MAXIM INTEGRATED / ANALOG DEVICES DS1339BU+ Datasheet & Stock

The DS1339BU+ is a low-current, I2C, serial real time clock for high ESR crystals in 8 pin µSOP package. The serial real time clock (RTC) is a low power clock/date device with two programmable time of day alarms and a programmable square wave output. Address and data are transferred serially through an I2C bus. The clock/date provides seconds, minutes, hours, day, date, month and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days including corrections for leap year. The clock operates in either the 24hour or 12hour format with AM/PM indicator. The device has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply, maintaining time, date and alarm operation.




Supply voltage range is 1.71V to 5.5V

Operating temperature range from -40°C to 85°C

Drop-in replacement for DS1339

Supports high ESR crystals up to 100Kohm to allow crystals to be optimized for cost and space

Leap year compensation valid up to 2200

Low power operation extends battery backup run time

Simple serial port interfaces to the microcontrollers

UL recognized

Backup supply voltage range from 1.3V to 3.7V





Applications


Clock & Timing,

Portable Devices,

Consumer Electronics,

Communications & Networking,

Medical





Warnings
Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.