SE555DRG4 Equivalent & Substitute Parts

Part Overview

The SE555DRG4 is a 555 Type Timer/Oscillator (Single) IC manufactured by Texas Instruments, operating at 100kHz with an 8-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design requirements and production continuity. The SE555DRG4 supports a supply voltage range of 4.5V to 18V and operates across an extended temperature range of -55°C to 125°C, making it suitable for industrial and military applications.

Substiute Parts

SE555DRG4

Texas InstrumentsIn Stock: 2212SE555DRG4 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

SE555DR

Texas InstrumentsIn Stock: 205418SE555DR Datasheet

Parametric EquivalentRFQ

NCV1455BDR2G

onsemiIn Stock: 55207NCV1455BDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SE555DRG4 are classified based on the following allowed electrical and mechanical parameters:

Primary Substitution Criteria:

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Type: 555 Type, Timer/Oscillator (Single)
• Frequency: 100kHz (for direct functional equivalence)
• Voltage - Supply: Minimum 4.5V support required
• Current - Supply: 10 mA nominal
• RoHS Status: ROHS3 Compliant

Grouping Logic:

Group 1 - Parametric Equivalents (Full Electrical Match): Parts matching all electrical specifications including frequency, voltage range, current, and temperature range. SE555DR qualifies as a parametric equivalent with identical electrical characteristics and extended temperature range (-55°C to 125°C).

Group 2 - MFR Recommended Substitutes (Active Status): LM555CM/NOPB and LM555CMX/NOPB are manufacturer-recommended alternatives with active product status. These parts maintain the 100kHz frequency and 8-SOIC package but operate within a narrower temperature range (0°C to 70°C) and reduced supply voltage range (4.5V to 16V).

Group 3 - Alternative Frequency Options (Last Time Buy): LMC555CM/NOPB operates at 3MHz with extended temperature range (-40°C to 85°C) and lower supply voltage (1.5V to 15V). This part is suitable for applications requiring higher frequency operation but is in Last Time Buy status.

Group 4 - Cross-Manufacturer Equivalents: NCV1455BDR2G from onsemi provides 555 Type functionality in the same 8-SOIC package with compatible voltage and current specifications, offering supply voltage support of 4.5V to 16V and extended temperature range (-40°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): SE555DR is the primary choice for direct replacement of SE555DRG4. Both parts are manufactured by Texas Instruments, maintain identical electrical specifications (100kHz frequency, 4.5V to 18V supply voltage, -55°C to 125°C operating temperature), and use the same 8-SOIC package. SE555DR is currently in active production status with substantial inventory availability (205,400 pcs), ensuring supply continuity. Both parts are ROHS3 compliant and carry identical regulatory certifications.

For Commercial Temperature Range Applications: LM555CM/NOPB and LM555CMX/NOPB are manufacturer-recommended alternatives when operating temperature requirements are limited to 0°C to 70°C. Both maintain 100kHz frequency operation and 8-SOIC packaging. LM555CMX/NOPB offers significantly higher inventory availability (77,170 pcs) compared to LM555CM/NOPB (2,027 pcs). The reduced supply voltage range (4.5V to 16V) must be verified against application requirements.

For Extended Temperature and Cross-Manufacturer Compatibility: NCV1455BDR2G from onsemi provides 555 Type functionality with extended temperature range (-40°C to 125°C) and active product status. This part supports the required 4.5V to 16V supply voltage and maintains the 8-SOIC package form factor. Cross-manufacturer substitution requires verification of pinout and functional equivalence in the target application.

For Higher Frequency Requirements: LMC555CM/NOPB operates at 3MHz with extended temperature range (-40°C to 85°C) and lower supply voltage requirements (1.5V to 15V). This part is suitable only for applications requiring frequency operation above 100kHz. Note that this part is in Last Time Buy status, limiting long-term availability.

Frequently Asked Questions (FAQ)

Q: Can SE555DR be used as a direct replacement for SE555DRG4? A: Yes. SE555DR is a parametric equivalent with identical electrical specifications, package type, and manufacturer. Both support 4.5V to 18V supply voltage, 100kHz frequency operation, and -55°C to 125°C temperature range. The primary difference is product status: SE555DRG4 is discontinued while SE555DR is in active production.

Q: What is the difference between LM555CM/NOPB and LM555CMX/NOPB? A: Both parts are electrically identical 555 Type timers with 100kHz frequency and 8-SOIC packaging. The primary differences are packaging format (LM555CM/NOPB is supplied in Tube; LM555CMX/NOPB is supplied in Cut Tape and Digi-Reel) and inventory availability. LM555CMX/NOPB has significantly higher stock levels.

Q: Can LM555CM/NOPB replace SE555DRG4 in all applications? A: LM555CM/NOPB is suitable for applications operating within 0°C to 70°C temperature range and 4.5V to 16V supply voltage. Applications requiring the extended temperature range (-55°C to 125°C) or supply voltage up to 18V must use SE555DR or equivalent parts that support these specifications.

Q: Why is LMC555CM/NOPB listed as a substitute if it operates at 3MHz instead of 100kHz? A: LMC555CM/NOPB is included as an alternative for applications requiring higher frequency operation. It is not a direct substitute for 100kHz applications but provides 555 Type functionality in the same 8-SOIC package. Selection depends on actual frequency requirements of the target application.

Q: Is NCV1455BDR2G from onsemi fully compatible with SE555DRG4? A: NCV1455BDR2G is a 555 Type timer in the same 8-SOIC package with compatible voltage and current specifications. Cross-manufacturer substitution requires verification of pinout compatibility and functional equivalence in the specific application circuit. Both parts are ROHS3 compliant.

Q: What packaging options are available for 555 Type timer substitutes? A: All listed substitute parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package, matching SE555DRG4. Packaging format variations (Tube, Cut Tape, Digi-Reel) affect supply and handling but do not impact electrical or mechanical compatibility.

Q: Are all substitute parts ROHS3 compliant? A: Yes. SE555DRG4 and all listed substitute parts (SE555DR, LM555CM/NOPB, LM555CMX/NOPB, LMC555CM/NOPB, NCV1455BDR2G) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).