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| Part Number | 24LC21T/SN | 24LC21/SN | 24LC21A/SN | 24LC21AT/SN |
|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Active | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM | EEPROM | EEPROM |
| Memory Size | 1Kb (128 x 8) | 1Kb (128 x 8) | 1Kb (128 x 8) | 1Kb (128 x 8) |
| Memory Interface | I²C | I²C | I²C | I²C |
| Clock Frequency | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Write Cycle Time - Word, Page | 10ms | 10ms | 10ms | 10ms |
| Access Time | 900 ns | 900 ns | 900 ns | 900 ns |
| Voltage - Supply | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
