LM324DRE4 Equivalent & Substitute Parts

Part Overview

The LM324DRE4 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 1,111 pieces currently in stock. The LM324DRE4 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	LM324DRE4
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Description	IC OPAMP GP 4 CIRCUIT 14SOIC
Amplifier Type	General Purpose
Number of Circuits	4
Slew Rate	0.5V/µs
Gain Bandwidth Product	1.2 MHz
Current - Input Bias	20 nA
Voltage - Input Offset	3 mV
Current - Supply	1.4 mA (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)
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LM324DRE4 are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Number of Circuits: 4 (all substitutes maintain this requirement)
Package Type: 14-SOIC or equivalent 14-pin surface-mount configuration
Mounting Type: Surface Mount
Supply Voltage Range: Minimum 3V, Maximum ≥30V
Gain Bandwidth Product: 1.2 MHz or higher
Current - Input Bias: ≤20 nA
Voltage - Input Offset: ≤3 mV
Current - Output / Channel: ≥30 mA
RoHS3 Compliance and MSL Level 1

Substitution Groups:

Group 1: Active Status, Texas Instruments LinCMOS™ Series Parts LM324AM/NOPB, LM324AMX/NOPB, LM324M/NOPB, and LM324MX/NOPB are active-status alternatives from Texas Instruments. These parts maintain the LM324 base product number and are available in multiple packaging formats (Tube and Cut Tape & Digi-Reel®). They feature 1 MHz gain bandwidth product and are suitable for direct replacement in new designs.

Group 2: Obsolete Status, Rohm Semiconductor Alternatives Parts LM324DR and LM2902DR are obsolete-status alternatives from Rohm Semiconductor. LM324DR maintains identical base product number compatibility, while LM2902DR offers extended operating temperature range (-40°C to 125°C) compared to the original part.

Group 3: Low-Power Active Alternatives Parts LP324M/NOPB and LP324MX/NOPB are active-status, low-power variants from Texas Instruments. These parts feature significantly reduced slew rate (0.05V/µs), lower gain bandwidth product (100 kHz), and reduced supply current (85µA), making them suitable only for applications where lower performance specifications are acceptable.

Group 4: Extended Temperature Range Active Alternatives Part BA2902F-E2 and BA2902SF-E2 from Rohm Semiconductor offer extended operating temperature ranges (-40°C to 125°C and -40°C to 105°C respectively) with 500 kHz gain bandwidth product and are available in active status.

Parameter Comparison

Part Number	Manufacturer	Status	GBW (MHz)	Slew Rate (V/µs)	Input Bias (nA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	Package
LM324DRE4	Texas Instruments	Obsolete	1.2	0.5	20	3	1.4	30	0 ~ 70	14-SOIC
LM324AM/NOPB	Texas Instruments	Active	1	—	45	2	1.5	40	0 ~ 70	14-SOIC
LM324AMX/NOPB	Texas Instruments	Active	1	—	45	2	1.5	40	0 ~ 70	14-SOIC
LM324M/NOPB	Texas Instruments	Active	1	—	45	2	1.5	40	0 ~ 70	14-SOIC
LM324MX/NOPB	Texas Instruments	Active	1	—	45	2	1.5	40	0 ~ 70	14-SOIC
LM324DR	Rohm Semiconductor	Obsolete	1.2	0.3	20	1	1	30	-40 ~ 85	14-SOIC
LM2902DR	Rohm Semiconductor	Obsolete	1.2	0.3	20	1	1	30	-40 ~ 125	14-SOIC
LP324M/NOPB	Texas Instruments	Active	0.1	0.05	2	2	0.085	10	0 ~ 70	14-SOIC
LP324MX/NOPB	Texas Instruments	Active	0.1	0.05	2	2	0.085	10	0 ~ 70	14-SOIC
BA2902F-E2	Rohm Semiconductor	Active	0.5	0.2	20	2	0.7	30	-40 ~ 125	14-SOIC
BA2902SF-E2	Rohm Semiconductor	Active	0.5	0.2	20	2	0.7	30	-40 ~ 105	14-SOIC

Engineering Selection Recommendations

For Direct Replacement in Active Production:

The LM324AMX/NOPB and LM324MX/NOPB from Texas Instruments are the primary recommended substitutes. Both parts maintain active product status, ROHS3 compliance, and MSL Level 1 rating. These parts are available in high inventory quantities (36,756 and 50,513 pieces respectively) and are packaged in Cut Tape & Digi-Reel® format suitable for automated assembly. The LinCMOS™ series designation indicates compatibility with the original LM324 architecture. Operating temperature range remains 0°C to 70°C, matching the original specification.

