LM2904DR Equivalent & Substitute Parts

Part Overview

The LM2904DR is a general-purpose operational amplifier featuring two circuits in an 8-SOIC surface mount package. Manufactured by Rohm Semiconductor, this device operates across a supply voltage range of 3V to 26V with an operating temperature range of -40°C to 125°C. The LM2904DR is classified as "Not For New Designs," indicating it is a legacy component. Identifying equivalent and substitute parts is necessary for design continuity, inventory management, and ensuring long-term product support when the primary component becomes unavailable or reaches end-of-life status.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2904DR
Manufacturer	Rohm Semiconductor
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	2
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.3V/µs
Gain Bandwidth Product	700 kHz
Current - Input Bias	20 nA
Voltage - Input Offset	3 mV
Current - Supply	1 mA
Current - Output / Channel	40 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	26 V
Operating Temperature	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the LM2904DR is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Number of Circuits: 2
Amplifier Type: General Purpose
Voltage - Supply Span (Min): 3 V or lower
Voltage - Supply Span (Max): 26 V or higher
Operating Temperature Range: Must encompass -40°C to 125°C
Current - Output / Channel: 40 mA or higher

Direct Substitutes are parts that maintain identical or superior electrical specifications across all critical parameters while maintaining the same package and mounting configuration.

Similar Parts are components that share the same package and general functionality but may have different operating temperature ranges, supply voltage limits, or performance characteristics that require design verification for specific applications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	Gain Bandwidth Product (kHz)	Input Bias Current (nA)	Input Offset Voltage (mV)	Supply Current (mA)	Output Current / Channel (mA)	Supply Voltage Min (V)	Supply Voltage Max (V)	Operating Temperature (°C)	Package
LM2904DR	Rohm Semiconductor	Not For New Designs	0.3	700	20	3	1	40	3	26	-40 ~ 125	8-SOIC
LM2904DRG3	Texas Instruments	Last Time Buy	0.3	700	20	3	0.5 (x2)	40	3	26	-40 ~ 125	8-SOIC
LM2904DRG4	Texas Instruments	Obsolete	0.3	700	20	3	0.5 (x2)	40	3	26	-40 ~ 125	8-SOIC
LM2904QDR	Texas Instruments	Active	0.3	700	20	3	0.5 (x2)	40	3	26	-40 ~ 125	8-SOIC
LM2904QDRG4	Texas Instruments	Last Time Buy	0.3	700	20	3	0.5 (x2)	40	3	26	-40 ~ 125	8-SOIC
LM2904VDR2G	onsemi	Active	Not Specified	1000	45	7	1.5 (x2)	40	3	32	-40 ~ 125	8-SOIC
NCV2904DR2G	onsemi	Active	0.6	1000	45	7	1.5 (x2)	40	3	32	-40 ~ 125	8-SOIC
LM258ADR	Texas Instruments	Active	0.3	700	15	2	0.5 (x2)	40	3	32	-25 ~ 85	8-SOIC
LM258DG4	Texas Instruments	Obsolete	0.3	1100	20	3	0.5 (x2)	40	3	32	-25 ~ 85	8-SOIC
LM258DR	UMW	Active	Not Specified	Not Specified	45	2	1	40	Not Specified	32	-25 ~ 85	8-SOIC

Engineering Selection Recommendations

Direct Substitutes (Recommended Priority Order):

LM2904QDR (Texas Instruments, Active Status) - Preferred substitute. Maintains identical electrical specifications to the LM2904DR with Active product status, ensuring continued availability and support. Identical package, mounting type, and performance characteristics.
LM2904DRG3 (Texas Instruments, Last Time Buy) - Functionally equivalent with identical specifications. Last Time Buy status indicates limited availability; suitable for immediate replacement but not for long-term procurement.
LM2904QDRG4 (Texas Instruments, Last Time Buy) - Tape & Reel packaging variant. Identical electrical specifications but different packaging format. Suitable for high-volume manufacturing environments.

Enhanced Performance Alternatives:

LM2904VDR2G (onsemi, Active Status) - Offers improved gain bandwidth product (1 MHz vs. 700 kHz) and extended maximum supply voltage (32V vs. 26V). Higher input bias current (45 nA vs. 20 nA) and input offset voltage (7 mV vs. 3 mV) require design verification. Active status ensures long-term availability.
NCV2904DR2G (onsemi, Active Status) - Automotive-grade variant with improved slew rate (0.6V/µs vs. 0.3V/µs) and higher gain bandwidth product (1 MHz). Extended maximum supply voltage (32V). Higher input bias and offset specifications require verification.

Limited Availability Alternatives:

LM258ADR (Texas Instruments, Active Status) - Different base product (LM258 vs. LM2904) with narrower operating temperature range (-25°C to 85°C vs. -40°C to 125°C). Suitable only for applications not requiring full temperature range. Active status provides availability.
LM258DG4 (Texas Instruments, Obsolete) - Obsolete status limits suitability for new procurement. Narrower operating temperature range (-25°C to 85°C) restricts use in extended temperature applications.
LM258DR (UMW, Active Status) - Limited specification data available. Different manufacturer and incomplete electrical parameter documentation require thorough design verification before implementation.

Frequently Asked Questions (FAQ)

Q: Can LM2904QDR directly replace LM2904DR without circuit modifications?

A: Yes. LM2904QDR maintains identical electrical specifications, package configuration, and operating parameters as LM2904DR. Direct pin-for-pin substitution is supported without circuit modifications.

Q: What is the difference between LM2904DRG3, LM2904DRG4, and LM2904QDR?

A: All three parts share identical electrical specifications and package type (8-SOIC). The primary differences are product status and manufacturing date codes. LM2904QDR has Active status, ensuring continued availability. LM2904DRG3 and LM2904DRG4 have Last Time Buy and Obsolete status respectively, indicating limited future availability.

Q: Can LM2904VDR2G be used as a drop-in replacement?

A: LM2904VDR2G is electrically compatible but not a true drop-in replacement. It offers superior performance (1 MHz bandwidth vs. 700 kHz) and extended supply voltage range (32V vs. 26V), but has higher input bias current (45 nA vs. 20 nA) and input offset voltage (7 mV vs. 3 mV). Applications sensitive to input offset or bias current require design verification.

Q: Why is the operating temperature range important for substitution?

A: The LM2904DR operates from -40°C to 125°C. Substitutes with narrower temperature ranges (such as LM258 variants at -25°C to 85°C) cannot be used in applications requiring the full extended temperature specification. Temperature range mismatch may cause device failure or specification violations in extreme environments.

Q: What does "Last Time Buy" product status mean?

A: Last Time Buy indicates the manufacturer has announced end-of-life for the component. Existing inventory is available for purchase, but no new production will occur after a specified date. Parts with this status should be used for immediate replacement needs only, not for long-term procurement planning.

Q: Are there packaging differences between the substitute parts?

A: Most substitutes use 8-SOIC packaging. LM2904QDRG4 uses Tape & Reel (TR) packaging instead of Cut Tape (CT) & Digi-Reel, which affects handling and assembly processes but maintains identical electrical performance and pin configuration.

Q: How do I verify compatibility for a specific application?

A: Compare the application's requirements against the critical parameters: supply voltage range, operating temperature range, input bias current, input offset voltage, and output current capability. Ensure the substitute part meets or exceeds all application requirements across these parameters.

Q: What is the significance of RoHS3 compliance?

A: All listed substitute parts maintain RoHS3 compliance, indicating they meet Restriction of Hazardous Substances regulations. This ensures compatibility with modern manufacturing processes and regulatory requirements without additional qualification.

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