11LC040T-I/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 11LC040T-I/SN is a 4Kbit Single Wire EEPROM memory IC manufactured by Microchip Technology, designed for non-volatile data storage applications requiring minimal pin count and low-speed serial communication. This component operates across a wide supply voltage range (2.5V to 5.5V) and industrial temperature range (-40°C to 85°C), making it suitable for embedded systems, IoT devices, and industrial control applications. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on matching electrical specifications, memory capacity, interface protocol, and package form factor to ensure direct functional equivalence.

Substiute Parts

11LC040T-I/SN

Microchip TechnologyIn Stock: 1670011LC040T-I/SN Datasheet

Current PartRFQ

11LC040-I/SN

Microchip TechnologyIn Stock: 363511LC040-I/SN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 11LC040T-I/SN are identified based on strict equivalence across the following critical parameters:

• Memory capacity: 4Kbit (512 x 8 organization)
• Interface type: Single Wire protocol at 100 kHz
• Electrical specifications: 2.5V to 5.5V supply voltage range
• Thermal performance: -40°C to 85°C operating temperature range
• Package form factor: 8-SOIC surface mount package
• Compliance certifications: ROHS3 compliance and EAR99 classification

The 11LC040-I/SN qualifies as a direct substitute based on identical electrical and mechanical specifications. The primary difference is packaging format (Tube versus standard packaging), which does not affect functional performance or circuit-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the 11LC040T-I/SN and 11LC040-I/SN are active production parts from Microchip Technology with identical electrical and mechanical specifications. Selection between these parts should be based on:

• Packaging format requirements: The 11LC040T-I/SN is supplied in standard packaging, while the 11LC040-I/SN is supplied in Tube format. Tube packaging is typically preferred for automated assembly processes.
• Supply chain availability: Current inventory shows 16,600 units of the main part and 3,548 units of the substitute, allowing flexibility based on procurement timelines.
• Compliance requirements: Both parts meet ROHS3 compliance and carry EAR99 classification, suitable for regulated applications.
• Long-term support: Both parts maintain active production status, ensuring continued availability and technical support from Microchip Technology.

Frequently Asked Questions (FAQ)

Q: Can the 11LC040-I/SN be used as a direct replacement for the 11LC040T-I/SN in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all functional parameters. The only difference is packaging format (Tube versus standard). No circuit modifications or firmware changes are required.

Q: What is the significance of the packaging difference between these parts?

A: Packaging format affects supply chain handling and assembly processes. Tube packaging (11LC040-I/SN) is optimized for high-volume automated pick-and-place assembly, while standard packaging (11LC040T-I/SN) may be preferred for lower-volume or manual assembly operations. Functional performance is identical.

Q: Are there any temperature or voltage derating considerations when substituting these parts?

A: No. Both parts operate identically across the full -40°C to 85°C temperature range and 2.5V to 5.5V supply voltage range. No derating or design modifications are necessary.

Q: What compliance certifications apply to both parts?

A: Both the 11LC040T-I/SN and 11LC040-I/SN are ROHS3 compliant, carry EAR99 export classification, and are REACH unaffected. Both maintain unlimited moisture sensitivity rating (MSL 1).

Q: How do I verify compatibility with my existing PCB layout?

A: Both parts use identical 8-SOIC package dimensions (0.154" width, 3.90mm). PCB footprints, trace routing, and component placement require no modification. Verify that your design accommodates the Single Wire interface protocol at 100 kHz operation.