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| Part Number | X28HC256WC6721 |
| Description | IC EEPROM 256KBIT |
| Manufacturer | Renesas Electronics America Inc. |
| Series | - |
| Part Status | Obsolete |
| Memory Type | Non-Volatile |
| Memory Format | EEPROM |
| Technology | EEPROM |
| Memory Size | 256Kb (32K x 8) |
| Clock Frequency | - |
| Write Cycle Time - Word, Page | 5ms |
| Access Time | - |
| Memory Interface | Parallel |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | - |
| Mounting Type | - |
| Package / Case | - |
| Supplier Device Package | - |