NE555D Equivalent & Substitute Parts

Part Overview

The NE555D is a 555-type timer/oscillator IC manufactured by Texas Instruments, packaged in 8-SOIC surface mount configuration. This device operates at 100kHz frequency with supply voltage range of 4.5V to 16V and is classified as Last Time Buy status. Due to its Last Time Buy designation, identifying functionally equivalent and compatible substitute parts is essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	NE555D
Manufacturer	Texas Instruments
Category	Clock/Timing
Type	555 Type, Timer/Oscillator (Single)
Frequency	100kHz
Voltage - Supply	4.5V ~ 16V
Current - Supply	10 mA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the NE555D is determined by the following critical parameters:

Core Compatibility Criteria:

Package / Case: 8-SOIC (0.154", 3.90mm Width) — mechanical and electrical pin compatibility
Type: 555 Type, Timer/Oscillator (Single) — functional equivalence
Voltage - Supply: 4.5V ~ 16V — operational voltage range compatibility
Current - Supply: 10 mA — power consumption compatibility
Mounting Type: Surface Mount — assembly process compatibility
RoHS Status: ROHS3 Compliant — regulatory compliance

Substitute parts are grouped into three categories based on their relationship to the NE555D:

MFR Recommended Substitutes: Parts with identical or superior electrical specifications and active product status, directly recommended by manufacturers as drop-in replacements.

Parametric Equivalents: Parts meeting core electrical and mechanical requirements but with different product status or minor specification variations.

Upgrade Options: Parts offering enhanced performance characteristics (extended temperature range, higher frequency capability, or automotive qualification) while maintaining package and functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Frequency	Voltage - Supply	Current - Supply	Operating Temperature	Package / Case	Product Status
NE555D	Texas Instruments	100kHz	4.5V ~ 16V	10 mA	0°C ~ 70°C	8-SOIC	Last Time Buy
NE555DR	UMW	1mHz ~ 100kHz	4.5V ~ 16V	10 mA	0°C ~ 70°C	8-SOIC	Active
LM555CM/NOPB	Texas Instruments	100kHz	4.5V ~ 16V	10 mA	0°C ~ 70°C	8-SOIC	Active
LM555CMX/NOPB	Texas Instruments	100kHz	4.5V ~ 16V	10 mA	0°C ~ 70°C	8-SOIC	Active
LMC555CM/NOPB	Texas Instruments	3MHz	1.5V ~ 15V	150 µA	-40°C ~ 85°C	8-SOIC	Last Time Buy
LMC555CMX/NOPB	Texas Instruments	3MHz	1.5V ~ 15V	150 µA	-40°C ~ 85°C	8-SOIC	Active
LM555CM	onsemi	—	4.5V ~ 16V	7.5 mA	0°C ~ 70°C	8-SOIC	Obsolete
MC1455BDR2G	onsemi	—	4.5V ~ 16V	10 mA	-40°C ~ 85°C	8-SOIC	Active
NCV1455BDR2G	onsemi	—	4.5V ~ 16V	10 mA	-40°C ~ 125°C	8-SOIC	Active
BD9555FVM-CGTR	Rohm Semiconductor	—	4.5V ~ 42V	1 mA	-40°C ~ 125°C	8-MSOP	Active

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

NE555DR (UMW) and LM555CM/NOPB or LM555CMX/NOPB (Texas Instruments) are the primary recommended substitutes. These parts maintain identical package configuration (8-SOIC), matching voltage supply range (4.5V ~ 16V), current consumption (10 mA), and operating temperature range (0°C ~ 70°C). Both NE555DR and LM555CMX/NOPB carry Active product status, ensuring long-term availability and supply chain stability.

Extended Temperature Range Options:

MC1455BDR2G and NCV1455BDR2G (onsemi) provide extended operating temperature ranges (-40°C ~ 85°C and -40°C ~ 125°C respectively) while maintaining the 8-SOIC package and 4.5V ~ 16V supply voltage compatibility. NCV1455BDR2G offers the widest temperature specification (-40°C ~ 125°C), suitable for industrial and automotive applications.

Higher Performance Alternative:

LMC555CMX/NOPB (Texas Instruments) offers significantly enhanced frequency capability (3MHz versus 100kHz) with extended temperature range (-40°C ~ 85°C) and reduced supply current (150 µA). This part is suitable for applications requiring higher frequency operation while maintaining 8-SOIC package compatibility. Note that LMC555CMX/NOPB operates at reduced supply voltage (1.5V ~ 15V), which may require circuit design verification.

Avoid:

LM555CM (onsemi) carries Obsolete product status and should not be selected for new designs or production continuity planning.

BD9555FVM-CGTR (Rohm Semiconductor) uses 8-MSOP package, which differs from the 8-SOIC standard package of NE555D. This part is suitable only if PCB layout accommodates the alternative package footprint.

Frequently Asked Questions (FAQ)

Q: Can NE555DR directly replace NE555D without circuit modification?

A: Yes. NE555DR maintains identical electrical specifications (4.5V ~ 16V supply, 10 mA current, 0°C ~ 70°C operating temperature) and 8-SOIC package configuration. Pin-for-pin compatibility is confirmed. No circuit modification is required.

Q: What is the difference between LM555CM/NOPB and LM555CMX/NOPB?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications (100kHz frequency, 4.5V ~ 16V supply, 10 mA current, 0°C ~ 70°C operating temperature) and 8-SOIC package. The primary difference is packaging format: LM555CM/NOPB is supplied in Tube packaging, while LM555CMX/NOPB is supplied in Cut Tape (CT) & Digi-Reel format. Electrical performance is equivalent.

Q: Why is LMC555CMX/NOPB listed as a substitute if it operates at different voltage and frequency?

A: LMC555CMX/NOPB is classified as an upgrade option rather than a direct substitute. While it maintains 8-SOIC package compatibility and 555-type functionality, its 3MHz frequency capability and 1.5V ~ 15V supply voltage represent enhanced performance characteristics. Selection requires verification that the application circuit can operate within the reduced voltage range and benefit from higher frequency capability.

Q: Is MC1455BDR2G suitable for applications requiring extended temperature operation?

A: Yes. MC1455BDR2G operates across -40°C ~ 85°C temperature range, compared to NE555D's 0°C ~ 70°C specification. It maintains 8-SOIC package compatibility, 4.5V ~ 16V supply voltage, and 10 mA current consumption. This part is appropriate for industrial temperature environments.

Q: What is the advantage of NCV1455BDR2G over MC1455BDR2G?

A: NCV1455BDR2G extends the operating temperature range to -40°C ~ 125°C, providing 40°C additional high-temperature capability compared to MC1455BDR2G. Both maintain identical electrical specifications and 8-SOIC package. NCV1455BDR2G is suitable for automotive and extreme industrial temperature applications.

Q: Can BD9555FVM-CGTR be used as a substitute?

A: BD9555FVM-CGTR is not recommended as a direct substitute due to package incompatibility. It uses 8-MSOP package instead of the 8-SOIC standard. Selection requires PCB redesign to accommodate the alternative package footprint. Additionally, BD9555FVM-CGTR is classified as Timer Control IC rather than Timer/Oscillator, indicating functional differences.

Q: Why is LM555CM (onsemi) not recommended?

A: LM555CM carries Obsolete product status, indicating discontinued manufacturing and unavailable supply. For production continuity and long-term design support, Active or Last Time Buy status parts are preferred.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts carry ROHS3 Compliant status, matching the NE555D regulatory requirement. Compliance is confirmed across all MFR Recommended, Parametric Equivalent, and Upgrade options.

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