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Analog Devices DS1344D-33+T&R — Microcontrollers & Processors (MCU / MPU / DSP)
Analog Devices

DS1344D-33+T&R SPI RTC, 96B NVRAM, 14-TDFN

MPNDS1344D-33+T&R
End of Life

Analog Devices DS1344D-33+T&R SPI Clock/Calendar RTC, 96B NVRAM, Alarm, Trickle Charger, 14-TDFN (3x3) Exposed Pad, Tape & Reel.

$6.02Ref. price · indicative, final on quote
Packaging14-WFDFN Exposed Pad
StockContact for availability
Lead timeIn Stock wk
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

DS1344D-33+T&R Technical Specifications
ParameterValue
TypeClock/Calendar
Mounting typeSurface Mount
Voltage3V ~ 5.5V
Voltage - supply, battery1.3V ~ 5.5V
Current - timekeeping120µA ~ 160µA @ 3.63V ~ 5.5V
InterfaceSPI
Operating temperature-40°C ~ 85°C
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesAlarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger
Date formatYY-MM-DD-dd
Memory size96B
Time formatHH:MM:SS (12/24 hr)
Case14-WFDFN Exposed Pad

Product details

SPI RTC with integrated NVRAM and trickle charger

The DS1344D-33+T&R is an SPI real-time clock from Analog Devices that maintains seconds, minutes, hours, day, date, month, and year with automatic leap-year compensation through 2099. The time format is selectable 12-hour or 24-hour, and the date format is YY-MM-DD-dd. It includes 96 bytes of NVRAM for storing alarm thresholds or system status, a programmable square-wave output, and a trickle-charge circuit for charging a backup super-cap or battery from the main supply. The device operates from a main supply of 3.0 V to 5.5 V and a separate battery-backup supply from 1.3 V to 5.5 V, allowing the RTC to keep time when the main rail is off. Maximum timekeeping current is 120 µA to 160 µA at 3.63 V to 5.5 V, which sets the battery-life budget for a backup cell.

The device is supplied on tape and reel (and cut tape) for automated assembly.

Frequently asked questions

What is the closest pin-compatible alternative to DS1344D-33+T&R?

The DS1344 family shares the same SPI interface and 14-TDFN package, but pin compatibility should be verified against the specific variant datasheet.

What is the timekeeping current draw of DS1344D-33+T&R?

Maximum timekeeping current is 120 µA to 160 µA when the main supply is 3.63 V to 5.5 V. This figure determines the battery-life budget for a backup coin cell or super-cap.