NJM12903M Equivalent & Substitute Parts

Part Overview

The NJM12903M is a dual general-purpose comparator manufactured by Nisshinbo Micro Devices Inc., housed in an 8-DMP surface-mount package. This linear integrated circuit features open-collector output configuration and operates across a supply voltage range of 2V to 14V, making it suitable for general-purpose comparison applications in industrial and consumer electronics.

The NJM12903M maintains Active product status with 2000 units in current inventory. Equivalent and substitute parts are identified based on matching functional characteristics: dual-element general-purpose comparator topology, open-collector output type, compatible operating temperature range, and surface-mount packaging. Substitutes are selected when electrical parameters fall within acceptable tolerances and package form factors provide mechanical compatibility or improved availability.

Key Parameters

Parameter	NJM12903M	Unit
Type	General Purpose Comparator	—
Number of Elements	2	—
Output Type	Open-Collector	—
Voltage - Supply, Single/Dual (±)	2V ~ 14V	V
Voltage - Input Offset (Max)	4mV @ 5V	mV
Current - Input Bias (Max)	0.2µA @ 5V	µA
Current - Output (Typ)	10mA @ 5V	mA
Operating Temperature	-40°C ~ 85°C	°C
Package / Case	8-SOIC (0.209", 5.30mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the NJM12903M is determined by the following criteria:

Functional Equivalence Requirements:

Dual-element comparator architecture (2 independent comparators per package)
Open-collector output configuration
General-purpose comparator classification

Electrical Parameter Compatibility:

Supply voltage range must encompass or overlap the 2V to 14V specification
Input offset voltage at 5V must not exceed 7mV (allowing minor tolerance variation)
Input bias current must not exceed 0.25µA at 5V
Output current capability must support minimum 10mA at 5V
Operating temperature range must include -40°C to 85°C minimum

Mechanical Compatibility:

Surface-mount packaging only (8-SOIC, 8-MSOP, 8-TSSOP, 8-VSSOP variants)
Pin count: 8 pins
Package width tolerance: 2.30mm to 5.30mm

Compliance Requirements:

RoHS3 or RoHS Compliant status
REACH Unaffected classification
Active or Last Time Buy product status

Parts meeting all four criteria categories are classified as direct substitutes. Parts with extended operating temperature ranges (to 125°C) or enhanced output current capability (84mA) are listed as functional equivalents with superior performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Operating Temp	Product Status	Inventory
NJM12903M	Nisshinbo Micro Devices	8-SOIC (5.30mm)	2V ~ 14V	4mV @ 5V	0.2µA @ 5V	10mA @ 5V	-40°C ~ 85°C	Active	2000 Pcs
AS393MMTR-G1	Diodes Incorporated	8-MSOP (3.00mm)	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	-40°C ~ 85°C	Active	18400 Pcs
AS393MTR-G1	Diodes Incorporated	8-SOIC (3.90mm)	2V ~ 36V, ±1V ~ 18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	-40°C ~ 85°C	Active	300400 Pcs
BA2903FVM-TR	Rohm Semiconductor	8-MSOP (2.80mm)	2V ~ 36V, ±1V ~ 18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	-40°C ~ 125°C	Active	17788 Pcs
LMV393IDDUR	Texas Instruments	8-VSSOP (2.30mm)	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	-40°C ~ 85°C	Last Time Buy	15310 Pcs
LMV393IDGKR	Texas Instruments	8-MSOP (3.00mm)	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	-40°C ~ 85°C	Active	1734 Pcs
LMV393IPWR	National Semiconductor	8-TSSOP (4.40mm)	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	-40°C ~ 85°C	Active	65220 Pcs
LMV393MMX/NOPB	Texas Instruments	8-VSSOP (3.00mm)	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	-40°C ~ 85°C	Active	4316 Pcs
LMV393MX	Texas Instruments	8-SOIC (3.90mm)	2.7V ~ 5.5V	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	-40°C ~ 85°C	Last Time Buy	1405 Pcs
LMV393QDRQ1	Texas Instruments	8-SOIC (3.90mm)	2.7V ~ 5.5V	7mV @ 5V	0.025µA @ 5V	84mA @ 5V	-40°C ~ 125°C	Active	17600 Pcs

Engineering Selection Recommendations

Primary Substitutes (Direct Functional Equivalents):

AS393MTR-G1 and AS393MMTR-G1 from Diodes Incorporated provide direct functional substitution with extended supply voltage range (2V to 36V) and improved output current capability (16mA). Both maintain Active product status and RoHS3 compliance. AS393MTR-G1 offers superior inventory availability (300400 units) and 8-SOIC packaging matching the original form factor.

