| PartNumber | AT28C256-20DM/883-815 | AT28C256-20DM/883 | AT28C256-20FM/883 |
| Description | EEPROM 200NS CERDIP | EEPROM 256K 11MIL GRIND - 200NS | EEPROM 256K 11MIL GRIND - 200NS |
| Manufacturer | Microchip | ON Semiconductor | Microchip |
| Product Category | EEPROM | EEPROM | EEPROM |
| RoHS | Y | Y | N |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TSSOP-8 | SOIC-8 | DBGA2-8 |
| Memory Size | 32 kbit | 8 kbit | 2 kbit |
| Organization | 4 k x 8 | 1 k x 8 | 256 x 8, 128 x 16 |
| Interface Type | Serial | Serial, 2-Wire, I2C | Serial, 3-Wire, Microwire |
| Data Retention | 200 Year | 100 Year | 100 Year |
| Maximum Clock Frequency | 1 MHz | 0.4 MHz | 0.25 MHz |
| Supply Current Max | 1 mA | 3 mA | 2 mA |
| Supply Voltage Min | 1.6 V | 2.5 V | 1.8 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 | 24CW320 | CAT24C208 | - |
| Packaging | Tube | Tube | - |
| Brand | Microchip Technology | ON Semiconductor | Microchip Technology / Atmel |
| Operating Supply Voltage | 1.6 V to 5.5 V | 3.3 V, 5 V | 2.5 V, 3.3 V, 5 V |
| Product Type | EEPROM | EEPROM | EEPROM |
| Factory Pack Quantity | 100 | 100 | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Access Time | - | 900 ns | - |
| Height | - | 1.5 mm (Max) | 0.66 mm |
| Length | - | 5 mm (Max) | 2 mm |
| Width | - | 4 mm (Max) | 1.5 mm |
| Operating Supply Current | - | 3 mA | 2 mA |
| Unit Weight | - | 0.019048 oz | - |