| Parameters | 
                                                                                                                        
                                                | Mfr | Fairchild Semiconductor | 
                                                                                    
                                                | Series | - | 
                                                                                    
                                                | Package | Tube | 
                                                                                    
                                                | Product Status | Obsolete | 
                                                                                    
                                                | Memory Type | Non-Volatile | 
                                                                                    
                                                | Memory Format | EPROM | 
                                                                                    
                                                | Technology | EPROM - UV | 
                                                                                    
                                                | Memory Size | 256Kbit | 
                                                                                    
                                                | Memory Organization | 32K x 8 | 
                                                                                    
                                                | Memory Interface | Parallel | 
                                                                                    
                                                | Write Cycle Time - Word, Page | - | 
                                                                                    
                                                | Access Time | 120 ns | 
                                                                                    
                                                | 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 | 
                                                                                    
                                                | Base Product Number | FM27C256 | 
                                                                                    
                                                | RoHS Status | RoHS non-compliant | 
                                                                                    
                                                | ECCN | EAR99 | 
                                                                                    
                                                | HTSUS | 8542.32.0061 | 
                                                                                    
                                                | Standard Package | 12 | 
                                                                                                                
                                
                             
                                                EPROM - UV Memory IC 256Kbit Parallel 120 ns 28-CDIP