MAXIM INTEGRATED / ANALOG DEVICES DS1308U-18+ Datasheet & Stock

The DS1308U-18+ is a low current I2C RTC with 56byte NV RAM in 8 pin µSOP package. This serial real-time clock (RTC) is a full binary coded decimal (BCD) clock/calendar plus 56bytes of NV RAM. Address and data are transferred serially through an I2C interface. The clock/calendar provides seconds, minutes, hours, day, date, month and year information. The end of month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24 hour or 12 hour format with an AM/PM indicator. It has a built-in power sense circuit that detects power failures and automatically switches to backup supply, maintaining time and date operation. It is used in office equipment (fax/printer, copier), telecommunications (router, switcher, server) and other (utility meter, vending machine, thermostat, modem).




Supply voltage range is 1.71V to 5.5V

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

Compatible with crystal ESR up to 100Kohm allows crystal to be optimized for cost & space

Low power operation extends battery backup run time, low timekeeping current of 250nA (typ)

Power fail trip point is 1.62V

Completely manages all timekeeping functions

56 byte, battery backed, general-purpose RAM with unlimited writes

Programmable square wave output signal

Simple serial port interfaces with most microcontrollers

UL recognized





Applications


Clock & Timing,

Portable Devices,

Consumer Electronics,

Medical





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