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Analog Devices DS1501WZN+ — Analog & Data Acquisition
Analog Devices

DS1501WZN+ RTC Clock/Calendar, Parallel, 256B NVSRAM

MPNDS1501WZN+
End of Life

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.

$14.57Ref. price · indicative, final on quote
DS1501WZN+ datasheet
Packaging28-SOIC (0.295", 7.50mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

DS1501WZN+ Technical Specifications
ParameterValue
TypeClock/Calendar
Mounting typeSurface Mount
Voltage3V ~ 3.6V
Voltage - supply, battery2.5V ~ 3.7V
Current - timekeeping4mA @ 3V ~ 3.6V
InterfaceParallel
Operating temperature-40°C ~ 85°C
PackageTube
FeaturesAlarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K
Date formatYY-MM-DD-dd
Memory size256B
Time formatHH:MM:SS (24 hr)
Case28-SOIC (0.295\", 7.50mm Width)

Product details

RTC with integrated NVSRAM and watchdog — what this part packs

The DS1501WZN+ from Analog Devices is a parallel-interface real-time clock (RTC) that also integrates 256 bytes of NVSRAM, a watchdog timer, an alarm, a square wave output, and Y2K/leap-year tracking. 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.

Supply and temperature — what the ratings mean for the BOM

Industrial temperature grade (-40°C to 85°C) covers outdoor telecom cabinets, factory-floor controllers, and automotive cabin-adjacent modules. No derating needed for the RTC function across that span.

Lifecycle and sourcing

ROHS3 compliant.

Frequently asked questions

Does DS1501WZN+ have a watchdog timer?

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.

Does DS1501WZN+ support battery backup?

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.