NE555N Equivalent & Substitute Parts

Part Overview

The NE555N is a 555-type timer/oscillator IC manufactured by onsemi in 8-DIP through-hole packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The NE555N operates across a 4.5V to 16V supply range with 7.5 mA supply current and supports operating temperatures from 0°C to 70°C. Direct equivalents and functional substitutes are available from active product lines, primarily from Texas Instruments, offering improved availability and compliance certifications.

Substiute Parts

NE555N

onsemiIn Stock: 29325NE555N Datasheet

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NA555P

Texas InstrumentsIn Stock: 1619NA555P Datasheet

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SA555P

Texas InstrumentsIn Stock: 47037SA555P Datasheet

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LM555CM/NOPB

Texas InstrumentsIn Stock: 2079LM555CM/NOPB Datasheet

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LM555CN/NOPB

Texas InstrumentsIn Stock: 2247LM555CN/NOPB Datasheet

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LMC555CN/NOPB

Texas InstrumentsIn Stock: 3101LMC555CN/NOPB Datasheet

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NE555P

Texas InstrumentsIn Stock: 156362NE555P Datasheet

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SE555P

Texas InstrumentsIn Stock: 8748SE555P Datasheet

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TLC555CP

Texas InstrumentsIn Stock: 20432TLC555CP Datasheet

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TLC555IP

Texas InstrumentsIn Stock: 18103TLC555IP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the NE555N is determined by the following critical parameters:

Primary Substitution Criteria:

• IC type: 555-type timer/oscillator (single)
• Package compatibility: 8-DIP through-hole mounting
• Voltage supply range: Must encompass or exceed 4.5V ~ 16V
• Operating temperature range: Must support 0°C ~ 70°C minimum
• Supply current: Must not exceed application design limits

Substitution Categories:

Direct Upgrades (identical package, enhanced specifications):

• NA555P and SA555P maintain 8-DIP packaging with identical voltage range (4.5V ~ 16V), improved operating temperature ranges, and active product status with RoHS3 compliance.

Functional Equivalents (same package, compatible electrical parameters):

• NE555P, SE555P, LM555CN/NOPB maintain 8-DIP packaging with compatible voltage and temperature ranges, all with active status and RoHS3 compliance.

Enhanced Performance Variants (same package, extended capabilities):

• LMC555CN/NOPB and TLC555IP/TLC555CP offer reduced supply current (150 µA to 360 µA vs. 7.5 mA) and extended operating temperature ranges, suitable for low-power applications.

Package Variant (different mounting technology):

• LM555CM/NOPB provides equivalent functionality in 8-SOIC surface-mount packaging for PCB redesigns.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (8-DIP Through-Hole):

Select NE555P, LM555CN/NOPB, or SA555P for applications requiring identical package footprint and operating temperature range (0°C ~ 70°C). All three are active products with RoHS3 compliance. NE555P offers the highest inventory availability (156,300 units) and is the industry-standard replacement for obsolete NE555N designs.

For Extended Temperature Range Applications:

SE555P supports -55°C to 125°C operating range with voltage supply up to 18V, suitable for industrial and automotive environments. NA555P extends the upper temperature limit to 105°C for high-temperature applications.

For Low-Power Applications:

LMC555CN/NOPB reduces supply current to 150 µA (vs. 7.5 mA) while maintaining 8-DIP packaging, suitable for battery-powered or energy-constrained designs. TLC555IP and TLC555CP offer 360 µA supply current with extended temperature ranges.

For Surface-Mount PCB Designs:

LM555CM/NOPB provides equivalent electrical performance in 8-SOIC packaging for modern surface-mount assembly processes.

All recommended substitutes carry ROHS3 compliance and active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can NE555P directly replace NE555N without circuit modifications?

A: Yes. NE555P maintains identical 8-DIP packaging, voltage supply range (4.5V ~ 16V), and operating temperature range (0°C ~ 70°C) as NE555N. Pin configuration and functional behavior are compatible. NE555P is the direct active-product equivalent.

Q: What is the difference between NE555P and LM555CN/NOPB?

A: Both use 8-DIP packaging and support 4.5V ~ 16V supply with 0°C ~ 70°C operating range. LM555CN/NOPB is functionally equivalent. Selection depends on design requirements and inventory availability. NE555P has significantly higher stock levels.

Q: Can I use LMC555CN/NOPB as a substitute if my circuit operates at 5V?

A: Yes. LMC555CN/NOPB supports 1.5V ~ 15V supply range, which encompasses 5V operation. However, verify that your circuit design does not depend on the higher supply current of standard 555 variants (7.5 mA vs. 150 µA). Low-power variants may affect timing accuracy in certain oscillator configurations.

Q: Is LM555CM/NOPB compatible with existing through-hole PCB layouts?

A: No. LM555CM/NOPB uses 8-SOIC surface-mount packaging, requiring PCB redesign. Use 8-DIP variants (NE555P, LM555CN/NOPB, SA555P) for through-hole compatibility.

Q: What is the advantage of SE555P over NE555P?

A: SE555P extends operating temperature range to -55°C ~ 125°C and supports supply voltage up to 18V, compared to NE555P's 0°C ~ 70°C and 4.5V ~ 16V. Select SE555P for military, aerospace, or extreme-environment applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active Texas Instruments 555-type variants listed carry RoHS3 compliance. The obsolete NE555N (onsemi) does not specify RoHS status.