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| TYPE | DESCRIPTION |
| Mfr | Microchip Technology |
| Series | - |
| Package | Tube |
| Part Status | Obsolete |
| Memory Type | Non-Volatile |
| Memory Format | EEPROM |
| Technology | EEPROM |
| Memory Size | 256Kb (32K x 8) |
| Memory Interface | Parallel |
| Write Cycle Time - Word, Page | 3ms |
| Access Time | 90 ns |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C (TC) |
| Mounting Type | Surface Mount |
| Package / Case | 28-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 28-SOIC |
| Base Product Number | AT28HC256 |
