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| Part Number | M27C512-90F1 | 
| Datasheet | M27C512-90F1 datasheet | 
| Description | IC EPROM 512K PARALLEL 28CDIP | 
| Manufacturer | STMicroelectronics | 
| Series | - | 
| Part Status | Obsolete | 
| Memory Type | Non-Volatile | 
| Memory Format | EPROM | 
| Technology | EPROM - UV | 
| Memory Size | 512Kb (64K x 8) | 
| Clock Frequency | - | 
| Write Cycle Time - Word, Page | - | 
| Access Time | 90ns | 
| Memory Interface | Parallel | 
| Voltage - Supply | 4.5V ~ 5.5V | 
| Operating Temperature | 0°C ~ 70°C (TA) | 
| Mounting Type | Through Hole | 
| Package / Case | 28-CDIP (0.600", 15.24mm) Window | 
| Supplier Device Package | 28-CDIP Frit Seal with Window |