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Equivalent & Substitute Parts for 24LC1026-I/SM
Part Overview
The 24LC1026-I/SM is a 1Mbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 8-SOIJ surface mount packaging. This device is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design optimization across compatible applications requiring 1Mbit I2C EEPROM functionality.
Substiute Parts
Key Parameters
| Parameter | 24LC1026-I/SM |
|---|---|
| Memory Size | 1Mbit |
| Memory Organization | 128K x 8 |
| Memory Interface | I2C |
| Clock Frequency | 400 kHz |
| Access Time | 900 ns |
| Write Cycle Time | 5ms |
| Voltage Supply Range | 2.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 8-SOIC (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts are classified based on the following critical parameters that determine functional compatibility:
Primary Compatibility Criteria:
- Memory Size: 1Mbit (128K x 8 organization)
- Memory Interface: I2C protocol
- Memory Format: EEPROM (Non-Volatile)
- Mounting Type: Surface Mount
- Package Category: 8-pin SOIC/SOIJ variants
- RoHS Status: ROHS3 Compliant
Substitution Categories:
Category 1 - MFR Recommended (Direct Substitutes): Parts meeting all primary criteria with verified or active product status, supporting direct replacement in existing designs.
Category 2 - Parametric Equivalents: Parts matching core electrical parameters (1Mbit, I2C, EEPROM) with identical or superior performance characteristics.
Category 3 - Alternative Manufacturers: Parts from different manufacturers (Rohm Semiconductor, onsemi) meeting functional specifications with package variations.
Parameter Comparison
| Part Number | Manufacturer | Memory Size | Clock Frequency | Access Time | Voltage Supply | Operating Temp | Package | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|
| 24LC1026-I/SM | Microchip Technology | 1Mbit | 400 kHz | 900 ns | 2.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIJ (5.30mm) | Active | 3100 Pcs |
| 24AA1025-I/SM | Microchip Technology | 1Mbit | 400 kHz | 900 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-SOIJ (5.30mm) | Active | 5599 Pcs |
| 24FC1025-I/SM | Microchip Technology | 1Mbit | 1 MHz | 400 ns | 1.8V ~ 5.5V | -40°C ~ 85°C | 8-SOIJ (5.30mm) | Active | 4480 Pcs |
| 24LC1025-E/SM | Microchip Technology | 1Mbit | 400 kHz | 900 ns | 2.5V ~ 5.5V | -40°C ~ 125°C | 8-SOIJ (5.30mm) | Active | 2200 Pcs |
| 24LC1026-E/SM | Microchip Technology | 1Mbit | 400 kHz | 900 ns | 2.5V ~ 5.5V | -40°C ~ 125°C | 8-SOIJ (5.30mm) | Active | 3200 Pcs |
| AT24CM01-SHD-B | Microchip Technology | 1Mbit | 1 MHz | 550 ns | 2.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC (5.30mm) | Active | 3700 Pcs |
| AT24CM01-SHM-B | Microchip Technology | 1Mbit | 1 MHz | 550 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-SOIC (5.30mm) | Active | 1733 Pcs |
| 24LC1025-I/SM | Microchip Technology | 1Mbit | 400 kHz | 900 ns | 2.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIJ (5.30mm) | Active | 3370 Pcs |
| BR24G1MF-3AGTE2 | Rohm Semiconductor | 1Mbit | 1 MHz | Not specified | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-SOP (4.40mm) | Active | 7473 Pcs |
| BR24G1MFJ-3AGTE2 | Rohm Semiconductor | 1Mbit | 1 MHz | Not specified | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-SOP-J (3.90mm) | Active | 3675 Pcs |
| CAT24M01WI-GT3 | onsemi | 1Mbit | 1 MHz | 400 ns | 1.8V ~ 5.5V | -40°C ~ 85°C | 8-SOIC (3.90mm) | Active | 17169 Pcs |
Engineering Selection Recommendations
Direct Substitutes (Microchip Technology - Same Package Family):
24AA1025-I/SM and 24LC1025-I/SM are parametric equivalents with identical electrical specifications to the 24LC1026-I/SM. Both maintain 400 kHz I2C operation, 900 ns access time, and 8-SOIJ packaging. The 24AA1025-I/SM offers extended lower voltage operation (1.7V minimum) and higher inventory availability (5599 Pcs). Selection between these parts depends on voltage supply constraints in the target application.
