Equivalent & Substitute Parts for 11AA040-I/MS

Part Overview

The 11AA040-I/MS is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, featuring single-wire interface operation at 100 kHz. This device is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent memory capacity, non-volatile storage technology, and compatible electrical specifications are required for design flexibility, inventory management, or supply chain optimization.

Substiute Parts

11AA040-I/MS

Microchip TechnologyIn Stock: 191411AA040-I/MS Datasheet

Current PartRFQ

CAT24C04YI-G

Catalyst Semiconductor Inc.In Stock: 1512CAT24C04YI-G Datasheet

MFR RecommendedRFQ

CAT24C04YI-GT3

onsemiIn Stock: 74457CAT24C04YI-GT3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 11AA040-I/MS are identified based on the following critical parameters:

• Memory Capacity: 4Kbit storage with 512 x 8 organization
• Technology: EEPROM non-volatile memory
• Electrical Compatibility: Supply voltage range and operating temperature overlap
• Write Performance: 5ms write cycle time
• Compliance: RoHS3 compliance and EAR99 classification

The identified substitutes (CAT24C04YI-G and CAT24C04YI-GT3) maintain equivalent memory capacity and non-volatile EEPROM technology. However, these parts employ I2C interface protocol at 400 kHz instead of single-wire operation, representing a functional interface change that requires circuit-level design consideration.

Parameter Comparison

Engineering Selection Recommendations

11AA040-I/MS remains the primary selection for applications requiring single-wire interface protocol with 100 kHz operation. This part maintains REACH Unaffected status and MSL Level 1 rating, suitable for moisture-sensitive manufacturing environments.

CAT24C04YI-GT3 (onsemi) is the preferred substitute when I2C interface compatibility is acceptable. This part offers the highest inventory availability (74,400 pcs), verified DiGi-Electronics programmability, MSL Level 1 rating, and REACH Unaffected compliance status. The 8-TSSOP package requires PCB layout adjustment due to increased width (4.40mm vs. 3.00mm).

CAT24C04YI-G (Catalyst Semiconductor Inc.) provides an alternative I2C-based substitute with MSL Level 3 rating, requiring controlled storage conditions (168-hour maximum exposure at 60% relative humidity before reflow). REACH status is vendor-undefined, requiring supplier verification for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can CAT24C04YI-G or CAT24C04YI-GT3 directly replace 11AA040-I/MS without circuit modification?

A: No. The substitute parts employ I2C serial interface protocol, while the 11AA040-I/MS uses single-wire protocol. Circuit-level changes to the microcontroller firmware and hardware interface are required.

Q: What is the primary difference between CAT24C04YI-G and CAT24C04YI-GT3?

A: Both parts are functionally equivalent with identical electrical specifications. The primary differences are manufacturer (Catalyst Semiconductor Inc. vs. onsemi), MSL rating (3 vs. 1), REACH compliance documentation (Vendor Undefined vs. REACH Unaffected), and inventory availability (1,474 pcs vs. 74,400 pcs).

Q: Are package dimensions compatible between these parts?

A: No. The 11AA040-I/MS uses 8-MSOP packaging (3.00mm width), while both substitute parts use 8-TSSOP packaging (4.40mm width). PCB footprint redesign is necessary.

Q: Do all three parts meet RoHS3 compliance requirements?

A: Yes. All three parts are RoHS3 compliant and share the same HTSUS classification (8542.32.0051) and ECCN designation (EAR99).

Q: What are the moisture sensitivity considerations for long-term storage?

A: The 11AA040-I/MS and CAT24C04YI-GT3 have MSL Level 1 rating (unlimited shelf life). The CAT24C04YI-G has MSL Level 3 rating, requiring storage at controlled humidity and limiting pre-reflow exposure to 168 hours maximum.