LMC555CMMX Equivalent & Substitute Parts

Part Overview

The LMC555CMMX is a 555 Type Timer/Oscillator (Single) IC manufactured by Texas Instruments, operating at 3MHz with supply voltage range of 1.5V to 15V. This component is classified as Obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and production continuity. The LMC555CMMX is packaged in 8-VSSOP surface mount configuration and maintains ROHS3 compliance with unlimited moisture sensitivity level (MSL 1).

Substiute Parts

LMC555CMMX

Texas InstrumentsIn Stock: 75218LMC555CMMX Datasheet

Current PartRFQ

LMC555CMM

Texas InstrumentsIn Stock: 10301LMC555CMM Datasheet

Parametric EquivalentRFQ

LMC555CMM/NOPB

Texas InstrumentsIn Stock: 10346LMC555CMM/NOPB Datasheet

Parametric EquivalentRFQ

LMC555CMMX/NOPB

Texas InstrumentsIn Stock: 40220LMC555CMMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LMC555CMMX are determined by strict equivalence across the following critical parameters:

• Type: 555 Type, Timer/Oscillator (Single)
• Frequency: 3MHz
• Voltage - Supply: 1.5V ~ 15V
• Current - Supply: 150 µA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Supplier Device Package: 8-VSSOP
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain identical electrical specifications and mechanical packaging requirements. Substitutes differ only in product status and REACH compliance designation, which do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using LMC555CMMX, the following selection criteria apply based on product status and compliance:

LMC555CMM/NOPB and LMC555CMMX/NOPB are designated as Active products, ensuring continued availability and manufacturing support. Both parts maintain identical electrical and mechanical specifications to the obsolete LMC555CMMX and carry ROHS3 compliance with REACH Unaffected status.

LMC555CMM is classified as Last Time Buy, indicating limited future availability. This part remains functionally equivalent but represents a transitional product status.

For new designs and production continuity, LMC555CMM/NOPB or LMC555CMMX/NOPB are the preferred selections due to Active product status. The /NOPB designation indicates lead-free plating, consistent with modern manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Are all listed substitute parts electrically interchangeable with LMC555CMMX?

A: Yes. All substitute parts maintain identical electrical specifications including 3MHz frequency, 1.5V to 15V supply voltage range, 150 µA supply current, and -40°C to 85°C operating temperature range.

Q: What is the difference between LMC555CMMX and LMC555CMM/NOPB?

A: Both parts are functionally equivalent with identical electrical and mechanical specifications. The primary differences are product status (Obsolete versus Active) and REACH compliance designation. The /NOPB suffix indicates lead-free plating.

Q: Can LMC555CMM/NOPB be used as a direct replacement in existing designs?

A: Yes. LMC555CMM/NOPB is a direct functional replacement. The 8-VSSOP package, pin configuration, and electrical characteristics are identical, enabling direct PCB substitution without circuit modification.

Q: Why is REACH compliance status different between parts?

A: REACH status differences reflect regulatory classification at the time of part designation. This does not affect functional performance or electrical interchangeability. All parts maintain ROHS3 compliance.

Q: What does MSL 1 (Unlimited) mean for storage and handling?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. These components do not require special moisture control during storage or handling, simplifying logistics and inventory management.

Q: Are there any package or pinout differences between substitute parts?

A: No. All parts use identical 8-VSSOP surface mount packaging with 0.118" width (3.00mm). Pin configuration and mechanical dimensions are identical across all listed substitutes.