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| Part Number | CAT24S128C4ATR |
| Description | IC EEPROM 128K I2C 1MHZ 4WLCSP |
| Manufacturer | ON Semiconductor |
| Series | - |
| Part Status | Active |
| Memory Type | Non-Volatile |
| Memory Format | EEPROM |
| Technology | EEPROM |
| Memory Size | 128K (16K x 8) |
| Clock Frequency | 1MHz |
| Write Cycle Time - Word, Page | 5ms |
| Access Time | 400ns |
| Memory Interface | I²C |
| Voltage - Supply | 1.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 4-XFBGA, WLCSP |
| Supplier Device Package | 4-WLCSP (0.84x0.84) |