DS1306

DS1306 Description  
The Maxim Integrated DS1306 is a high timing accuracy, low power real-time clock that is accessible through a simple serial interface.
The real-time clock DS1306 provides minute, second, hour, day, month, and year information and functions as an alarm, calendar, and clock.
The device is fully operational over a supply voltage range of 2V to 5.5V.   DS1306
Features  
• Completely Manages All Timekeeping Functions  o Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year  Compensation Valid Up to 2100  o 96-Byte, Battery-Backed NV RAM for Data Storage  o Two Time-Of-Day Alarms, Programmable on Combination of Seconds, Minutes, Hours, and Day of the Week  o 1Hz and 32.768kHz Clock Outputs
• Standard Serial Port Interfaces with Most Microcontrollers  o Supports Motorola SPI (Serial Peripheral Interface) Modes 1 and 3 or Standard 3-Wire Interface  o Burst Mode for Reading/Writing Successive Addresses in Clock/RAM
• Multiple Power Supply Pins Ease Adding Battery for Backup  o Dual-Power Supply Pins for Primary and Backup Power Supplies  o Optional Trickle Charge Output to Backup Supply  o 2.0V to 5.5V Operation
• Optional Industrial Temperature Range: -40°C to +85°C Supports Operation in a  Wide Range of Applications
• 20-Pin TSSOP Minimizes Required Space
• Underwriters Laboratory (UL®) Recognized   DS1306 Applications  
• Consumer Electronics
• Industrial
• Personal computers