For Extended Temperature Range Applications:

The LM2902DR from Rohm Semiconductor extends the operating temperature range to -40°C to 125°C while maintaining the 1.2 MHz gain bandwidth product and 30 mA output current per channel. This part is suitable for industrial and automotive applications requiring wider temperature operation. Inventory availability is substantial at 90,223 pieces.

For Low-Power Applications:

The LP324MX/NOPB from Texas Instruments is suitable only for applications where reduced performance specifications are acceptable. This part features 85µA supply current and 100 kHz gain bandwidth product, representing a significant reduction from the original 1.4 mA and 1.2 MHz specifications. Use this part only when power consumption is the primary design constraint.

For Extended Temperature with Reduced Performance:

The BA2902F-E2 from Rohm Semiconductor offers -40°C to 125°C operating range with 500 kHz gain bandwidth product and 700µA supply current. This part represents a compromise between temperature range extension and performance retention.

Frequently Asked Questions (FAQ)

Q: Can LM324AMX/NOPB be used as a direct pin-for-pin replacement for LM324DRE4?

A: Yes. Both parts are 4-circuit general-purpose operational amplifiers in 14-SOIC surface-mount packaging with identical pinout. The LM324AMX/NOPB is available in active status with ROHS3 compliance and MSL Level 1 rating, making it suitable for direct substitution in new designs and production.

Q: What is the difference between LM324MX/NOPB and LM324AMX/NOPB?

A: Both parts are electrically identical with 1 MHz gain bandwidth product, 45 nA input bias current, and 2 mV input offset voltage. The primary difference is packaging format: LM324MX/NOPB is supplied in Cut Tape & Digi-Reel® format, while LM324AM/NOPB is supplied in Tube format. Selection depends on assembly process requirements.

Q: Why does the LM324DRE4 have a higher slew rate (0.5V/µs) than LM324DR (0.3V/µs)?

A: Slew rate differences reflect design variations between manufacturers. The LM324DRE4 from Texas Instruments and LM324DR from Rohm Semiconductor are both based on the LM324 architecture but incorporate different process technologies. Both maintain the 1.2 MHz gain bandwidth product and are functionally equivalent for general-purpose amplification applications.

Q: Is the LM2902DR suitable as a substitute for the LM324DRE4?

A: Yes, with considerations. The LM2902DR maintains the 1.2 MHz gain bandwidth product, 30 mA output current, and 14-SOIC packaging. The primary advantage is extended operating temperature range (-40°C to 125°C). However, the LM2902DR is based on the LM2902 base product number rather than LM324, though both are functionally compatible general-purpose amplifiers.

Q: Can LP324MX/NOPB replace LM324DRE4 in all applications?

A: No. The LP324MX/NOPB is a low-power variant with significantly reduced performance specifications: 100 kHz gain bandwidth product (versus 1.2 MHz), 0.05V/µs slew rate (versus 0.5V/µs), and 10 mA output current per channel (versus 30 mA). Use this part only in applications where power consumption is the primary design constraint and reduced bandwidth is acceptable.

Q: What is the significance of the 14-SOIC package width difference (0.154" vs 0.173")?

A: The BA2902F-E2 and BA2902SF-E2 use 14-SOP packaging with 0.173" width, compared to the standard 14-SOIC at 0.154" width. While both are surface-mount packages with identical pinout, the slightly wider body may require PCB layout verification to ensure clearance with adjacent components. Consult PCB design guidelines before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original LM324DRE4 specifications. This ensures compatibility with modern manufacturing processes and environmental regulations.

Q: What inventory considerations should guide part selection?

A: The LM324MX/NOPB (50,513 pieces) and LM324AMX/NOPB (36,756 pieces) offer the highest inventory availability among active-status alternatives. The LM2902DR (90,223 pieces) provides the largest inventory pool if extended temperature range is required. These inventory levels support both immediate production needs and long-term component sourcing strategies.

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