| Parameters | 
                                                                                                                        
                                                | Mfr | Analog Devices Inc./Maxim Integrated | 
                                                                                    
                                                | Series | - | 
                                                                                    
                                                | Package | Tube | 
                                                                                    
                                                | Product Status | Obsolete | 
                                                                                    
                                                | Conevo-Key Programmable | Not Verified | 
                                                                                    
                                                | Type | Clock/Calendar | 
                                                                                    
                                                | Features | Leap Year, NVSRAM | 
                                                                                    
                                                | Memory Size | 32KB | 
                                                                                    
                                                | Time Format | HH:MM:SS (24 hr) | 
                                                                                    
                                                | Date Format | YY-MM-DD-dd | 
                                                                                    
                                                | Interface | Parallel | 
                                                                                    
                                                | Voltage - Supply | 4.5V ~ 5.5V | 
                                                                                    
                                                | Voltage - Supply, Battery | 3V | 
                                                                                    
                                                | Current - Timekeeping (Max) | 4mA @ 4.5V ~ 5.5V | 
                                                                                    
                                                | Operating Temperature | 0°C ~ 70°C | 
                                                                                    
                                                | Mounting Type | Surface Mount | 
                                                                                    
                                                | Package / Case | 34-PowerCap™ Module | 
                                                                                    
                                                | Supplier Device Package | 34-PowerCap Module | 
                                                                                    
                                                | Base Product Number | DS1644 | 
                                                                                    
                                                | RoHS Status | RoHS non-compliant | 
                                                                                    
                                                | Moisture Sensitivity Level (MSL) | 3  (168 Hours) | 
                                                                                    
                                                | REACH Status | REACH Unaffected | 
                                                                                    
                                                | ECCN | EAR99 | 
                                                                                    
                                                | HTSUS | 8542.39.0001 | 
                                                                                    
                                                | Other Names | DS1644P120 | 
                                                                                    
                                                | Standard Package | 40 | 
                                                                                                                
                                
                             
                                                Real Time Clock (RTC) IC Clock/Calendar 32KB Parallel 34-PowerCap™ Module