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| PartNumber | AT28HC256E-12SU | AT28HC256E-12SI | AT28HC256E-12SU-202 |
| Description | EEPROM Parallel EEPROM 5V-120NS, 883c, GR | EEPROM 256K HI-ENDURANCE SDP-120NS IND TEMP | IC EEPROM 256K PARALLEL 28SOIC |
| Manufacturer | Microchip | Microchip | - |
| Product Category | EEPROM | EEPROM | - |
| RoHS | Y | N | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | SOIC-28 | SOIC-28 | - |
| Memory Size | 256 kbit | 256 kbit | - |
| Organization | 32 k x 8 | 32 k x 8 | - |
| Interface Type | Parallel | Serial, 4-Wire, SDI, SPI | - |
| Access Time | 120 ns | 70 ns | - |
| Data Retention | 10 Year | 10 Year | - |
| Supply Current Max | 80 mA | 80 mA | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Series | AT28HC256 | AT28HC256 | - |
| Packaging | Tube | - | - |
| Height | 2.35 mm (Max) | 2.35 mm (Max) | - |
| Length | 18.1 mm (Max) | 18.1 mm (Max) | - |
| Width | 7.6 mm (Max) | 7.6 mm (Max) | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Moisture Sensitive | Yes | - | - |
| Operating Supply Current | 80 mA | 80 mA | - |
| Operating Supply Voltage | 5 V | 5 V | - |
| Output Enable Access Time | 50 ns | 50 ns | - |
| Product Type | EEPROM | EEPROM | - |
| Programming Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | - |
| Factory Pack Quantity | 27 | 27 | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | - |