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| Part Number | NM93C66ALM8X | NM93C66ALM8 | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | 
| Product Status | Active | Active | 
| Memory Type | Non-Volatile | Non-Volatile | 
| Memory Format | EEPROM | EEPROM | 
| Technology | EEPROM | EEPROM | 
| Memory Size | 4Kb (512 x 8, 256 x 16) | 4Kb (512 x 8, 256 x 16) | 
| Memory Interface | SPI | SPI | 
| Clock Frequency | 250 kHz | 250 kHz | 
| Write Cycle Time - Word, Page | 15ms | 15ms | 
| Access Time | - | - | 
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 
| Supplier Device Package | 8-SOIC | 8-SOIC |