NJM2403D Equivalent & Substitute Parts

Part Overview

The NJM2403D is a general-purpose dual comparator integrated circuit manufactured by Nisshinbo Micro Devices Inc. in 8-DIP packaging. This device features CMOS, MOS, open-collector, and TTL output configurations, supporting supply voltages from 2V to 36V (single) or ±1V to ±18V (dual). The NJM2403D is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

NJM2403D

Nisshinbo Micro Devices Inc.In Stock: 1386NJM2403D Datasheet

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LM2903P

Texas InstrumentsIn Stock: 22619LM2903P Datasheet

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LM393PE3

Texas InstrumentsIn Stock: 33664LM393PE3 Datasheet

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LT1017IN8#PBF

Analog Devices Inc.In Stock: 79280LT1017IN8#PBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NJM2403D is determined by the following critical parameters:

Functional Equivalence Criteria:

• Dual comparator configuration (2 elements)
• 8-DIP through-hole package (0.300", 7.62mm)
• Supply voltage range compatibility: 2V ~ 36V single or ±1V ~ ±18V dual
• Output type compatibility: Open-collector or rail-to-rail configurations
• Input offset voltage within acceptable tolerance
• Input bias current specifications
• Output current capability

Substitute Parts Identified:

• LT1017IN8#PBF (Analog Devices Inc.) - Active product status
• LM2903P (Texas Instruments) - Active product status
• LM393PE3 (Texas Instruments) - Active product status

All substitute parts maintain the 8-DIP package format and through-hole mounting type. Each substitute meets the dual-element comparator requirement and operates within the specified supply voltage range.

Parameter Comparison

Engineering Selection Recommendations

LT1017IN8#PBF Selection Criteria: The LT1017IN8#PBF from Analog Devices Inc. is an active product with extended supply voltage range (1.1V ~ 40V single, ±0.55V ~ 20V dual) exceeding the NJM2403D specifications. This device demonstrates superior input offset voltage (1mV @ ±20V) and significantly lower input bias current (0.015µA @ ±20V). Higher output current capability (65mA @ 4.5V) provides enhanced drive capability. Operating temperature range matches the NJM2403D (-40°C ~ 85°C). ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) support long-term storage and reliability requirements.

LM2903P Selection Criteria: The LM2903P from Texas Instruments is an active product maintaining identical supply voltage specifications (2V ~ 36V, ±1V ~ ±18V) to the NJM2403D. Input offset voltage (7mV @ 30V) and input bias current (0.25µA @ 5V) are superior to the original device. Extended operating temperature range (-40°C ~ 125°C) provides broader thermal operation capability. ROHS3 compliance and established Texas Instruments product support ensure long-term availability.

LM393PE3 Selection Criteria: The LM393PE3 from Texas Instruments is an active product with identical supply voltage range (2V ~ 36V, ±1V ~ ±18V). This device offers the lowest input offset voltage among substitutes (5mV @ 30V) and maintains input bias current at 0.25µA @ 5V. Operating temperature range is restricted to 0°C ~ 70°C, limiting use in extended temperature applications. ROHS3 compliance and Texas Instruments product continuity support ongoing production.

Compliance and Availability: All three substitute parts maintain RoHS3 compliance and REACH unaffected status. LT1017IN8#PBF and LM2903P support the full -40°C ~ 85°C temperature range of the original NJM2403D. LM393PE3 is suitable for commercial temperature range applications only (0°C ~ 70°C).

Frequently Asked Questions (FAQ)

Q: Can the LT1017IN8#PBF directly replace the NJM2403D in all applications?

A: The LT1017IN8#PBF maintains 8-DIP through-hole packaging and dual-element comparator configuration. Supply voltage range (1.1V ~ 40V single, ±0.55V ~ 20V dual) exceeds NJM2403D specifications. Operating temperature range (-40°C ~ 85°C) matches the original device. Output type (pull-up) differs from the NJM2403D (CMOS, MOS, open-collector, TTL), requiring circuit-level verification for output stage compatibility.

Q: What are the key differences between LM2903P and LM393PE3?

A: Both devices maintain identical supply voltage specifications (2V ~ 36V, ±1V ~ ±18V) and 8-DIP packaging. LM2903P operates across -40°C ~ 125°C, while LM393PE3 is limited to 0°C ~ 70°C. LM393PE3 provides lower input offset voltage (5mV @ 30V) compared to LM2903P (7mV @ 30V). For extended temperature applications, LM2903P is the appropriate selection.

Q: Are all substitute parts RoHS compliant?

A: All three substitute parts (LT1017IN8#PBF, LM2903P, LM393PE3) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Does package compatibility guarantee functional substitution?

A: Package compatibility (8-DIP through-hole) is a necessary but not sufficient condition for substitution. Functional equivalence requires matching dual-element comparator configuration, supply voltage range, and output type compatibility. Circuit-level verification of output stage characteristics and load requirements is required before implementation.

Q: Which substitute part offers the best performance specifications?

A: The LT1017IN8#PBF demonstrates superior performance across multiple parameters: lowest input offset voltage (1mV @ ±20V), lowest input bias current (0.015µA @ ±20V), and highest output current capability (65mA @ 4.5V). Extended supply voltage range (1.1V ~ 40V single, ±0.55V ~ 20V dual) provides maximum operational flexibility.

Q: What is the moisture sensitivity level (MSL) significance for these parts?

A: LT1017IN8#PBF carries MSL 1 (unlimited storage), indicating superior moisture resistance and extended shelf life without special handling. LM2903P and LM393PE3 are not applicable for MSL classification, indicating different packaging or moisture management approaches. For long-term inventory management, LT1017IN8#PBF provides maximum storage flexibility.