Enhanced Performance Alternatives (Microchip Technology):
24FC1025-I/SM provides 1 MHz clock frequency operation with 400 ns access time, representing improved performance over the 400 kHz baseline. This part maintains 8-SOIJ packaging and supports applications requiring faster I2C bus speeds. Extended temperature variants (24LC1025-E/SM, 24LC1026-E/SM) operate to 125°C, suitable for industrial temperature range requirements.
Cross-Manufacturer Alternatives:
AT24CM01-SHD-B and AT24CM01-SHM-B (Microchip AT series) offer 1 MHz operation with 550 ns access time in 8-SOIC packaging. CAT24M01WI-GT3 (onsemi) provides 1 MHz operation with 400 ns access time in compact 8-SOIC (3.90mm) package, supporting space-constrained designs.
Rohm Semiconductor BR24G1 series (BR24G1MF-3AGTE2, BR24G1MFJ-3AGTE2) delivers 1 MHz I2C operation with compact 8-SOP packaging (4.40mm and 3.90mm widths respectively), suitable for high-density PCB layouts.
All substitute parts maintain ROHS3 compliance and Active product status, ensuring long-term availability and regulatory alignment.
Frequently Asked Questions (FAQ)
Q: Can 24AA1025-I/SM directly replace 24LC1026-I/SM in existing designs?
A: Yes. Both parts share identical memory capacity (1Mbit), I2C interface (400 kHz), access time (900 ns), and 8-SOIJ packaging. The 24AA1025-I/SM extends lower voltage operation to 1.7V, making it compatible with all applications supporting the 24LC1026-I/SM voltage range (2.5V ~ 5.5V).
Q: What is the difference between 400 kHz and 1 MHz clock frequency variants?
A: Clock frequency determines I2C bus speed. 400 kHz parts (24LC1026-I/SM, 24AA1025-I/SM, 24LC1025-E/SM) operate at standard I2C speed. 1 MHz variants (24FC1025-I/SM, AT24CM01 series, CAT24M01WI-GT3, BR24G1 series) support fast I2C mode, enabling faster data transfer rates. Selection depends on system I2C bus configuration and timing requirements.
Q: Are package variations (SOIJ vs. SOIC vs. SOP) interchangeable?
A: Package variants are not directly interchangeable on PCB layouts. SOIJ, SOIC, and SOP packages have different physical dimensions and pin spacing. PCB footprint design must match the selected package type. However, all variants maintain 8-pin configuration and identical electrical pinout, allowing functional substitution with PCB redesign.
Q: Which substitute offers the best inventory availability?
A: CAT24M01WI-GT3 (onsemi) provides the highest inventory level at 17,169 Pcs. For Microchip parts, 24AA1025-I/SM offers 5,599 Pcs. Rohm BR24G1MF-3AGTE2 provides 7,473 Pcs. Selection should balance availability with electrical and package requirements.
Q: Do all substitutes support the same operating temperature range?
A: No. Standard variants operate -40°C ~ 85°C. Extended temperature versions (24LC1025-E/SM, 24LC1026-E/SM) operate -40°C ~ 125°C. Application temperature requirements determine which parts are suitable.
Q: What compliance certifications apply to all substitute parts?
A: All listed parts maintain ROHS3 compliance and REACH Unaffected status. ECCN classifications vary by manufacturer (EAR99 for Microchip and Rohm; 3A991B1B2 for AT24CM01 series). Verify ECCN requirements for export compliance in target markets.
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