| PartNumber | AT28HC256E-12TU | AT28HC256E-12TU-T | AT28HC256E-12TI |
| Description | EEPROM Parallel EEPROM 5V-120NS, 883c, GR | EEPROM 120NS, TSOP, IND TEMP, GREEN | EEPROM 256K HI-ENDURANCE SDP-120NS IND TEMP |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | EEPROM | EEPROM | EEPROM |
| RoHS | Y | Y | N |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TSOP-28 | TSOP-28 | TSOP-28 |
| Memory Size | 256 kbit | 256 kbit | 256 kbit |
| Organization | 32 k x 8 | 32 k x 8 | 32 k x 8 |
| Interface Type | Parallel | Parallel | Serial, 4-Wire, SDI, SPI |
| Access Time | 120 ns | 120 ns | 70 ns |
| Data Retention | 10 Year | 10 Year | 10 Year |
| Supply Current Max | 80 mA | 80 mA | 80 mA |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Series | AT28HC256 | AT28HC256 | AT28HC256 |
| Packaging | Tray | Reel | - |
| Height | 1 mm | - | 1 mm |
| Length | 8 mm | - | 8 mm |
| Width | 11.8 mm | - | 11.8 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Moisture Sensitive | Yes | - | - |
| Operating Supply Current | 80 mA | 80 mA | 80 mA |
| Operating Supply Voltage | 5 V | 4.5 V to 5.5 V | 5 V |
| Output Enable Access Time | 50 ns | - | 50 ns |
| Product Type | EEPROM | EEPROM | EEPROM |
| Programming Voltage | 4.5 V to 5.5 V | - | 4.5 V to 5.5 V |
| Factory Pack Quantity | 234 | 2000 | 234 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |