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| Part Number | DS1643-70 | DS1643P-70 | DS1643-70+ | DS1543-70 | DS1642-70 |
|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Type | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar |
| Features | Leap Year, NVSRAM | Leap Year, NVSRAM | Leap Year, NVSRAM | Alarm, Leap Year, NVSRAM, Watchdog Timer | Leap Year, NVSRAM |
| Memory Size | 8KB | 8KB | 8KB | 8KB | 2KB |
| Time Format | HH:MM:SS (24 hr) | HH:MM:SS (24 hr) | HH:MM:SS (24 hr) | HH:MM:SS (24 hr) | HH:MM:SS (24 hr) |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd |
| Interface | Parallel | Parallel | Parallel | Parallel | Parallel |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Voltage - Supply, Battery | - | 3V | - | - | - |
| Current - Timekeeping (Max) | 3mA @ 5V | 3mA @ 5V | 3mA @ 5V | 3mA @ 5V | 3mA @ 5V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Through Hole | Surface Mount | Through Hole | Through Hole | Through Hole |
| Package / Case | 28-DIP Module (0.600", 15.24mm) | 34-PowerCap™ Module | 28-DIP Module (0.600", 15.24mm) | 28-DIP Module (0.600", 15.24mm) | 24-DIP Module (0.600", 15.24mm) |
| Supplier Device Package | 28-EDIP | 34-PowerCap Module | 28-EDIP | 28-EDIP | 24-EDIP |
