| PartNumber | AT28C040-20FI | AT28C040-20LI |
| Description | EEPROM 4M SDP - 200NS FLATPACK IND TEMP | EEPROM 4M (512K X 8) SDP - 200NS LCC IND TEMP |
| Manufacturer | Microchip | Microchip |
| Product Category | EEPROM | EEPROM |
| RoHS | N | N |
| Mounting Style | SMD/SMT | SMD/SMT |
| Package / Case | Flatpack-32 | TSSOP-8 |
| Memory Size | 4 Mbit | 4 Mbit |
| Organization | 512 k x 8 | 512 k x 8 |
| Interface Type | Serial, 4-Wire, SDI, SPI | Serial, 4-Wire, SDI, SPI |
| Access Time | 200 ns | 200 ns |
| Data Retention | 10 Year | 10 Year |
| Supply Current Max | 50 mA | 50 mA |
| Supply Voltage Min | 4.5 V | 4.5 V |
| Supply Voltage Max | 5.5 V | 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C |
| Height | 2.57 mm (Max) | 2.74 mm (Max) |
| Length | 21.03 mm (Max) | 16.81 mm (Max) |
| Width | 10.57 mm (Max) | 16.81 mm (Max) |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Operating Supply Current | 50 mA | 50 mA |
| Operating Supply Voltage | 5 V | 2.7 V, 3.6 V |
| Output Enable Access Time | 55 ns | 55 ns |
| Product Type | EEPROM | EEPROM |
| Programming Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Factory Pack Quantity | 15 | 29 |
| Subcategory | Memory & Data Storage | Memory & Data Storage |
| Part # Aliases | AT28C040-20FI-703 | AT28C040-20LI-095 |