| Part Number | DS1556WP-120 | DS1557WP-120 |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Category | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks |
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| Product Status | Obsolete | Obsolete |
| Type | Clock/Calendar | Clock/Calendar |
| Features | Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K | Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K |
| Memory Size | 128KB | 512KB |
| Time Format | HH:MM:SS (24 hr) | HH:MM:SS (24 hr) |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd |
| Interface | Parallel | Parallel |
| Voltage - Supply | 2.97V ~ 3.63V | 2.97V ~ 3.63V |
| Voltage - Supply, Battery | 3V | 3V |
| Current - Timekeeping (Max) | 4mA @ 3.3V | 4mA @ 3.3V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 34-PowerCap™ Module | 34-PowerCap™ Module |
| Supplier Device Package | 34-PowerCap Module | 34-PowerCap Module |