| PartNumber | 25AA640AT-E/MNY | 25AA640AT-E/MS | 25AA640AT-E/SN |
| Description | EEPROM 64K, 8K X 8, 1.8V SER EE EXT | EEPROM 64K, 8K X 8, 1.8V SER EE EXT | EEPROM 64K, 8K X 8, 1.8V SER EE EXT |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | EEPROM | EEPROM | EEPROM |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TDFN-8 | MSOP-8 | SOIC-8 |
| Memory Size | 64 kbit | 64 kbit | 64 kbit |
| Organization | 8 k x 8 | 8 k x 8 | 8 k x 8 |
| Interface Type | Serial, 4-Wire, SDI, SPI | Serial, 4-Wire, SDI, SPI | Serial, 4-Wire, SDI, SPI |
| Data Retention | 200 Year | 200 Year | 200 Year |
| Packaging | Reel | Reel | Reel |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Type | EEPROM | EEPROM | EEPROM |
| Factory Pack Quantity | 3300 | 2500 | 3300 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Unit Weight | 0.001764 oz | 0.004938 oz | 0.019048 oz |
| Moisture Sensitive | - | - | Yes |