supplied in Tube packaging, while LM2903MX/NOPB is supplied in Cut Tape (CT) & Digi-Reel format. Select based on your procurement and assembly requirements.

Q: Why should I consider AS393MTR-E1 instead of the Texas Instruments alternatives?

A: AS393MTR-E1 offers superior electrical performance with lower input offset voltage (5mV versus 7mV) and reduced quiescent current (1mA versus 2.5mA). It maintains the same supply voltage range and 8-SOIC package. The trade-off is a slightly higher moisture sensitivity level (MSL 3 versus MSL 1) and reduced operating temperature range (-40°C to 85°C). For applications not requiring extended temperature operation, this part provides better power efficiency and input accuracy.

Q: Is the BA10393F-E2 package compatible with LM2903DRE4 PCB layouts?

A: The BA10393F-E2 uses an 8-SOP package with a 4.40mm width, compared to the 8-SOIC package with 3.90mm width of the original part. While both are 8-pin surface-mount packages with identical pin pitch, the slightly wider package may require PCB layout verification. Pin-to-pin compatibility is maintained, but physical clearance around the component should be confirmed before substitution.

Q: Can I use LM2903DR (UMW) in my application?

A: LM2903DR is a parametric equivalent suitable only if your application operates within its narrower specifications: supply voltage 2V to 30V (single) or ±1V to ±15V (dual), and operating temperature 0°C to 70°C. If your circuit requires the full 2V to 36V supply range or operates below 0°C or above 70°C, this part is not suitable. Verify your application requirements before selection.

Q: What does MSL 3 (168 hours) mean for AS393MTR-E1 and AS393MTR-G1?

A: MSL 3 indicates the component requires moisture control during storage and handling. The part can be exposed to ambient conditions (30°C, 85% relative humidity) for a maximum of 168 hours before soldering. After this period, the component must be baked at 125°C for 24 hours to remove absorbed moisture. Standard moisture-barrier packaging and desiccant storage are required. This is more restrictive than MSL 1 (unlimited exposure) but is standard for many active components.

Q: Which substitute part has the best inventory availability?

A: AS393MTR-E1 (Diodes Incorporated) has the highest inventory at 354,160 pieces, followed by AS393MTR-G1 at 300,400 pieces. Among Texas Instruments parts, LM2903M/NOPB offers 120,721 pieces. High inventory availability reduces lead time risk for production requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, meeting the same environmental standards as the original LM2903DRE4. All parts are also REACH unaffected and carry EAR99 export classification.

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