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| Part Number | AT28HC256F-12UM/883 | AT28HC256-12UM/883 | AT28HC256E-12UM/883 | AT28HC256F-12DM/883 | AT28HC256F-12FM/883 | AT28HC256F-12LM/883 |
|---|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Obsolete | Active | Active | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile | Non-Volatile | Non-Volatile | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM | EEPROM | EEPROM | EEPROM | EEPROM |
| Technology | EEPROM | 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) | 256Kb (32K x 8) |
| Memory Interface | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| Clock Frequency | - | - | - | - | - | - |
| Write Cycle Time - Word, Page | 3ms | 10ms | 10ms | 3ms | 3ms | 3ms |
| Access Time | 120 ns | 120 ns | 120 ns | 120 ns | 120 ns | 120 ns |
| Voltage - Supply | 4.5V ~ 5.5V | 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) | -55°C ~ 125°C (TC) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Surface Mount | Surface Mount |
| Package / Case | 28-BCPGA | 28-BCPGA | 28-BCPGA | 28-CDIP (0.600", 15.24mm) | 28-CFlatPack | 32-CLCC |
| Supplier Device Package | 28-CPGA (13.97x16.51) | 28-CPGA (13.97x16.51) | 28-CPGA (13.97x16.51) | 28-CERDIP | 28-FlatPack, Ceramic Bottom-Brazed | 32-LCC (11.43x13.97) |
