| Photo | Mfr. Part # | Availability | Price | Quantity | Datasheet | Series | Package/Case | Packaging | Product Status | Programmable | Type | Features | Memory Size | Time Format | Date Format | Interface | Voltage - Supply | Voltage - Supply, Battery | Current - Timekeeping (Max) | Operating Temperature | Mounting Type | Grade | Qualification | Supplier Device Package | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
                 
                 
                
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                    RX-4581NB:B3 ROHSIC RTC CLK/CALENDAR SPI 22SON EPSON  |  
                2,987 | - | 
                
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                       Datasheet  | 	
                
                RX-4581NB | 22-SMD, 20 Leads, Flat Leads | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, SRAM | 16B | HH:MM:SS (24 hr) | YY-MM-DD-dd | SPI | 1.6V ~ 5.5V | - | 0.8µA ~ 1.2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 22-SON | 
                 
                 
                
                 | 
				
                    RTC-4574SA:B ROHSIC RTC CLK/CALENDAR SER 14SOP EPSON  |  
                2,933 | - | 
                
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                       Datasheet  | 	
                
                RTC-4574SA | 14-SOIC (0.197", 5.00mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 3-Wire Serial | 1.6V ~ 5.5V | - | 1µA ~ 2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP | 
                 
                 
                
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                    RX-8025SA:AA:ROHSIC RTC CLK/CALENDAR I2C 14SOP EPSON  |  
                4,706 | - | 
                
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                       Datasheet  | 	
                
                RX-8025SA | 14-SOIC (0.197", 5.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.7V ~ 5.5V | - | 1.2µA ~ 1.8µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP | 
                 
                 
                
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                    RTC-8564JE:ROHSIC RTC CLK/CALENDAR I2C 20VSOJ EPSON  |  
                1,731 | - | 
                
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                       Datasheet  | 	
                
                RTC-8564JE | 20-LSSOJ (0.213", 5.40mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Y2K | - | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.7µA ~ 0.8µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-VSOJ | 
                 
                 
                
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                    RX-4581NB:B0 ROHSIC RTC CLK/CALENDAR SPI 22SON EPSON  |  
                1,537 | - | 
                
                     | 
                  
                  
                    
                       Datasheet  | 	
                
                RX-4581NB | 22-SMD, 20 Leads, Flat Leads | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, SRAM | 16B | HH:MM:SS (24 hr) | YY-MM-DD-dd | SPI | 1.6V ~ 5.5V | - | 0.8µA ~ 1.2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 22-SON | 
                 
                 
                
                 | 
				
                    RX-4581NB:B ROHSIC RTC CLK/CALENDAR SPI 22SON EPSON  |  
                1,492 | - | 
                
                     | 
                  
                  
                    
                       Datasheet  | 	
                
                RX-4581NB | 22-SMD, 20 Leads, Flat Leads | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, SRAM | 16B | HH:MM:SS (24 hr) | YY-MM-DD-dd | SPI | 1.6V ~ 5.5V | - | 0.8µA ~ 1.2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 22-SON | 
                 
                 
                
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                    RX-4801JE:UBIC RTC CLK/CALENDAR SPI 20VSOJ EPSON  |  
                1,028 | - | 
                
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                       Datasheet  | 	
                
                - | 20-LSSOJ (0.213", 5.40mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | 16B | HH:MM:SS (24 hr) | YY-MM-DD-dd | SPI | 1.6V ~ 5.5V | - | 2.1µA ~ 3.4µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-VSOJ | 
                 
                 
                
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                    RTC-7301DG:B ROHSIC RTC CLK/CALENDAR PAR 18DIP EPSON  |  
                3,022 | - | 
                
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                       Datasheet  | 	
                
                - | 18-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 2.4V ~ 5.5V | - | 1µA ~ 2µA @ 3V ~ 5V | -40°C ~ 85°C | Through Hole | - | - | 18-DIP | 
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                    RX-8581JE:B3 I2C-BUSIC RTC CLK/CALENDAR I2C 20VSOJ EPSON  |  
                4,037 | - | 
                
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                       Datasheet  | 	
                
                RX-8581JE | 20-LSSOJ (0.213", 5.40mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.8µA ~ 1.2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-VSOJ | 
                 
                 
                
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                    RTC-72423A0:ROHSIC RTC CLK/CALENDAR PAR 24SOP EPSON  |  
                1,216 | - | 
                
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                       Datasheet  | 	
                
                RTC-72423 | 24-SOIC (0.311", 7.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 5µA ~ 10µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 24-SOP |