Features: · RTC Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
· Available in a Surface-Mount Package with an Integrated Crystal (DS1338C)
· 56-Byte Battery-Backed NV RAM for Data Storage
· I2C Serial Interface
· Programmable Square-Wave Output Signal
· Automatic Power-Fail Detect and Switch Circuitry
· Underwriters Laboratory (UL) Recognized
Application· Handhelds (GPS, POS Terminal)
· Consumer Electronics (Set-Top Box, Digital
· Recording, Network Appliance)
· Office Equipment (Fax/Printer, Copier)
· Medical (Glucometer, Medicine Dispenser)
· Telecommunications (Router, Switcher, Server)
· Other (Utility Meter, Vending Machine, Thermostat, Modem)
SpecificationsVoltage Range on Any Pin Relative to Ground.....................-0.3V to +6.0V
Operating Temperature Range..............................40 to +85
Storage Temperature Range..............................-55 to +125
Soldering Temperature..........See precautions in the Handling, PC Board Layout, and Assembly Section
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those ndicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe DS1338 serial real-time clock (RTC) is a lowpower, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. 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 the 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 AM/PM indicator. The DS1338 has a built-in powersense circuit that detects power failures and automatically switches to the battery supply.
DS1338 Data Sheet
