| Device Name | Atmel AT45D021 |
| Manufacturer | Atmel |
| Part Number | AT45D021 |
| 8-bit Bytes | 270336.0 |
| Vcc(program) | 5.0 |
| Set programming | Yes |
| Memory Regions | nan |
| Electrical Erase | Yes |
| Packages | SOIC(28) |
| Notes | serial FLASH EPROM. The memory is devided into 4 large blocks instead of 1024 small blocks as defined in the spec. Each big block consists of 256 small blocks. |
| Programmer | 1900 |
| Socket Modules | WSM32SA, WASM32SA |
| Device Name with Package | Atmel AT45D021 SOIC(28) |
| Device Name with Package and Adapter | Atmel AT45D021 SOIC(28) WSM32SA, WASM32SA |