LM555CMM Equivalent & Substitute Parts

Part Overview

The LM555CMM is a 555 Type Timer/Oscillator (Single) IC manufactured by Texas Instruments, operating at 100kHz with a supply voltage range of 4.5V to 16V. This component is packaged in 8-VSSOP surface mount configuration and is classified as Last Time Buy status. Due to its Last Time Buy designation, identifying equivalent and substitute parts is essential for design continuity and long-term supply chain planning. The substitute parts listed maintain identical electrical and mechanical specifications, ensuring direct functional replacement in existing designs.

Substiute Parts

LM555CMM

Texas InstrumentsIn Stock: 8831LM555CMM Datasheet

Current PartRFQ

LM555CMM/NOPB

Texas InstrumentsIn Stock: 1463LM555CMM/NOPB Datasheet

DirectRFQ

LM555CMMX/NOPB

Texas InstrumentsIn Stock: 3068LM555CMMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM555CMM are qualified based on strict equivalence across the following critical parameters:

• Functional Type: 555 Type, Timer/Oscillator (Single)
• Frequency Rating: 100kHz
• Supply Voltage Range: 4.5V ~ 16V
• Supply Current: 10 mA
• Operating Temperature Range: 0°C ~ 70°C
• Package Configuration: 8-VSSOP surface mount
• Physical Dimensions: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected
• Moisture Sensitivity: MSL 1 (Unlimited)

All substitute parts maintain identical electrical performance and mechanical compatibility with the original LM555CMM, enabling direct replacement without circuit modification or re-qualification.

Parameter Comparison

Engineering Selection Recommendations

For new designs and long-term supply chain requirements, LM555CMM/NOPB and LM555CMMX/NOPB are recommended as primary alternatives due to their Active product status. Both parts maintain full electrical and mechanical equivalence to the LM555CMM while offering improved availability and supply continuity.

LM555CMM/NOPB carries Direct Manufacturer Part Number designation with 1439 units in stock inventory. LM555CMMX/NOPB is classified as a Parametric Equivalent with 3000 units available, providing enhanced stock depth for high-volume applications.

All three parts comply with ROHS3 and REACH requirements, ensuring regulatory compliance across global markets. The MSL 1 rating indicates unlimited moisture sensitivity protection, suitable for standard storage and handling conditions.

Frequently Asked Questions (FAQ)

Q: Can LM555CMM/NOPB be used as a direct replacement for LM555CMM?

A: Yes. LM555CMM/NOPB is a direct manufacturer equivalent with identical electrical specifications, frequency rating, supply voltage range, operating temperature, and 8-VSSOP package configuration. The primary difference is product status: LM555CMM/NOPB is Active, while LM555CMM is Last Time Buy.

Q: What is the difference between LM555CMM/NOPB and LM555CMMX/NOPB?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. LM555CMMX/NOPB is designated as a Parametric Equivalent variant. Both maintain 100kHz frequency, 4.5V ~ 16V supply voltage, and 8-VSSOP packaging. Selection between them depends on availability and supply chain requirements.

Q: Are these parts compatible with existing PCB layouts designed for LM555CMM?

A: Yes. All substitute parts use the identical 8-VSSOP surface mount package with 0.118" width and 3.00mm dimensions. No PCB redesign or footprint modification is required.

Q: Do these substitutes maintain the same regulatory compliance?

A: Yes. All parts are ROHS3 Compliant and REACH Unaffected, matching the original LM555CMM compliance profile.

Q: What is the moisture sensitivity rating for these parts?

A: All parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for standard storage and handling.