High-Performance Alternatives:

LMV393 series devices from Texas Instruments (LMV393IPWR, LMV393IDGKR, LMV393MMX/NOPB, LMV393MX, LMV393QDRQ1) deliver significantly higher output current capability (84mA) and reduced input bias current (0.025µA for QDRQ1 variant). LMV393IPWR provides the largest inventory stock (65220 units) among all substitutes. LMV393QDRQ1 extends operating temperature to 125°C and includes automotive-grade AEC-Q100 qualification.

Extended Temperature Operation:

BA2903FVM-TR from Rohm Semiconductor and LMV393QDRQ1 from Texas Instruments both support -40°C to 125°C operating range, exceeding the NJM12903M specification. BA2903FVM-TR offers MSL 1 moisture sensitivity rating (unlimited shelf life) compared to MSL 2 for the original part.

Inventory and Availability Considerations:

AS393MTR-G1 (300400 units) and LMV393IPWR (65220 units) represent highest-availability options. LMV393IDDUR and LMV393MX carry Last Time Buy status, indicating discontinued production; selection should account for long-term supply requirements.

Supply Voltage Constraints:

LMV393 series devices operate within 2.7V to 5.5V range, narrower than the NJM12903M specification (2V to 14V). Applications requiring operation above 5.5V must select AS393 series or BA2903FVM-TR, which support up to 36V supply voltage.

Frequently Asked Questions (FAQ)

Q: Can LMV393 series parts directly replace NJM12903M in all applications?

A: LMV393 devices are functionally equivalent for comparator operation but operate within 2.7V to 5.5V supply range. If your application requires supply voltages above 5.5V or below 2.7V, LMV393 substitution is not suitable. AS393 series or BA2903FVM-TR support extended voltage ranges compatible with NJM12903M specifications.

Q: What is the difference between 8-SOIC, 8-MSOP, and 8-TSSOP packages?

A: All three are 8-pin surface-mount packages with identical pin configurations and electrical function. Primary differences are physical dimensions: 8-SOIC measures 3.90mm to 5.30mm width, 8-MSOP measures 3.00mm width, and 8-TSSOP measures 4.40mm width. Package selection depends on PCB layout constraints and available board space. Electrical performance is equivalent across all package variants.

Q: Why do some substitutes show higher output current (84mA vs. 10mA)?

A: Output current specification indicates the maximum current the open-collector output can sink. Higher output current capability (84mA in LMV393 series) provides greater design margin and allows driving heavier loads without additional buffering. This represents an enhancement over the original NJM12903M specification and does not create compatibility issues in existing designs.

Q: Is the AS393 series compatible with the NJM12903M pinout?

A: Yes. AS393MMTR-G1 and AS393MTR-G1 maintain identical 8-pin open-collector comparator configuration with pin-for-pin compatibility. Both devices are drop-in replacements from an electrical and mechanical standpoint, with the primary difference being package form factor (8-MSOP vs. 8-SOIC).

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

A: Last Time Buy indicates the manufacturer has announced end-of-life for that part number. Existing inventory is available for purchase, but no future production is planned. LMV393IDDUR and LMV393MX carry this status. For new designs or long-term production requirements, Active status parts (AS393MTR-G1, LMV393IPWR, LMV393QDRQ1) are recommended.

Q: Can I use BA2903FVM-TR in applications requiring -40°C to 85°C operation?

A: Yes. BA2903FVM-TR supports -40°C to 125°C operating range, which fully encompasses the -40°C to 85°C requirement. The extended temperature capability provides additional design margin and is fully compatible with standard industrial temperature specifications.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL indicates how long a component can be stored in standard conditions before moisture absorption affects solderability. NJM12903M carries MSL 2 (1 Year shelf life), while BA2903FVM-TR carries MSL 1 (Unlimited shelf life). Higher MSL ratings provide longer storage windows and reduced risk of moisture-related soldering defects in manufacturing environments with extended component inventory periods.

Q: Are all listed substitutes RoHS compliant?

A: All substitute parts listed carry either RoHS Compliant or ROHS3 Compliant status. ROHS3 represents the current regulatory standard. All parts are REACH Unaffected, confirming compliance with European chemical substance regulations. The original NJM12903M is RoHS Compliant, and all substitutes maintain or exceed this compliance level.

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