| M87C257 | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC | 
                                        
                                                                            
                                            | M87C257-10C1TR | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC | 
                                        
                                                                            
                                            | M87C257-10C3TR | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC | 
                                        
                                                                            
                                            | M87C257-10C6TR | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC | 
                                        
                                                                            
                                            | M87C257-10F1 | 
                                            STMicroelectronics | 
                                            M87C257-10F1 STM IC ORIGINAL | 
                                        
                                                                            
                                            | M87C257-10F1TR | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC | 
                                        
                                                                            
                                            | M87C257-10F3 | 
                                            STMicroelectronics | 
                                            M87C257-10F3 STM IC DIP | 
                                        
                                                                            
                                            | M87C257-10F3TR | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC | 
                                        
                                                                            
                                            | M87C257-10F6 | 
                                            STMicroelectronics | 
                                            M87C257-10F6 STM IC DIP | 
                                        
                                                                            
                                            | M87C257-10F6TR | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC | 
                                        
                                                                            
                                            | M87C257-10XC1TR | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC | 
                                        
                                                                            
                                            | M87C257-10XC3TR | 
                                            STMicroelectronics | 
                                            Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM IC |