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| PartNumber | M87C257-15C1 | M87C257-15C6 | M87C257-15CI+ |
| Description | IC EPROM 256K PARALLEL 32PLCC | IC EPROM 256K PARALLEL 32PLCC | |
| Manufacturer | STMicroelectronics | - | - |
| Product Category | Memory | - | - |
| Series | - | - | - |
| Packaging | Tube | - | - |
| Package Case | 32-LCC (J-Lead) | - | - |
| Operating Temperature | 0°C ~ 70°C (TA) | - | - |
| Interface | Parallel | - | - |
| Voltage Supply | 4.5 V ~ 5.5 V | - | - |
| Supplier Device Package | 32-PLCC (11.35x13.89) | - | - |
| Memory Size | 256K (32K x 8) | - | - |
| Memory Type | EPROM OTP | - | - |
| Speed | 150ns | - | - |
| Format Memory | EPROMs | - | - |