LM324DRG4 Equivalent & Substitute Parts

Part Overview

The LM324DRG4 is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in 14-SOIC surface-mount packaging. This component is classified as obsolete, with 4499 units currently in stock. The LM324DRG4 operates across a supply voltage range of 3V to 30V and is suitable for applications requiring low-power, general-purpose amplification in the 0°C to 70°C operating temperature range. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity, long-term component sourcing, and production planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM324DRG4
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	4
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.5V/µs
Gain Bandwidth Product	1.2 MHz
Current - Input Bias	20 nA
Voltage - Input Offset	3 mV
Current - Supply	1.4mA (x4 Channels)
Current - Output / Channel	30 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	30 V
Operating Temperature	0°C ~ 70°C (TA)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM324DRG4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Number of circuits: 4 (all substitutes must contain 4 operational amplifier circuits)
Package type: 14-SOIC surface-mount configuration
Supply voltage range: Minimum 3V, maximum ≥30V
Gain bandwidth product: 1.2 MHz (or compatible with 1 MHz minimum)
Current output per channel: 30 mA minimum
Input bias current: 20 nA or lower
Input offset voltage: 3 mV or lower
RoHS3 compliance and MSL Level 1

Substitute Categories:

Category A - Direct Functional Equivalents (Active Status): Parts LM324AM/NOPB, LM324AMX/NOPB, LM324M/NOPB, and LM324MX/NOPB are Texas Instruments LinCMOS™ series components with active product status. These maintain the LM324 base product number and 14-SOIC packaging. While they specify 1 MHz gain bandwidth product and 45 nA input bias current, they operate within the same supply voltage envelope (3V to 32V) and deliver 40 mA output per channel, exceeding the LM324DRG4 specifications.

Category B - Rohm Semiconductor Alternatives: Parts LM324DR and LM2902DR from Rohm Semiconductor provide 14-SOIC/14-SOPJ packaging with extended operating temperature ranges (-40°C to 85°C and -40°C to 125°C respectively). These maintain 1.2 MHz gain bandwidth product and 20 nA input bias current, with supply voltage ranges of 3V to 32V.

Category C - Low-Power Variants: Parts LP324M/NOPB and LP324MX/NOPB are low-power alternatives with reduced slew rate (0.05V/µs), lower gain bandwidth product (100 kHz), and significantly reduced supply current (85µA). These are suitable only for applications where bandwidth and slew rate constraints are acceptable.

Category D - Alternative Manufacturers: Parts BA2902F-E2 and BA2902SF-E2 from Rohm Semiconductor provide 14-SOP packaging (0.173" width) with 500 kHz gain bandwidth product and extended temperature ranges. These represent a package variant substitution.

Parameter Comparison

Parameter	LM324DRG4	LM324AM/NOPB	LM324AMX/NOPB	LM324M/NOPB	LM324MX/NOPB	LM324DR	LM2902DR	LP324M/NOPB	LP324MX/NOPB	BA2902F-E2	BA2902SF-E2
Manufacturer	TI	TI	TI	TI	TI	Rohm	Rohm	TI	TI	Rohm	Rohm
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOPJ	14-SOPJ	14-SOIC	14-SOIC	14-SOP	14-SOP
Slew Rate	0.5V/µs	—	—	—	—	0.3V/µs	0.3V/µs	0.05V/µs	0.05V/µs	0.2V/µs	0.2V/µs
Gain Bandwidth Product	1.2 MHz	1 MHz	1 MHz	1 MHz	1 MHz	1.2 MHz	1.2 MHz	100 kHz	100 kHz	500 kHz	500 kHz
Current - Input Bias	20 nA	45 nA	45 nA	45 nA	45 nA	20 nA	20 nA	2 nA	2 nA	20 nA	20 nA
Voltage - Input Offset	3 mV	2 mV	2 mV	2 mV	2 mV	1 mV	1 mV	2 mV	2 mV	2 mV	2 mV
Current - Supply	1.4mA	1.5mA	1.5mA	1.5mA	1.5mA	1mA	1mA	85µA	85µA	700µA	700µA
Current - Output / Channel	30 mA	40 mA	40 mA	40 mA	40 mA	30 mA	30 mA	10 mA	10 mA	30 mA	30 mA
Voltage - Supply Span (Min)	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	30 V	32 V	32 V	32 V	32 V	32 V	32 V	32 V	32 V	32 V	32 V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 125°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 105°C
Product Status	Obsolete	Active	Active	Active	Active	Obsolete	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3

Engineering Selection Recommendations

For Direct Replacement with Active Product Status:

LM324AMX/NOPB and LM324MX/NOPB are the primary recommended substitutes. Both are manufactured by Texas Instruments, maintain the LinCMOS™ series designation, and carry active product status. These parts are supplied in Cut Tape and Digi-Reel packaging formats, ensuring long-term availability. The 14-SOIC package footprint is identical to the LM324DRG4. While input bias current increases to 45 nA and gain bandwidth product reduces to 1 MHz, output current capability improves to 40 mA per channel. Supply voltage range extends to 32V, providing enhanced flexibility. Both parts are ROHS3 compliant with MSL Level 1 rating.

