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| PartNumber | AT29C020-12PC | AT29C020-12JC | AT29C020-12JU |
| Description | NOR Flash 2M (256kx8) | NOR Flash 2M(256Kx8) 5V ONLY- 120NS COM TEMP | NOR Flash PARALLEL FLASH 2Mbit (256k x 8) - 120NS |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | NOR Flash | NOR Flash | NOR Flash |
| RoHS | N | N | Y |
| Mounting Style | Through Hole | SMD/SMT | SMD/SMT |
| Package / Case | PDIP-32 | PLCC-32 | PLCC-32 |
| Series | AT29C | AT29C | AT29C |
| Memory Size | 2 Mbit | 2 Mbit | 2 Mbit |
| Interface Type | Parallel | Parallel | Parallel |
| Organization | 256 k x 8 | 256 k x 8 | 256 k x 8 |
| Timing Type | Asynchronous | Asynchronous | Asynchronous |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Current Max | 40 mA | 40 mA | 40 mA |
| Minimum Operating Temperature | 0 C | 0 C | - 40 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 85 C |
| Memory Type | NOR | NOR | NOR |
| Speed | 120 ns | 120 ns | 120 ns |
| Architecture | Sector | Sector | Sector |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Product Type | NOR Flash | NOR Flash | NOR Flash |
| Standard | Not Supported | Not Supported | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Unit Weight | 0.078125 oz | - | - |
| Moisture Sensitive | - | Yes | - |
| Factory Pack Quantity | - | 32 | 1920 |
| Part # Aliases | - | - | AT29C020-12JU-T |