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Analog Devices DS1673E-3+ — Analog & Data Acquisition

Analog Devices DS1673E-3+ RTC, Portable System Controller

MPNDS1673E-3+
End of Life

Analog Devices DS1673E-3+ Portable System Controller, Real-Time Clock, 20-TSSOP, Tube, 2.7V-3.3V, 3-Wire Serial, Alarm, Watchdog Timer.

$11.11Ref. price · indicative, final on quote
Packaging20-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DS1673E-3+ specifications
ParameterValue
TypePortable System Controller
MountingSurface Mount
Voltage2.7V ~ 3.3V
Voltage - supply, battery2.5V ~ 3.7V
Current - timekeeping100µA @ 3V
Interface3-Wire Serial
Operating temperature0°C ~ 70°C
PackageTube
FeaturesAlarm, Leap Year, Watchdog Timer
Date formatYY-MM-DD-dd
Time formatHH:MM:SS (12/24 hr)
Case20-TSSOP (0.173\", 4.40mm Width)

Product details

Portable system controller with integrated RTC

The DS1673E-3+ is a portable system controller from Analog Devices that integrates a real-time clock (RTC) with alarm, leap-year compensation, and a watchdog timer. It communicates over a 3-wire serial interface and tracks time in HH:MM:SS (12/24 hr) and date in YY-MM-DD-dd format.

Supply range and timekeeping current

Operates from a 2.7V to 3.3V main supply, with a separate battery backup input from 2.5V to 3.7V. Timekeeping current draw is 100µA maximum at 3V, which sets the battery-life budget for portable designs where the RTC must keep time while the main rail is off.

20-TSSOP package and board integration

Housed in a 20-TSSOP (4.40mm width) surface-mount package, the DS1673E-3+ occupies a compact footprint for space-constrained portable-system PCBs. The supplier device package is the same 20-TSSOP, so the land pattern matches the standard JEDEC MO-153 outline for this body width.

Frequently asked questions

What is the DS1673E-3+ used for?

The DS1673E-3+ is a portable system controller with an integrated real-time clock, alarm, leap-year compensation, and watchdog timer. It is used in battery-powered or portable equipment that needs to track time and date over a 3-wire serial interface while consuming minimal current (100µA max at 3V) during timekeeping.