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| Part Number | AT28C256-20LM/883-815 | AT28C256-25LM/883-815 | AT28C256-20UM/883-815 | AT28C256-20DM/883-815 | AT28C256-20FM/883-815 |
|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Active | Active | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile | Non-Volatile | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM | EEPROM | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM | EEPROM | EEPROM | EEPROM |
| Memory Size | 256Kb (32K x 8) | 256Kb (32K x 8) | 256Kb (32K x 8) | 256Kb (32K x 8) | 256Kb (32K x 8) |
| Memory Interface | Parallel | Parallel | Parallel | Parallel | Parallel |
| Clock Frequency | - | - | - | - | - |
| Write Cycle Time - Word, Page | 10ms | 10ms | 10ms | 10ms | 10ms |
| Access Time | 200 ns | 250 ns | 200 ns | 200 ns | 200 ns |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TC) | -55°C ~ 125°C (TC) | -55°C ~ 125°C (TC) | -55°C ~ 125°C (TC) | -55°C ~ 125°C (TC) |
| Mounting Type | Surface Mount | Surface Mount | Through Hole | Through Hole | Surface Mount |
| Package / Case | 32-CLCC | 32-CLCC | 28-BCPGA | 28-CDIP (0.600", 15.24mm) | 28-CFlatPack |
| Supplier Device Package | 32-LCC (11.43x13.97) | 32-LCC (11.43x13.97) | 28-CPGA (13.97x16.51) | 28-CERDIP | 28-FlatPack, Ceramic Bottom-Brazed |