For Extended Temperature Range Applications:

LM2902DR from Rohm Semiconductor extends the operating temperature range to -40°C to 125°C while maintaining 1.2 MHz gain bandwidth product and 20 nA input bias current. This part is suitable for industrial and automotive environments requiring wider temperature specifications. The 14-SOPJ package is mechanically compatible with 14-SOIC footprints in most PCB designs.

For Low-Power Consumption Requirements:

LP324MX/NOPB reduces supply current to 85µA, representing a 94% reduction compared to the LM324DRG4. This substitution is valid only when application bandwidth requirements are limited to 100 kHz and slew rate constraints of 0.05V/µs are acceptable. Output current capability is reduced to 10 mA per channel.

For Alternative Manufacturer Sourcing:

BA2902F-E2 and BA2902SF-E2 from Rohm Semiconductor provide 14-SOP packaging with extended temperature ranges. These parts operate at 500 kHz gain bandwidth product with 20 nA input bias current. The package width increases to 0.173" (4.40mm) compared to the standard 0.154" (3.90mm) SOIC width, requiring PCB layout verification before implementation.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. REACH status is unaffected across all alternatives.

Frequently Asked Questions (FAQ)

Q1: Can LM324AMX/NOPB directly replace LM324DRG4 without circuit modifications?

A: LM324AMX/NOPB is functionally compatible for most general-purpose amplifier applications. The 14-SOIC package footprint is identical. However, the input bias current increases from 20 nA to 45 nA, and gain bandwidth product reduces from 1.2 MHz to 1 MHz. Applications with precision DC offset requirements or high-frequency compensation networks should be re-evaluated. Output current capability improves from 30 mA to 40 mA per channel, providing additional design margin.

Q2: What is the difference between 14-SOIC and 14-SOPJ packaging?

A: Both 14-SOIC and 14-SOPJ are surface-mount packages with identical pin counts and electrical compatibility. The primary difference is the package body width: 14-SOIC measures 0.154" (3.90mm), while 14-SOPJ measures 0.173" (4.40mm). PCB footprints are typically designed to accommodate both variants. Verify footprint compatibility with your PCB design files before component selection.

Q3: Why does LM324DR from Rohm Semiconductor show lower slew rate (0.3V/µs) than the LM324DRG4 (0.5V/µs)?

A: Slew rate is a design characteristic determined by the manufacturer's internal circuit topology. LM324DR achieves lower slew rate through different compensation network design while maintaining the same 1.2 MHz gain bandwidth product. For applications requiring high slew rate performance, LM324AMX/NOPB or LM324MX/NOPB are more appropriate selections, though they do not specify slew rate in their datasheets.

Q4: Is LP324MX/NOPB suitable as a substitute for power-sensitive applications?

A: LP324MX/NOPB reduces supply current to 85µA, making it suitable for battery-powered or ultra-low-power applications. However, this substitution introduces significant performance trade-offs: gain bandwidth product reduces to 100 kHz, slew rate decreases to 0.05V/µs, and output current per channel is limited to 10 mA. Use this part only when bandwidth and output current constraints are acceptable for your application.

Q5: What is the impact of extended operating temperature range on component reliability?

A: LM2902DR (-40°C to 125°C) and BA2902F-E2 (-40°C to 125°C) are qualified for wider temperature extremes than the LM324DRG4 (0°C to 70°C). Extended temperature qualification indicates additional thermal stress testing and characterization. These parts are suitable for industrial, automotive, and harsh environment applications. Standard commercial-grade parts like LM324AMX/NOPB are appropriate for controlled indoor environments.

Q6: Are there pin-compatible alternatives from other manufacturers?

A: All substitutes listed maintain identical 14-pin SOIC/SOPJ/SOP configurations with pin-for-pin compatibility. Texas Instruments (LM324 series), Rohm Semiconductor (LM324DR, LM2902DR, BA2902 series), and other manufacturers produce functionally equivalent 4-circuit operational amplifiers in this package family. Verify electrical specifications against your application requirements before selection.

Q7: How does input offset voltage affect circuit performance?

A: Input offset voltage ranges from 1 mV (LM324DR, LM2902DR) to 3 mV (LM324DRG4) across the substitute options. Lower offset voltage reduces DC error in precision amplifier circuits. For general-purpose applications, this parameter has minimal impact. For precision instrumentation or low-level signal conditioning, select parts with 1 mV or 2 mV offset voltage specifications.

Q8: What packaging format should I specify for production procurement?

A: LM324AMX/NOPB and LM324MX/NOPB are available in Cut Tape (CT) and Digi-Reel formats, suitable for automated pick-and-place assembly. LM324AM/NOPB and LM324M/NOPB are supplied in Tube packaging, appropriate for manual assembly or lower-volume production. Rohm parts (LM324DR, LM2902DR) and BA2902 variants are available in Cut Tape format. Specify packaging format based on your manufacturing process requirements.

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