NJM12903D Equivalent & Substitute Parts

Part Overview

The NJM12903D is a dual general-purpose comparator manufactured by Nisshinbo Micro Devices Inc., housed in an 8-DIP through-hole package. This device features open-collector output configuration and operates across a supply voltage range of 2V to 14V, making it suitable for analog signal comparison applications in industrial and consumer electronics. The part is currently in active production status with 1328 units in stock.

Substitute parts are necessary when the NJM12903D becomes unavailable, when alternative packaging formats are required for design optimization, or when enhanced electrical specifications are needed for specific application requirements. The substitute parts listed maintain functional equivalence through matching element count, output type, and core operating parameters while offering variations in packaging, supply voltage ranges, and performance characteristics.

Substiute Parts

NJM12903D

Nisshinbo Micro Devices Inc.In Stock: 1424NJM12903D Datasheet

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AS393P-E1

Diodes IncorporatedIn Stock: 40236AS393P-E1 Datasheet

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AZV393MTR-G1

Diodes IncorporatedIn Stock: 3828AZV393MTR-G1 Datasheet

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BA10393F-E2

Rohm SemiconductorIn Stock: 105366BA10393F-E2 Datasheet

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BA2903F-E2

Rohm SemiconductorIn Stock: 7626BA2903F-E2 Datasheet

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BA2903SF-E2

Rohm SemiconductorIn Stock: 20369BA2903SF-E2 Datasheet

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LM2903P

Texas InstrumentsIn Stock: 22619LM2903P Datasheet

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LMV393ID

Texas InstrumentsIn Stock: 1151LMV393ID Datasheet

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LMV393IDGKR

Texas InstrumentsIn Stock: 1818LMV393IDGKR Datasheet

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LMV393MM

National SemiconductorIn Stock: 1913LMV393MM Datasheet

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LMV393MM/NOPB

Texas InstrumentsIn Stock: 4483LMV393MM/NOPB Datasheet

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LMV393MMX/NOPB

Texas InstrumentsIn Stock: 4386LMV393MMX/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the NJM12903D is determined by the following critical parameters:

Functional Equivalence Requirements:

• Number of Elements: Must be 2 (dual comparator)
• Output Type: Must be Open-Collector
• Type: Must be General Purpose comparator

Electrical Compatibility Requirements:

• Voltage - Supply, Single/Dual (±): Substitute supply range must encompass or exceed 2V ~ 14V
• Voltage - Input Offset (Max): Substitute value must not exceed 7mV @ 5V
• Current - Input Bias (Max): Substitute value must not exceed 0.25µA @ 5V
• Current - Output (Typ): Substitute value must support minimum 10mA @ 5V
• Operating Temperature: Substitute range must include -40°C ~ 85°C minimum

Package Compatibility: Substitutes are grouped into two categories:

1. Through-Hole DIP Packages (AS393P-E1, LM2903P): Direct PCB footprint compatibility with NJM12903D
2. Surface-Mount Packages (AZV393MTR-G1, BA10393F-E2, BA2903F-E2, BA2903SF-E2, LMV393ID, LMV393IDGKR, LMV393MM/NOPB): Require different PCB layout and assembly process

All listed substitutes maintain active product status or are available in sufficient inventory. RoHS3 compliance is standard across substitute options.

Parameter Comparison

Engineering Selection Recommendations

Through-Hole Package Substitutes (Direct PCB Compatibility):

The AS393P-E1 (Diodes Incorporated, 8-PDIP) provides the most direct substitution for through-hole applications. It maintains the same DIP footprint as the NJM12903D while offering extended supply voltage range (2V ~ 36V) and improved output current capability (16mA vs. 10mA). This part carries ROHS3 compliance and MSL 1 rating, indicating superior moisture resistance compared to the original part's MSL 2 specification. Inventory availability is substantial at 40,200 units.

The LM2903P (Texas Instruments, 8-PDIP) offers an alternative through-hole option with rail-to-rail output capability and extended temperature range to 125°C. This part is suitable for applications requiring enhanced thermal performance. Inventory stands at 22,509 units with ROHS3 compliance.

Surface-Mount Package Substitutes (Design Optimization):

For applications requiring surface-mount technology, the BA10393F-E2 (Rohm Semiconductor, 8-SOP) and BA2903F-E2 (Rohm Semiconductor, 8-SOP) provide equivalent electrical performance with extended supply voltage range and improved quiescent current specifications. The BA2903F-E2 extends operating temperature to 125°C. Both parts carry ROHS3 compliance and MSL 1 rating. Inventory for BA10393F-E2 is 105,300 units.

