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Analog Devices DS1391U-33+ — Discrete Semiconductors
Analog Devices

Maxim DS1391U-33+ RTC Clock/Calendar, SPI, 10-uMAX

MPNDS1391U-33+
End of Life

Maxim DS1391U-33+, Clock/Calendar RTC, SPI interface, 2.97V–5.5V supply, -40°C to 85°C, 10-uMAX/uSOP package.

$5.03Ref. price · indicative, final on quote
DS1391U-33+ datasheet
Packaging10-TFSOP, 10-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.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

DS1391U-33+ Technical Specifications
ParameterValue
TypeClock/Calendar
Mounting typeSurface Mount
Voltage2.97V ~ 5.5V
Voltage - supply, battery1.3V ~ 5.5V
Current - timekeeping175µA @ 2.97V ~ 5.5V
InterfaceSPI
Operating temperature-40°C ~ 85°C
PackageTube
FeaturesAlarm, Leap Year, Square Wave Output, Trickle-Charger
Date formatYY-MM-DD-dd
Time formatHH:MM:SS:hh (12/24 hr)
Case10-TFSOP, 10-MSOP (0.118\", 3.00mm Width)

Product details

Temperature grade and environment

Rated for -40°C to 85°C operation. The timekeeping current maxes at 175µA across the full supply range.

Lifecycle and sourcing

No end-of-life notice is on record, so the DS1391U-33+ is safe to specify for new designs and production builds.

Frequently asked questions

Is DS1391U-33+ compatible with 3.3V logic?

Yes, the supply range of 2.97V to 5.5V includes 3.3V, so SPI signals are at 3.3V logic levels when powered from a 3.3V rail.