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| PartNumber | AT29C256-12PC | AT29C256-15PC |
| Description | NOR Flash 256k (32kx8) | NOR Flash 256k (32kx8) NRND |
| Manufacturer | Microchip | Microchip |
| Product Category | NOR Flash | NOR Flash |
| RoHS | N | N |
| Mounting Style | Through Hole | Through Hole |
| Package / Case | PDIP-28 | PDIP-28 |
| Series | AT29C | AT29C |
| Memory Size | 256 kbit | 256 kbit |
| Interface Type | Parallel | Parallel |
| Organization | 32 k x 8 | 32 k x 8 |
| Timing Type | Asynchronous | Asynchronous |
| Data Bus Width | 8 bit | 8 bit |
| Supply Voltage Min | 4.5 V | 4.5 V |
| Supply Voltage Max | 5.5 V | 5.5 V |
| Supply Current Max | 50 mA | 50 mA |
| Minimum Operating Temperature | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C |
| Memory Type | NOR | NOR |
| Speed | 120 ns | 150 ns |
| Architecture | Sector | Sector |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Product Type | NOR Flash | NOR Flash |
| Standard | Not Supported | Not Supported |
| Subcategory | Memory & Data Storage | Memory & Data Storage |
| Unit Weight | 0.147798 oz | 0.147798 oz |