LM324ADBR Equivalent & Substitute Parts

Part Overview

The LM324ADBR is a general-purpose operational amplifier manufactured by Texas Instruments, configured as a 4-circuit integrated circuit in 14-SSOP surface mount packaging. This device is classified as Last Time Buy, indicating discontinued production with limited remaining inventory of 4305 pieces. The LM324ADBR operates across a supply voltage range of 3V to 30V with an operating temperature range of 0°C to 70°C, making it suitable for standard industrial and commercial applications requiring low-cost amplification solutions.

Equivalent and substitute parts are necessary due to the Last Time Buy status of the LM324ADBR. Alternative components with compatible electrical characteristics and packaging options ensure design continuity and long-term supply chain reliability for applications currently utilizing this device.

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-SSOP (0.209", 5.30mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LM324ADBR is determined by electrical parameter compatibility and mechanical packaging constraints. The critical parameters governing substitution are:

Electrical Compatibility Criteria:

Number of circuits: Must be 4
Amplifier type: General purpose configuration
Supply voltage range: Minimum 3V, maximum ≥30V
Operating temperature range: Must encompass or exceed 0°C to 70°C
Input bias current, input offset voltage, slew rate, and gain bandwidth product: Must be within acceptable operational margins for the target application

Mechanical Compatibility Criteria:

Mounting type: Surface mount only
Package type: 14-pin configurations (SSOP, TSSOP, SOIC variants)
Pin count and footprint: 14-pin standard

Compliance Requirements:

RoHS3 compliance mandatory
Moisture sensitivity level: MSL 1 acceptable
REACH unaffected status required

Substitute parts are grouped into two categories: direct electrical equivalents with identical or superior performance characteristics, and functional alternatives with modified electrical specifications suitable for specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Package	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	Status
LM324ADBR	Texas Instruments	14-SSOP	0.5	1.2	15	1.4	30	0 to 70	Last Time Buy
LM324ADR	UMW	14-SOIC	—	—	20	1.1	30	-30 to 85	Active
LM324MT/NOPB	Texas Instruments	14-TSSOP	—	1.0	45	1.5	40	0 to 70	Active
LM324MTX/NOPB	Texas Instruments	14-TSSOP	—	1.0	45	1.5	40	0 to 70	Active
LP324MT/NOPB	Texas Instruments	14-TSSOP	0.05	0.1	2	0.085	10	0 to 70	Active
LP324MTX/NOPB	Texas Instruments	14-TSSOP	0.05	0.1	2	0.085	10	0 to 70	Active
BA10324AFV-E2	Rohm Semiconductor	14-LSSOP	0.2	0.5	20	0.6	35	-40 to 85	Active
BA2902FV-E2	Rohm Semiconductor	14-LSSOP	0.2	0.5	20	0.7	30	-40 to 125	Active
BA3474RFV-E2	Rohm Semiconductor	14-LSSOP	10	4.0	100	8.0	30	-40 to 105	Active
BA3474YFV-CE2	Rohm Semiconductor	14-LSSOP	10	4.0	100	8.0	30	-40 to 125	Active
MC3303PT	STMicroelectronics	14-TSSOP	0.5	1.0	40	2.8	30	-40 to 105	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended Primary Substitutes):

LM324MT/NOPB and LM324MTX/NOPB (Texas Instruments) provide the closest functional equivalence to the LM324ADBR. Both devices maintain the same base product number (LM324), identical operating temperature range (0°C to 70°C), and compatible supply voltage specifications (3V to 32V). These parts are manufactured by the original equipment supplier and carry Active product status with substantial inventory availability (2316 and 21068 units respectively). The primary difference is packaging format (14-TSSOP versus 14-SSOP), which requires PCB footprint modification but maintains electrical compatibility.

Extended Temperature Range Alternatives:

MC3303PT (STMicroelectronics) offers an extended operating temperature range of -40°C to 105°C while maintaining slew rate (0.5V/µs) and gain bandwidth product (1.0 MHz) specifications closely aligned with the LM324ADBR. This device is suitable for applications requiring enhanced thermal performance. Inventory availability is substantial at 100200 units.

Low-Power Variants:

LP324MT/NOPB and LP324MTX/NOPB (Texas Instruments) provide reduced supply current consumption (85µA versus 1.4mA) and lower input bias current (2nA versus 15nA). These devices are appropriate for battery-powered or power-constrained applications where the LM324ADBR's performance specifications exceed system requirements. Both maintain RoHS3 compliance and MSL 1 rating.

High-Performance Alternatives:

BA3474YFV-CE2 (Rohm Semiconductor) delivers enhanced slew rate (10V/µs) and gain bandwidth product (4.0 MHz) with automotive-grade qualification (AEC-Q100) and extended temperature range (-40°C to 125°C). This device is suitable for applications requiring faster signal processing or automotive environmental conditions.

All recommended substitutes maintain RoHS3 compliance, MSL 1 moisture sensitivity rating, and REACH unaffected status consistent with the LM324ADBR.

Frequently Asked Questions (FAQ)

Q: Can LM324MT/NOPB directly replace LM324ADBR without circuit modification?

A: Electrical substitution is direct. However, LM324MT/NOPB uses 14-TSSOP packaging (0.173" width) versus LM324ADBR's 14-SSOP packaging (0.209" width). PCB footprint modification is required. Pin configuration and electrical function are identical.

Q: What is the primary difference between LM324ADBR and LM324ADR?

A: LM324ADR is manufactured by UMW with 14-SOIC packaging instead of 14-SSOP. Operating temperature range extends to -30°C to 85°C. Supply current is reduced to 1.1mA. Electrical functionality is equivalent for standard operating conditions (0°C to 70°C).

Q: When should LP324MT/NOPB be selected over LM324ADBR?

A: LP324MT/NOPB is appropriate when supply current minimization is critical. This device consumes 85µA total supply current compared to 1.4mA for LM324ADBR. Gain bandwidth product is reduced to 100kHz and output current per channel is limited to 10mA. Application requirements must accommodate these reduced performance specifications.

Q: Is BA3474YFV-CE2 suitable for automotive applications?

A: Yes. BA3474YFV-CE2 carries AEC-Q100 automotive qualification and operates across -40°C to 125°C temperature range. This device is specifically qualified for automotive environmental conditions and is appropriate for automotive-grade system designs.

Q: What packaging options are available for LM324 equivalent devices?

A: Available packages include 14-SSOP (0.209" width), 14-TSSOP (0.173" width), 14-SOIC (0.154" width), and 14-LSSOP (0.173" width). Package selection depends on PCB layout constraints and manufacturing capabilities. All maintain 14-pin configuration and surface mount mounting type.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and REACH unaffected status, consistent with LM324ADBR environmental and regulatory requirements.

Q: What is the significance of the Last Time Buy status for LM324ADBR?

A: Last Time Buy indicates production discontinuation. Current inventory of 4305 units represents final available stock. Active substitute parts with ongoing production (LM324MT/NOPB, LM324MTX/NOPB, MC3303PT, and others) ensure long-term design support and supply chain continuity.

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