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| PartNumber | M87C257-12F1 | M87C257-12F1L | M87C257-12F3 |
| Description | IC EPROM 256K PARALLEL 28CDIP | ||
| Manufacturer | STMicroelectronics | - | - |
| Product Category | IC Chips | - | - |
| Series | - | - | - |
| Packaging | Tube | - | - |
| Package Case | 28-CDIP (0.600", 15.24mm) Window | - | - |
| Operating Temperature | 0°C ~ 70°C (TA) | - | - |
| Interface | Parallel | - | - |
| Voltage Supply | 4.5 V ~ 5.5 V | - | - |
| Supplier Device Package | 28-CDIP Frit Seal with Window | - | - |
| Memory Size | 256K (32K x 8) | - | - |
| Memory Type | EPROM UV | - | - |
| Speed | 120ns | - | - |
| Format Memory | EPROMs | - | - |