NE555D Equivalent & Substitute Parts

Part Overview

The NE555D is a 555 Type Timer/Oscillator (Single) IC manufactured by onsemi in 8-SOIC surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The NE555D operates within a supply voltage range of 4.5V to 16V with a maximum supply current of 7.5 mA and an operating temperature range of 0°C to 70°C. Identifying compatible substitutes ensures design continuity and component availability for applications requiring timer and oscillator functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	NE555D
Manufacturer	onsemi
Category	Clock/Timing
Type	555 Type, Timer/Oscillator (Single)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Voltage - Supply	4.5V ~ 16V
Current - Supply	7.5 mA
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the NE555D is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

Functional Type: 555 Type, Timer/Oscillator (Single)
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage - Supply Range: 4.5V ~ 16V (minimum overlap required)
Operating Temperature Range: Must encompass or exceed 0°C ~ 70°C
Moisture Sensitivity Level (MSL): 1 (Unlimited)

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

Similar Parts maintain identical electrical specifications and packaging while offering active product status or improved availability. These include MC1455BDR2G and MC1455DR2G from onsemi.

Direct Substitutes share the same base product number (NE555) or equivalent functional classification with compatible electrical parameters. NE555S-13 from Diodes Incorporated qualifies as a direct substitute despite higher frequency specification (500kHz).

Upgrade Parts offer enhanced operating temperature ranges, higher frequency capabilities, or active product status. These include NA555D, NA555DR, NA555S-13, SA555D, SA555DR, SA555DRG4, and LM555CM/NOPB from various manufacturers including Texas Instruments, Diodes Incorporated, and Fairchild Semiconductor.

All substitute parts maintain the 8-SOIC package format, surface mount configuration, and REACH compliance status of the original NE555D.

Parameter Comparison

Part Number	Manufacturer	Voltage - Supply	Current - Supply	Operating Temperature	Frequency	Product Status	Package / Case
NE555D	onsemi	4.5V ~ 16V	7.5 mA	0°C ~ 70°C	—	Obsolete	8-SOIC
MC1455BDR2G	onsemi	4.5V ~ 16V	10 mA	-40°C ~ 85°C	—	Active	8-SOIC
MC1455DR2G	onsemi	4.5V ~ 16V	10 mA	0°C ~ 70°C	—	Active	8-SOIC
NE555S-13	Diodes Incorporated	4.5V ~ 16V	13 mA	0°C ~ 70°C	500kHz	Active	8-SOIC
NA555D	Texas Instruments	4.5V ~ 16V	10 mA	-40°C ~ 105°C	100kHz	Last Time Buy	8-SOIC
NA555DR	Texas Instruments	4.5V ~ 16V	10 mA	-40°C ~ 105°C	100kHz	Active	8-SOIC
NA555S-13	Diodes Incorporated	4.5V ~ 16V	13 mA	-40°C ~ 105°C	500kHz	Active	8-SOIC
SA555D	Fairchild Semiconductor	4.5V ~ 16V	10 mA	-40°C ~ 105°C	500kHz	Obsolete	8-SOIC
SA555DR	Texas Instruments	4.5V ~ 16V	10 mA	-40°C ~ 85°C	100kHz	Active	8-SOIC
SA555DRG4	Texas Instruments	4.5V ~ 16V	10 mA	-40°C ~ 85°C	100kHz	Obsolete	8-SOIC
LM555CM/NOPB	Texas Instruments	4.5V ~ 16V	10 mA	0°C ~ 70°C	100kHz	Active	8-SOIC

Engineering Selection Recommendations

For Active Product Status Priority: Select NA555DR, NA555S-13, SA555DR, or LM555CM/NOPB. These parts maintain active product status with full manufacturer support and ongoing availability. NA555DR and SA555DR offer the widest operating temperature ranges (-40°C to 85°C or -40°C to 105°C) suitable for extended environmental applications. MC1455DR2G provides an onsemi alternative with active status and identical operating temperature range to the original NE555D (0°C to 70°C).

For Direct Compatibility: MC1455DR2G is the closest functional equivalent, maintaining onsemi manufacturing, identical operating temperature range (0°C to 70°C), and active product status. This part requires minimal design validation for direct substitution.

For Extended Temperature Range Applications: NA555DR, NA555S-13, and SA555D extend the operating temperature range to -40°C to 105°C, accommodating industrial and automotive environments beyond the original NE555D specification.

For Supply Current Constraints: The NE555D specifies 7.5 mA maximum supply current. All substitute parts operate within acceptable current ranges (10 mA to 13 mA maximum), suitable for most applications. Verify circuit design accommodates the slightly higher current draw if operating near supply current limits.

All recommended substitutes maintain REACH compliance and MSL 1 (Unlimited) moisture sensitivity classification, ensuring regulatory and handling compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can MC1455DR2G directly replace NE555D without circuit modification? A: Yes. MC1455DR2G maintains identical voltage supply range (4.5V to 16V), operating temperature range (0°C to 70°C), 8-SOIC package format, and surface mount configuration. The slightly higher supply current (10 mA vs. 7.5 mA) is acceptable in standard timer applications. No circuit modification is required.

Q: What is the difference between NA555DR and SA555DR? A: Both are active 555 Type Timer/Oscillator ICs in 8-SOIC packaging from Texas Instruments. NA555DR operates across -40°C to 105°C with 100kHz frequency specification. SA555DR operates across -40°C to 85°C with 100kHz frequency specification. Select NA555DR for applications requiring the extended upper temperature limit of 105°C.

Q: Why do some substitutes specify frequency (100kHz or 500kHz) while NE555D does not? A: Frequency specification indicates the maximum operating frequency capability of the timer circuit. The NE555D does not specify frequency, indicating it is suitable for general-purpose timer applications. Substitutes with specified frequencies (100kHz or 500kHz) are fully compatible with NE555D applications and offer documented frequency performance for high-speed timing circuits.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed carry RoHS3 compliance certification, ensuring compatibility with RoHS-regulated applications and procurement requirements.

Q: What is the significance of packaging designations (Cut Tape, Tube, Tape & Reel)? A: Packaging designations indicate the form in which components are supplied. Cut Tape (CT) and Digi-Reel® are suitable for automated assembly. Tube packaging is suitable for manual assembly or lower-volume applications. Tape & Reel (TR) is standard for high-volume production. All formats contain identical components; selection depends on assembly process and volume requirements.

Q: Can NE555S-13 or NA555S-13 replace NE555D in standard timer applications? A: Yes. Both parts are 555 Type Timer/Oscillator ICs in 8-SOIC packaging with compatible voltage supply ranges (4.5V to 16V). The higher frequency specification (500kHz) indicates enhanced high-speed capability but does not prevent use in standard timer applications. Operating temperature ranges differ: NE555S-13 operates 0°C to 70°C (matching NE555D), while NA555S-13 extends to -40°C to 105°C.

Q: Is LM555CM/NOPB suitable for new designs? A: Yes. LM555CM/NOPB is an active product from Texas Instruments with full manufacturer support. It maintains the 555 Type Timer/Oscillator classification, 8-SOIC package, and compatible electrical parameters (4.5V to 16V supply, 10 mA current, 0°C to 70°C operating temperature). It is suitable for both replacement and new design applications.

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