24LC1026T-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC1026T-E/ST is a 1Mbit I2C EEPROM memory IC manufactured by Microchip Technology, packaged in 8-TSSOP form factor. This device operates at 400 kHz clock frequency with 900 ns access time and supports supply voltages from 2.5V to 5.5V across an operating temperature range of -40°C to 125°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

24LC1026T-E/ST

Microchip TechnologyIn Stock: 72124LC1026T-E/ST Datasheet

Current PartRFQ

24LC1026T-E/SN

Microchip TechnologyIn Stock: 106924LC1026T-E/SN Datasheet

MFR RecommendedRFQ

AT24CM01-XHD-B

Microchip TechnologyIn Stock: 1000326AT24CM01-XHD-B Datasheet

MFR RecommendedRFQ

CAT24M01YI-GT3

onsemiIn Stock: 18301CAT24M01YI-GT3 Datasheet

MFR RecommendedRFQ

CAT24M01YI-GT3JN

onsemiIn Stock: 813CAT24M01YI-GT3JN Datasheet

MFR RecommendedRFQ

CAV24M01YE-GT3

onsemiIn Stock: 1222CAV24M01YE-GT3 Datasheet

MFR RecommendedRFQ

M24M01-DFDW6TP

STMicroelectronicsIn Stock: 48215M24M01-DFDW6TP Datasheet

MFR RecommendedRFQ

M24M01-DWDW3TP/K

STMicroelectronicsIn Stock: 1142M24M01-DWDW3TP/K Datasheet

MFR RecommendedRFQ

M24M01-RDW6TP

STMicroelectronicsIn Stock: 8264M24M01-RDW6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 24LC1026T-E/ST is determined by the following critical parameters:

Core Functional Requirements:

• Memory capacity: 1Mbit (128K x 8 organization)
• Interface protocol: I2C
• Supply voltage compatibility: Minimum 2.5V support required
• Operating temperature range: Minimum -40°C to 125°C support required
• Package form factor: 8-TSSOP preferred for direct replacement

Performance Considerations:

• Clock frequency: 400 kHz minimum (higher frequencies are backward compatible)
• Access time: 900 ns maximum (faster access times are acceptable)
• Write cycle time: 5ms maximum

Substitute parts are grouped into two categories based on package compatibility and performance characteristics:

Category 1 - Direct Package Replacement (8-TSSOP): Parts maintaining identical 8-TSSOP packaging with equal or superior performance specifications.

Category 2 - Functional Equivalent (Alternative Packages): Parts with identical electrical specifications but different packaging, suitable for redesign scenarios.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (8-TSSOP Package):

M24M01-DWDW3TP/K is the optimal substitute when full temperature range support (-40°C to 125°C) and 2.5V minimum supply voltage are required. This part maintains identical supply voltage specifications and extended temperature range as the original 24LC1026T-E/ST while offering superior performance (1 MHz clock frequency, 450 ns access time). AEC-Q100 automotive qualification is included.

CAV24M01YE-GT3 provides equivalent temperature range (-40°C to 125°C) and supply voltage (2.5V ~ 5.5V) specifications with improved performance metrics (1 MHz, 400 ns access time). This part carries AEC-Q100 automotive qualification.

For Applications with Reduced Temperature Range (-40°C to 85°C):

AT24CM01-XHD-B, CAT24M01YI-GT3, CAT24M01YI-GT3JN, M24M01-DFDW6TP, and M24M01-RDW6TP are all functionally compatible with reduced operating temperature specifications. These parts maintain 1Mbit capacity and I2C interface with improved clock frequency (1 MHz) and access time performance.

For Alternative Packaging (8-SOIC):

24LC1026T-E/SN is an active Microchip part maintaining identical electrical specifications to the original device but in 8-SOIC packaging. This option is suitable for designs permitting package redesign.

All substitute parts listed maintain ROHS3 compliance and 1 (Unlimited) moisture sensitivity level classification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher clock frequency than the original 24LC1026T-E/ST?

A: Yes. The original part operates at 400 kHz. Substitute parts operating at 1 MHz are backward compatible and will function correctly in applications designed for 400 kHz operation. The I2C protocol supports variable clock frequencies, and faster devices do not impose additional requirements on the host system.

Q: What is the difference between 8-TSSOP and 8-SOIC packaging?

A: Both are 8-pin surface mount packages with identical pin configurations and electrical functionality. The primary difference is physical dimensions: 8-TSSOP has a 0.173" width (4.40mm), while 8-SOIC has a 0.154" width (3.90mm). Direct PCB replacement requires matching package type. 24LC1026T-E/SN uses 8-SOIC packaging and requires PCB layout modification.

Q: Does the extended temperature range (-40°C to 125°C) matter for my application?

A: This depends on your system requirements. If your application operates only within -40°C to 85°C, parts with the reduced temperature range are suitable. If your system requires operation up to 125°C, select M24M01-DWDW3TP/K or CAV24M01YE-GT3.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original 24LC1026T-E/ST specification.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive industry qualification standard. Parts carrying this qualification (M24M01-DWDW3TP/K and CAV24M01YE-GT3) have undergone additional reliability testing and are approved for automotive applications. This qualification is optional for non-automotive applications.

Q: Can I substitute a part with a lower minimum supply voltage?

A: Parts with lower minimum supply voltage (1.7V or 1.8V) can replace the original 2.5V minimum part only if your system supplies voltage within the substitute part's range. The substitute must support your actual operating voltage. For systems supplying 2.5V or higher, all listed parts are compatible.