| PartNumber | AT27C256R-45TU | AT27C256R-45TI | AT27C256R-45TC |
| Description | EPROM 256Kb (32Kx8) OTP 5V 45ns | EPROM 256Kb (32Kx8) OTP 5V 45ns | IC EPROM 256K PARALLEL 28TSOP |
| Manufacturer | Microchip | Microchip | - |
| Product Category | EPROM | EPROM | - |
| RoHS | Y | N | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | TSOP-28 | TSOP-28 | - |
| Type | OTP | OTP | - |
| Memory Size | 256 kb | 256 kb | - |
| Organization | 32 k x 8 | 32 k x 8 | - |
| Interface Type | Parallel | Parallel | - |
| Operating Supply Current | 20 mA | 20 mA | - |
| Programming Voltage | 13 V | 13 V | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Series | AT27C256R | AT27C256R | - |
| Access Time | 45 ns | 45 ns | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Operating Supply Voltage | 5 V | 5 V | - |
| Output Enable Access Time | 20 ns | 20 ns | - |
| Product Type | EPROM | EPROM | - |
| Factory Pack Quantity | 234 | 234 | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | - |