NE555DG4 Equivalent & Substitute Parts

Part Overview

The NE555DG4 is a 555 Type Timer/Oscillator (Single) IC manufactured by Texas Instruments, operating at 100kHz with an 8-SOIC surface mount package. This device is classified as Last Time Buy, indicating limited future availability. The NE555DG4 serves as a precision timing and oscillation component in applications requiring clock generation, pulse generation, and timing control circuits. Due to its Last Time Buy status, identifying functionally equivalent and compatible substitute parts is essential for design continuity and long-term supply chain planning.

Substiute Parts

NE555DG4

Texas InstrumentsIn Stock: 1013NE555DG4 Datasheet

Current PartRFQ

LM555CM/NOPB

Texas InstrumentsIn Stock: 2079LM555CM/NOPB Datasheet

MFR RecommendedRFQ

LM555CMX/NOPB

Texas InstrumentsIn Stock: 77198LM555CMX/NOPB Datasheet

MFR RecommendedRFQ

LMC555CM/NOPB

Texas InstrumentsIn Stock: 15161LMC555CM/NOPB Datasheet

MFR RecommendedRFQ

LMC555CMX/NOPB

Texas InstrumentsIn Stock: 31858LMC555CMX/NOPB Datasheet

MFR RecommendedRFQ

LM555CM

onsemiIn Stock: 18123LM555CM Datasheet

Parametric EquivalentRFQ

MC1455BDR2G

onsemiIn Stock: 3298MC1455BDR2G Datasheet

UpgradeRFQ

NCV1455BDR2G

onsemiIn Stock: 55207NCV1455BDR2G Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the NE555DG4 are classified based on the following substitution criteria:

MFR Recommended Substitutes maintain identical or superior electrical and mechanical specifications within the same product line, ensuring direct functional replacement with no design modifications required.

Parametric Equivalents share the same base functionality and package but may have minor variations in supply current or frequency specifications that do not affect circuit operation in standard applications.

Upgrade Options provide enhanced performance characteristics, such as extended operating temperature ranges or improved supply current efficiency, while maintaining full backward compatibility.

The critical parameters determining substitution validity are:

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Type: 555 Type, Timer/Oscillator (Single)
• Voltage - Supply: 4.5V ~ 16V (minimum requirement)
• RoHS Status: ROHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): LM555CM/NOPB and LM555CMX/NOPB are the primary recommended substitutes. Both are manufactured by Texas Instruments with Active product status, ensuring long-term availability. LM555CMX/NOPB offers superior inventory availability (77,170 units) and is supplied in Cut Tape & Digi-Reel packaging, providing flexibility for both prototype and production quantities.

For Extended Temperature Range Applications: MC1455BDR2G and NCV1455BDR2G, both manufactured by onsemi, extend the operating temperature range to -40°C ~ 85°C and -40°C ~ 125°C respectively. These upgrades maintain full electrical compatibility while providing enhanced thermal performance. NCV1455BDR2G offers the widest temperature specification (-40°C ~ 125°C) with the highest inventory availability (55,100 units).

For Low-Power Applications: LMC555CM/NOPB and LMC555CMX/NOPB provide significantly reduced supply current (150 µA versus 10 mA) and extended operating temperature range (-40°C ~ 85°C). These variants operate at 3MHz frequency and support lower supply voltages (1.5V ~ 15V), making them suitable for battery-powered and low-power timing applications. LMC555CMX/NOPB is Active with substantial inventory (31,756 units).

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can LM555CM/NOPB directly replace NE555DG4 without circuit modifications? A: Yes. LM555CM/NOPB is electrically and mechanically identical to NE555DG4, with matching frequency (100kHz), supply voltage range (4.5V ~ 16V), supply current (10 mA), operating temperature (0°C ~ 70°C), and 8-SOIC package. No design changes are required.

Q: What is the difference between LM555CMX/NOPB and LM555CM/NOPB? A: Both parts are electrically identical. The primary difference is packaging: LM555CMX/NOPB is supplied in Cut Tape & Digi-Reel format with significantly higher inventory (77,170 units), while LM555CM/NOPB is supplied in Tube packaging (2,027 units). Select based on procurement volume and handling requirements.

Q: Why would I choose MC1455BDR2G or NCV1455BDR2G over LM555CM/NOPB? A: These onsemi variants extend the operating temperature range to -40°C ~ 85°C (MC1455BDR2G) or -40°C ~ 125°C (NCV1455BDR2G), compared to 0°C ~ 70°C for the NE555DG4. Select these upgrades for applications requiring operation in extreme temperature environments or for enhanced thermal margin in standard applications.

Q: Are LMC555CM/NOPB and LMC555CMX/NOPB suitable replacements for NE555DG4? A: LMC555 variants are functionally compatible but operate at different specifications: 3MHz frequency (versus 100kHz), lower supply current (150 µA versus 10 mA), and extended temperature range (-40°C ~ 85°C). These are suitable only if your circuit design can accommodate the higher frequency capability and lower power consumption. They are not direct pin-for-pin replacements in frequency-critical applications.

Q: What is the inventory status for each substitute? A: LM555CMX/NOPB offers the highest availability (77,170 units). LMC555CMX/NOPB provides 31,756 units. NCV1455BDR2G supplies 55,100 units. LMC555CM/NOPB has 15,128 units. LM555CM/NOPB has 2,027 units. MC1455BDR2G has 3,266 units. Select based on project timeline and volume requirements.

Q: Is the onsemi LM555CM (Obsolete) a viable substitute? A: The onsemi LM555CM is classified as Obsolete and should be avoided for new designs. While electrically compatible, its obsolete status indicates no future manufacturing or support. Prioritize Active or Last Time Buy alternatives.

Q: Do all substitutes maintain RoHS3 compliance? A: Yes. All recommended substitutes are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing standards and environmental regulations.