LM324ADRE4 Equivalent & Substitute Parts

Part Overview

The LM324ADRE4 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 part is classified as Last Time Buy, indicating discontinued production with limited remaining inventory (834 pcs). The LM324ADRE4 operates across a supply voltage range of 3V to 30V with a gain bandwidth product of 1.2 MHz and slew rate of 0.5V/µs, making it suitable for general analog signal processing applications. Equivalent and substitute parts are necessary due to product discontinuation and to ensure design flexibility across manufacturing sources and packaging options.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	0.5	V/µs
Gain Bandwidth Product	1.2	MHz
Current - Input Bias	15	nA
Voltage - Input Offset	2	mV
Current - Supply (x4 Channels)	1.4	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	0 to 70	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LM324ADRE4 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

Number of circuits: 4 (all substitutes must be quad-channel devices)
Package type: 14-SOIC or equivalent 14-pin surface mount configuration
Supply voltage range: Minimum 3V, maximum 30V or higher
Amplifier classification: General Purpose
Surface mount mounting type
RoHS3 compliance and MSL Level 1 rating

Electrical Performance Alignment: Substitutes must maintain compatibility within the following ranges:

Gain bandwidth product: 1.0 MHz to 1.2 MHz (standard performance tier)
Slew rate: 0.2V/µs to 0.5V/µs (acceptable performance variation)
Input bias current: 2 nA to 45 nA (low-bias to standard-bias devices)
Input offset voltage: 1 mV to 2 mV (precision specification)
Output current per channel: 30 mA to 40 mA (output drive capability)

Packaging Considerations: All substitute parts maintain the 14-SOIC (0.154", 3.90mm width) or equivalent 14-SOP package footprint, ensuring PCB layout compatibility. Tape & Reel (TR) and Cut Tape (CT) packaging options are functionally equivalent for component selection purposes.

Parameter Comparison

Part Number	Manufacturer	Product Status	Gain BW (MHz)	Slew Rate (V/µs)	Input Bias (nA)	Supply Max (V)	Temp Range (°C)	Output Current (mA)	Package
LM324ADRE4	Texas Instruments	Last Time Buy	1.2	0.5	15	30	0 to 70	30	14-SOIC
LM324ADR	UMW	Active	—	—	20	30	-30 to 85	30	14-SOP
LM2902DR	Rohm Semiconductor	Obsolete	1.2	0.3	20	32	-40 to 125	30	14-SOIC
LM324AM/NOPB	Texas Instruments	Active	1.0	—	45	32	0 to 70	40	14-SOIC
LM324AMX/NOPB	Texas Instruments	Active	1.0	—	45	32	0 to 70	40	14-SOIC
LM324M/NOPB	Texas Instruments	Active	1.0	—	45	32	0 to 70	40	14-SOIC
LM324MX/NOPB	Texas Instruments	Active	1.0	—	45	32	0 to 70	40	14-SOIC
LP324M/NOPB	Texas Instruments	Active	0.1	0.05	2	32	0 to 70	10	14-SOIC
LP324MX/NOPB	Texas Instruments	Active	0.1	0.05	2	32	0 to 70	10	14-SOIC
BA10324AF-E2	Rohm Semiconductor	Active	0.5	0.2	20	32	-40 to 85	35	14-SOP
BA2902F-E2	Rohm Semiconductor	Active	0.5	0.2	20	32	-40 to 125	30	14-SOP

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The LM324AMX/NOPB and LM324AM/NOPB (Texas Instruments, Active status) are the preferred substitutes. Both maintain the same base product number (LM324), identical 14-SOIC package footprint, and equivalent operating temperature range (0°C to 70°C). These parts feature a gain bandwidth product of 1.0 MHz, which falls within acceptable performance tolerance relative to the 1.2 MHz specification of the LM324ADRE4. The higher output current capability (40 mA vs. 30 mA) provides additional design margin. Both parts are ROHS3 compliant with MSL Level 1 rating, matching the original part's environmental certifications.

Secondary Substitutes (Extended Temperature Range):

The LM2902DR (Rohm Semiconductor, Obsolete status) and BA10324AF-E2 (Rohm Semiconductor, Active status) offer extended operating temperature ranges (-40°C to 125°C and -40°C to 85°C respectively) and higher maximum supply voltage (32V). These parts maintain the 1.2 MHz and 0.5 MHz gain bandwidth products respectively, with slew rates of 0.3V/µs and 0.2V/µs. The LM2902DR is classified as Obsolete; the BA10324AF-E2 is Active. Both are ROHS3 compliant with MSL Level 1 rating.

