| Parameters | 
                                                                                                                        
                                                | Mfr | Microchip Technology | 
                                                                                    
                                                | Series | - | 
                                                                                    
                                                | Package | Tube | 
                                                                                    
                                                | Product Status | Active | 
                                                                                    
                                                | Memory Type | Non-Volatile | 
                                                                                    
                                                | Memory Format | EEPROM | 
                                                                                    
                                                | Technology | EEPROM | 
                                                                                    
                                                | Memory Size | 256Kbit | 
                                                                                    
                                                | Memory Organization | 32K x 8 | 
                                                                                    
                                                | Memory Interface | Parallel | 
                                                                                    
                                                | Write Cycle Time - Word, Page | 3ms | 
                                                                                    
                                                | Access Time | 150 ns | 
                                                                                    
                                                | Voltage - Supply | 4.5V ~ 5.5V | 
                                                                                    
                                                | Operating Temperature | -40°C ~ 85°C (TC) | 
                                                                                    
                                                | Mounting Type | Surface Mount | 
                                                                                    
                                                | Package / Case | 28-SOIC (0.295", 7.50mm Width) | 
                                                                                    
                                                | Supplier Device Package | 28-SOIC | 
                                                                                    
                                                | Base Product Number | AT28C256 | 
                                                                                    
                                                | RoHS Status | ROHS3 Compliant | 
                                                                                    
                                                | Moisture Sensitivity Level (MSL) | 3  (168 Hours) | 
                                                                                    
                                                | REACH Status | REACH Unaffected | 
                                                                                    
                                                | ECCN | EAR99 | 
                                                                                    
                                                | HTSUS | 8542.32.0051 | 
                                                                                    
                                                | Standard Package | 27 | 
                                                                                                                
                                
                             
                                                EEPROM Memory IC 256Kbit Parallel 150 ns 28-SOIC