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25AA080AT-I/MS EEPROM Memory IC Equivalent & Substitute Parts
Part Overview
The 25AA080AT-I/MS is an 8Kbit SPI EEPROM memory IC manufactured by Microchip Technology, designed for non-volatile data storage applications requiring low-power operation across industrial temperature ranges. This device operates at 10 MHz clock frequency with 1.8V to 5.5V supply voltage compatibility and is packaged in 8-MSOP surface mount configuration. The part is currently active in production with RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Memory Size | 8Kbit |
| Memory Organization | 1K x 8 |
| Memory Interface | SPI |
| Clock Frequency | 10 MHz |
| Write Cycle Time | 5ms |
| Voltage Supply Range | 1.8V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Package Type | 8-MSOP (0.118", 3.00mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the 25AA080AT-I/MS is determined by the following critical parameters:
Primary Compatibility Criteria:
- Memory capacity: 8Kbit
- Memory organization: 1K x 8
- Interface protocol: SPI
- Package type: 8-MSOP or 8-TSSOP (mechanically compatible pinouts)
- Supply voltage range: Must encompass or be contained within 1.8V ~ 5.5V
- Operating temperature range: Must encompass or be contained within -40°C ~ 85°C
- Write cycle time: 5ms maximum
Substitution Groups:
Group 1 - Direct Pin-Compatible (8-MSOP Package): Parts maintaining identical 8-MSOP packaging with matching electrical specifications. 25AA080CT-I/MS and BR25H080FVM-2CTR qualify as direct substitutes with no layout modifications required.
Group 2 - Package-Compatible (8-TSSOP Package): Parts using 8-TSSOP packaging with identical pinout functionality. AT25080B-XHL-B, AT25080B-XHL-T, CAT25080YI-GT3, CAV25080YE-GT3, M95080-DFDW6TP, M95080-RDW6TP, and M95080-WDW6TP are mechanically compatible with PCB layout adjustments for different package dimensions.
Voltage and Temperature Considerations: Parts with expanded voltage ranges (2.5V ~ 5.5V) or extended temperature ratings (-40°C ~ 125°C) are backward compatible with the 25AA080AT-I/MS operating envelope but may not be necessary for all applications.
Parameter Comparison
| Part Number | Manufacturer | Memory Size | Clock Frequency | Package | Voltage Supply | Operating Temp | Write Cycle | MSL Rating | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 25AA080AT-I/MS | Microchip | 8Kbit | 10 MHz | 8-MSOP | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 1 | Industrial |
| 25AA080CT-I/MS | Microchip | 8Kbit | 10 MHz | 8-MSOP | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 1 | Industrial |
| AT25080B-XHL-B | Microchip | 8Kbit | 20 MHz | 8-TSSOP | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 3 | Industrial |
| AT25080B-XHL-T | Microchip | 8Kbit | 20 MHz | 8-TSSOP | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 3 | Industrial |
| BR25H080FVM-2CTR | Rohm | 8Kbit | 10 MHz | 8-MSOP | 2.5V ~ 5.5V | -40°C ~ 125°C | 4ms | 1 | Automotive |
| CAT25080YI-GT3 | onsemi | 8Kbit | Not Specified | 8-TSSOP | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 1 | Industrial |
| CAV25080YE-GT3 | onsemi | 8Kbit | 20 MHz | 8-TSSOP | 2.5V ~ 5.5V | -40°C ~ 125°C | 5ms | 1 | Automotive |
| M95080-DFDW6TP | STMicroelectronics | 8Kbit | 20 MHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 5ms | 1 | Industrial |
| M95080-RDW6TP | STMicroelectronics | 8Kbit | 20 MHz | 8-TSSOP | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 1 | Industrial |
| M95080-WDW6TP | STMicroelectronics | 8Kbit | 20 MHz | 8-TSSOP | 2.5V ~ 5.5V | -40°C ~ 85°C | 5ms | 1 | Industrial |
Engineering Selection Recommendations
Direct Replacement (No Layout Changes Required): 25AA080CT-I/MS is the primary substitute, maintaining identical 8-MSOP packaging and electrical specifications. Both parts are Microchip Technology products with active production status and RoHS3 compliance.
Package-Compatible Substitutes (Layout Adjustment Required): AT25080B-XHL-T and M95080-RDW6TP provide equivalent functionality with 8-TSSOP packaging. Both maintain the 1.8V ~ 5.5V supply range and -40°C ~ 85°C operating temperature of the original part. M95080-RDW6TP offers higher inventory availability (33,400 units) compared to alternatives.
Automotive-Grade Alternatives: BR25H080FVM-2CTR (Rohm) and CAV25080YE-GT3 (onsemi) are AEC-Q100 qualified automotive-grade parts with extended temperature ratings (-40°C ~ 125°C). These are suitable for applications requiring automotive qualification or enhanced temperature performance. BR25H080FVM-2CTR maintains 8-MSOP packaging; CAV25080YE-GT3 uses 8-TSSOP.
Higher Clock Frequency Options: AT25080B-XHL-T, CAV25080YE-GT3, M95080-DFDW6TP, M95080-RDW6TP, and M95080-WDW6TP operate at 20 MHz, providing double the clock frequency of the original 25AA080AT-I/MS. These are backward compatible for applications not requiring the higher speed.
Moisture Sensitivity Consideration: AT25080B-XHL-B and AT25080B-XHL-T carry MSL-3 rating (168 hours) versus MSL-1 (unlimited) for the original part. This affects storage and handling requirements in high-humidity environments.
Frequently Asked Questions (FAQ)
Q: Can I use AT25080B-XHL-T as a direct replacement for 25AA080AT-I/MS? A: AT25080B-XHL-T is electrically compatible but uses 8-TSSOP packaging instead of 8-MSOP. PCB layout modifications are required due to different package dimensions (0.173" vs 0.118" width). Pin functionality and electrical specifications are compatible.
Q: What is the difference between 25AA080CT-I/MS and 25AA080AT-I/MS? A: Both parts are identical in electrical specifications and 8-MSOP packaging. The difference is packaging format: CT indicates Cut Tape & Digi-Reel, while AT indicates Cut Tape. Functional performance is equivalent.
Q: Is BR25H080FVM-2CTR suitable for industrial applications? A: BR25H080FVM-2CTR is automotive-grade (AEC-Q100 qualified) with extended temperature range (-40°C ~ 125°C). It exceeds industrial requirements and is suitable for both automotive and industrial applications. The 2.5V minimum supply voltage is slightly higher than the original part's 1.8V minimum.
Q: Why do some substitutes have 20 MHz clock frequency instead of 10 MHz? A: Higher clock frequency is a performance enhancement that maintains backward compatibility. Applications designed for 10 MHz operation function correctly with 20 MHz parts; the higher speed is not required but does not cause incompatibility.
Q: What packaging considerations apply when switching from 8-MSOP to 8-TSSOP? A: Both packages are 8-pin surface mount with identical pinout functionality. Physical dimensions differ: 8-MSOP is 0.118" width, 8-TSSOP is 0.173" width. PCB footprints must be updated accordingly, but no electrical modifications are necessary.
Q: Are all substitute parts RoHS3 compliant? A: All listed substitute parts carry RoHS3 compliance status, matching the original 25AA080AT-I/MS specification.
Q: Can I use M95080-DFDW6TP with 1.7V minimum supply voltage in a 1.8V system? A: M95080-DFDW6TP specifies 1.7V ~ 5.5V supply range, which encompasses 1.8V operation. The part is compatible with 1.8V minimum systems.
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