| PartNumber | AT28C256-15SU-T | AT28C256-15TU-T | AT28C256-15TU |
| Description | EEPROM 150NS, SOIC, IND TEMP, GREEN | EEPROM 150NS, TSOP, IND TEMP, GREEN | EEPROM 256K 32K x 8 150 ns 4.5V-5.5V |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | EEPROM | EEPROM | EEPROM |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOIC-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 | Parallel |
| Access Time | 150 ns | 150 ns | 150 ns |
| Data Retention | 10 Year | 10 Year | 10 Year |
| Supply Current Max | 50 mA | 50 mA | 50 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 | AT28C256 | AT28C256 | AT28C256 |
| Packaging | Reel | Reel | Tray |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Moisture Sensitive | Yes | Yes | Yes |
| Operating Supply Current | 50 mA | - | - |
| Operating Supply Voltage | 5 V | 5 V | 5 V |
| Product Type | EEPROM | EEPROM | EEPROM |
| Factory Pack Quantity | 1000 | 2000 | 234 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Maximum Clock Frequency | - | - | 6.67 MHz |
| Height | - | - | 1 mm |
| Length | - | - | 8 mm |
| Width | - | - | 11.8 mm |
| Output Enable Access Time | - | - | 70 ns |
| Programming Voltage | - | - | 5 V |
| Unit Weight | - | - | 0.008187 oz |