Alternative Substitutes (Lower Performance Tier):

The LP324M/NOPB and LP324MX/NOPB (Texas Instruments, Active status) are low-power variants with significantly reduced gain bandwidth product (100 kHz) and slew rate (0.05V/µs). These parts are suitable only for applications where bandwidth and slew rate requirements are substantially lower than the original specification. Output current per channel is limited to 10 mA. These parts maintain ROHS3 compliance and MSL Level 1 rating.

Compliance and Certification:

All substitute parts listed maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) rating, ensuring compatibility with standard manufacturing and storage protocols. All parts carry REACH Unaffected status and EAR99 export classification, matching the regulatory profile of the LM324ADRE4.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LM324ADRE4 with LM324AMX/NOPB without circuit modification?

A: Yes. Both parts are quad general-purpose operational amplifiers in 14-SOIC packaging with identical pin configurations. The LM324AMX/NOPB operates within the same supply voltage range (3V to 32V) and temperature range (0°C to 70°C). The gain bandwidth product difference (1.0 MHz vs. 1.2 MHz) represents a 17% reduction in bandwidth, which is acceptable for most general-purpose applications. Verify that your circuit does not depend on the higher slew rate specification of the original part.

Q: What is the difference between LM324ADR (UMW) and LM324ADRE4 (Texas Instruments)?

A: Both are quad general-purpose operational amplifiers with identical electrical specifications (1.2 MHz gain bandwidth product, 30 mA output current, 2 mV input offset voltage). The primary differences are manufacturer (UMW vs. Texas Instruments), packaging format (Cut Tape & Digi-Reel vs. Tape & Reel), and operating temperature range (−30°C to 85°C vs. 0°C to 70°C). The LM324ADR is currently Active, while the LM324ADRE4 is Last Time Buy. Both are ROHS3 compliant.

Q: Why do some substitute parts have different package designations (14-SOP vs. 14-SOIC)?

A: The 14-SOP and 14-SOIC designations refer to slightly different physical dimensions. The 14-SOIC has a width of 0.154" (3.90mm), while the 14-SOP has a width of 0.173" (4.40mm). Both are surface mount packages with identical pin pitch and electrical compatibility. PCB footprints must be verified for dimensional compatibility before substitution. Consult the manufacturer datasheet for precise land pattern specifications.

Q: Is the LM2902DR suitable as a substitute despite being classified as Obsolete?

A: The LM2902DR meets all electrical and mechanical substitution criteria and maintains ROHS3 compliance and MSL Level 1 rating. However, Obsolete status indicates that the manufacturer has discontinued production. Inventory availability is limited (90,223 pcs reported), and future supply cannot be guaranteed. Use the LM2902DR only if current inventory is confirmed available and long-term supply is not a design requirement. For new designs, select an Active-status substitute such as BA10324AF-E2 or LM324AMX/NOPB.

Q: Can I use LP324M/NOPB as a direct substitute for LM324ADRE4?

A: No. The LP324M/NOPB is a low-power variant with significantly different electrical specifications. The gain bandwidth product is 100 kHz (vs. 1.2 MHz), slew rate is 0.05V/µs (vs. 0.5V/µs), and output current per channel is 10 mA (vs. 30 mA). These differences make the LP324M/NOPB unsuitable for applications requiring the performance characteristics of the LM324ADRE4. Use the LP324M/NOPB only in applications specifically designed for low-power, low-bandwidth operation.

Q: What is the significance of the LinCMOS™ series designation on some substitute parts?

A: LinCMOS™ is a Texas Instruments product series designation indicating CMOS input stage technology combined with bipolar output stage. Parts designated as LinCMOS™ (LM324AM/NOPB, LM324AMX/NOPB, LM324M/NOPB, LM324MX/NOPB) share this technology platform. The LM324ADRE4 does not carry this designation. Both technology approaches are functionally compatible for general-purpose amplifier applications, but LinCMOS™ parts typically feature higher input impedance and lower input bias current (45 nA vs. 15 nA).

Q: Are there any supply voltage compatibility issues between the LM324ADRE4 and its substitutes?

A: The LM324ADRE4 operates from 3V to 30V. Most substitutes (LM324ADR, LM324AM/NOPB, LM324AMX/NOPB, LM324M/NOPB, LM324MX/NOPB, LP324M/NOPB, LP324MX/NOPB) support 3V to 32V, providing full compatibility. The LM2902DR supports 3V to 32V. The BA10324AF-E2 and BA2902F-E2 support 3V to 32V. All substitutes maintain the 3V minimum supply voltage requirement. If your circuit operates at the upper voltage limit (30V), verify that the substitute part's 32V maximum rating provides adequate margin for transient overvoltage conditions.

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