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Analog Devices DS1337U+ — Discrete Semiconductors
Analog Devices

Maxim DS1337U+ RTC Clock/Calendar, I²C, 8-uMAX

MPNDS1337U+
End of Life

Maxim DS1337U+ Clock/Calendar RTC, I²C 2-Wire Serial interface, 1.8V~5.5V supply, 0.6µA timekeeping current, -40°C~85°C, 8-uMAX/uSOP package, Tube.

$4.01Ref. price · indicative, final on quote
DS1337U+ datasheet
Packaging8-TSSOP, 8-MSOP (0.118", 3.00mm 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.
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Specifications

DS1337U+ Technical Specifications
ParameterValue
TypeClock/Calendar
Mounting typeSurface Mount
Voltage1.8V ~ 5.5V
Current - timekeeping0.6µA @ 1.3V ~ 1.8V
InterfaceI²C, 2-Wire Serial
Operating temperature-40°C ~ 85°C
PackageTube
FeaturesAlarm, Leap Year, Square Wave Output
Date formatYY-MM-DD-dd
Time formatHH:MM:SS (12/24 hr)
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width)

Product details

The Maxim DS1337U+ is a serial real-time clock (RTC) providing a full clock/calendar function — seconds, minutes, hours, day, date, month, and year with leap-year compensation. It communicates over an I²C (2-wire serial) interface. The part includes an alarm output and a programmable square-wave output.

Lifecycle and compliance

ROHS3 compliant, so it passes the current EU restriction list without exemptions. For a BOM freeze, this part is stable; no LTB risk in the near term. If you are stocking for a five-year service contract, the active status and wide supply range make it a safe line item.

Frequently asked questions

Is DS1337U+ a direct replacement for DS1337U?

The DS1337U+ is the lead-free (RoHS-compliant) version of the DS1337U. It is pin-compatible and functionally identical; the '+' suffix indicates ROHS3 compliance. Check your board's reflow profile for lead-free solder compatibility.

Does DS1337U+ require an external crystal?

No external crystal is listed in the specifications. The DS1337U+ integrates the oscillator, so no 32.768 kHz crystal or load capacitors are needed on the BOM.