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| PartNumber | RTC-62421A | RTC-62423 | RTC-62423(A) |
| Description | IC RTC CLK/CALENDAR PAR 18-DIP | REAL TIME CLOCK, 0 TIMER(S), CMOS, PDSO24 | |
| Manufacturer | EPSON | EPSON | - |
| Product Category | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks | - |
| Series | - | - | - |
| Type | Clock/Calendar | Clock/Calendar | - |
| Packaging | Tube | Digi-ReelR | - |
| Package Case | 18-DIP (0.300", 7.62mm) | 24-SOIC (0.311", 7.90mm Width) | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | - |
| Mounting Type | Through Hole | Surface Mount | - |
| Features | Leap Year | Leap Year | - |
| Interface | Parallel | Parallel | - |
| Voltage Supply | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V | - |
| Supplier Device Package | 18-DIP | 24-SOP | - |
| Memory Size | - | - | - |
| Time Format | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | - |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd | - |
| Voltage Supply Battery | - | - | - |
| Current Timekeeping Max | 1.8μA ~ 3μA @ 2V ~ 5V | 1.8μA ~ 3μA @ 2V ~ 5V | - |