Skip to main content
Log in
Analog Devices DS1337+ — Discrete Semiconductors

DS1337+ RTC Clock/Calendar I²C 8-DIP, 1.8V-5.5V

MPNDS1337+
End of Life

Maxim Integrated DS1337+ serial real-time clock, I²C 2-wire interface, 8-DIP through-hole package, 1.8V to 5.5V supply, -40°C to 85°C operating temperature.

$4.2Ref. price · indicative, final on quote
Packaging8-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DS1337+ specifications
ParameterValue
TypeClock/Calendar
MountingThrough Hole
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-DIP (0.300\", 7.62mm)

Product details

RTC with I²C bus — what the ratings mean for the BOM

The Maxim Integrated DS1337+ is a serial real-time clock (RTC) providing clock/calendar functionality with an I²C (2-wire serial) interface. It tracks time in HH:MM:SS (12/24 hr) and date in YY-MM-DD-dd format, with integrated alarm, leap-year compensation, and a programmable square-wave output. The part is supplied in an 8-DIP through-hole package (0.300" body width, 7.62 mm pitch) and operates from a single 1.8 V to 5.5 V supply.

Timekeeping current — battery-life anchor

The DS1337+ draws a maximum timekeeping current of 0.6 µA at 1.3 V to 1.8 V on the backup supply. That figure drives the coin-cell lifetime calculation.

ROHS3 compliant. No last-time-buy notice or end-of-life timeline is published.

Frequently asked questions

Can DS1337+ replace DS1307 directly?

The DS1337+ is pin-compatible with the DS1307 in the 8-DIP package and uses the same I²C interface, so a direct socket replacement is possible. However, verify the register map and alarm features — the DS1337+ adds a square-wave output and leap-year compensation that the DS1307 lacks.

Is DS1337+ compatible with 3.3V logic?

Yes. The 1.8 V to 5.5 V supply range means the DS1337+ operates directly at 3.3 V, and its I²C interface is compatible with 3.3 V logic levels without additional components.