Analog Devices DS1501WZN+, Clock/Calendar RTC, Parallel Interface, 256B NVSRAM, Alarm, Watchdog Timer, Y2K, 3V-3.6V, -40°C to 85°C, 28-SOIC, Tube.
| Parameter | Value |
|---|---|
| Type | Clock/Calendar |
| Mounting | Surface Mount |
| Voltage | 3V ~ 3.6V |
| Voltage - supply, battery | 2.5V ~ 3.7V |
| Current - timekeeping | 4mA @ 3V ~ 3.6V |
| Interface | Parallel |
| Operating temperature | -40°C ~ 85°C |
| Package | Tube |
| Features | Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K |
| Date format | YY-MM-DD-dd |
| Memory size | 256B |
| Time format | HH:MM:SS (24 hr) |
| Case | 28-SOIC (0.295\", 7.50mm Width) |
It keeps time in HH:MM:SS (24-hour) and YY-MM-DD-dd date formats. The parallel bus makes it a direct drop-in for designs that already use a byte-wide RTC interface — no SPI or I²C translation needed.
No derating needed for the RTC function across that span.
ROHS3 compliant.
Yes, the DS1501WZN+ includes a watchdog timer as one of its integrated features, along with alarm, leap year compensation, NVSRAM, square wave output, and Y2K tracking.
Yes, it has a dedicated battery backup supply input (2.5V to 3.7V) that maintains timekeeping and NVSRAM contents when the main supply drops.