The LMV393IDGKR (Texas Instruments, 8-VSSOP) offers the most compact surface-mount footprint (0.118" width) while maintaining electrical equivalence within the 2.7V ~ 5.5V supply range. This part is suitable for space-constrained designs. Inventory is 1,734 units with active product status.

Selection Criteria:

• Footprint Constraint: If PCB layout requires through-hole mounting, select AS393P-E1 or LM2903P
• Supply Voltage Range: If application requires operation below 2.7V or above 5.5V, select AS393P-E1, BA10393F-E2, BA2903F-E2, or LM2903P
• Space Optimization: If PCB area is limited, select LMV393IDGKR or LMV393MM/NOPB
• Temperature Performance: If operating temperature exceeds 85°C, select BA2903F-E2 (125°C) or LM2903P (125°C)
• Inventory Availability: For immediate procurement, AS393P-E1 (40,200 units) or BA10393F-E2 (105,300 units) offer maximum stock levels

All recommended substitutes maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory compliance across global markets.

Frequently Asked Questions (FAQ)

Q: Can the AS393P-E1 replace the NJM12903D in existing PCB designs without layout modifications?

A: Yes. The AS393P-E1 uses the same 8-PDIP footprint (0.300", 7.62mm) as the NJM12903D. Both parts feature identical pin spacing and through-hole mounting requirements. No PCB layout changes are necessary. The AS393P-E1 offers improved specifications including higher output current (16mA vs. 10mA) and extended supply voltage range (2V ~ 36V vs. 2V ~ 14V).

Q: What is the key difference between through-hole DIP packages and surface-mount packages?

A: Through-hole packages (8-DIP, 8-PDIP) use leads inserted into PCB holes and soldered on the reverse side, suitable for manual assembly and prototyping. Surface-mount packages (8-SOIC, 8-SOP, 8-VSSOP) mount directly on the PCB surface, enabling automated assembly and higher component density. Surface-mount packages typically offer smaller footprints and are standard in modern manufacturing.

Q: Does the LMV393IDGKR operate at the same supply voltage as the NJM12903D?

A: No. The LMV393IDGKR operates within 2.7V ~ 5.5V, while the NJM12903D operates within 2V ~ 14V. The LMV393IDGKR cannot operate below 2.7V or above 5.5V. For applications requiring the full 2V ~ 14V range, select AS393P-E1, BA10393F-E2, BA2903F-E2, or LM2903P instead.

Q: What does MSL (Moisture Sensitivity Level) indicate?

A: MSL indicates the component's sensitivity to moisture absorption during storage and handling. MSL 1 (Unlimited shelf life) is superior to MSL 2 (1 Year shelf life). Most substitute parts carry MSL 1 rating, providing longer shelf life and reduced risk of moisture-induced failures during assembly. This is particularly important for components stored in non-controlled environments.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, indicating lead-free manufacturing and compliance with hazardous substance restrictions. The original NJM12903D is RoHS compliant. All parts are REACH unaffected, confirming no restricted substances are present.

Q: Which substitute offers the highest output current capability?

A: The AZV393MTR-G1, LMV393ID, LMV393IDGKR, and LMV393MM/NOPB all provide 84mA typical output current, significantly higher than the NJM12903D's 10mA. These parts are suitable for applications requiring higher load-driving capability. However, these parts operate within the narrower 2.7V ~ 5.5V supply range.

Q: Can I use the BA2903F-E2 in applications requiring operation above 85°C?

A: Yes. The BA2903F-E2 operates across -40°C ~ 125°C, extending the upper temperature limit by 40°C compared to the NJM12903D. This part is suitable for high-temperature industrial applications. The BA2903SF-E2 operates to 105°C, providing an intermediate temperature option.

Q: What is the significance of the input offset voltage specification?

A: Input offset voltage represents the differential voltage required between the two inputs to produce zero output. Lower values indicate better accuracy. The NJM12903D specifies 4mV maximum at 5V, while most substitutes specify 5mV to 7mV. For precision applications requiring offset below 5mV, the NJM12903D or AS393P-E1 are preferred.

Q: Is the LM2903P suitable for rail-to-rail output applications?

A: Yes. The LM2903P features rail-to-rail output capability, allowing output voltage to swing closer to the supply rails compared to standard open-collector designs. This characteristic is beneficial in low-voltage applications where maximum output swing is required. The NJM12903D does not specify rail-to-rail capability.

Q: What inventory considerations should guide substitute selection?

A: BA10393F-E2 offers the highest inventory (105,300 units), ensuring immediate availability for large-volume production. AS393P-E1 provides 40,200 units for through-hole applications. LMV393IDGKR and LMV393ID offer lower inventory (1,734 and 1,103 units respectively), suitable for small-volume or prototype applications. For critical supply chain requirements, select parts with inventory exceeding 20,000 units.