| Parameters | 
                                                                                                                        
                                                | Mfr | STMicroelectronics | 
                                                                                    
                                                | Series | - | 
                                                                                    
                                                | Package | Tube | 
                                                                                    
                                                | Product Status | Obsolete | 
                                                                                    
                                                | Conevo-Key Programmable | Not Verified | 
                                                                                    
                                                | Type | Clock/Calendar | 
                                                                                    
                                                | Features | Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer | 
                                                                                    
                                                | Memory Size | 128B | 
                                                                                    
                                                | Time Format | HH:MM:SS:hh (24 hr) | 
                                                                                    
                                                | Date Format | YY-MM-DD-dd | 
                                                                                    
                                                | Interface | I²C, 2-Wire Serial | 
                                                                                    
                                                | Voltage - Supply | 4.5V ~ 5.5V | 
                                                                                    
                                                | Voltage - Supply, Battery | 2.5V ~ 5.5V | 
                                                                                    
                                                | Current - Timekeeping (Max) | 1mA @ 4.5V ~ 5.5V | 
                                                                                    
                                                | Operating Temperature | -40°C ~ 85°C | 
                                                                                    
                                                | Mounting Type | Surface Mount | 
                                                                                    
                                                | Package / Case | 28-SOIC (0.295", 7.50mm Width) | 
                                                                                    
                                                | Supplier Device Package | 28-SO | 
                                                                                    
                                                | Base Product Number | M41ST | 
                                                                                    
                                                | RoHS Status | ROHS3 Compliant | 
                                                                                    
                                                | Moisture Sensitivity Level (MSL) | 3  (168 Hours) | 
                                                                                    
                                                | REACH Status | REACH Unaffected | 
                                                                                    
                                                | ECCN | EAR99 | 
                                                                                    
                                                | HTSUS | 8542.39.0001 | 
                                                                                    
                                                | Standard Package | 28 | 
                                                                                                                
                                
                             
                                                Real Time Clock (RTC) IC Clock/Calendar 128B I²C, 2-Wire Serial 28-SOIC (0.295", 7.50mm Width)