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| Part Number | 25LC256XT-I/ST | 25LC256T-I/ST | 25LC256X-I/ST | 25LC256XT-E/ST | 
|---|---|---|---|---|
| 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 | 256Kb (32K x 8) | 256Kb (32K x 8) | 256Kb (32K x 8) | 256Kb (32K x 8) | 
| Memory Interface | SPI | SPI | SPI | SPI | 
| Clock Frequency | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 
| Write Cycle Time - Word, Page | 5ms | 5ms | 5ms | 5ms | 
| Access Time | - | - | - | - | 
| Voltage - Supply | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | 
| Package / Case | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 
| Supplier Device Package | 8-TSSOP | 8-TSSOP | 8-TSSOP | 8-TSSOP |