| Part Number | 93C66BT-I/SN | 93C66BT-I/ST | 
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | 
| Category | Memory | Memory | 
|   |   | |
| Product Status | Active | Active | 
| Memory Type | Non-Volatile | Non-Volatile | 
| Memory Format | EEPROM | EEPROM | 
| Technology | EEPROM | EEPROM | 
| Memory Size | 4Kb (256 x 16) | 4Kb (256 x 16) | 
| Memory Interface | SPI | SPI | 
| Clock Frequency | 2 MHz | 2 MHz | 
| Write Cycle Time - Word, Page | 2ms | 2ms | 
| Access Time | - | - | 
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 
| Supplier Device Package | 8-SOIC | 8-TSSOP |