DS1307
Description
The DS1307 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, bidirectional bus.
Key Features
- Completely Manages All Timekeeping Functions o Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100 o 56-Byte, Battery-Backed, General-Purpose RAM with Unlimited Writes o Programmable Square-Wave Output Signal
- Simple Serial Port Interfaces to Most Microcontrollers o I2C Serial Interface
- Low Power Operation Extends Battery Backup Run Time o Consumes Less than 500nA in BatteryBackup Mode with Oscillator Running o Automatic Power-Fail Detect and Switch Circuitry
- 8-Pin DIP and 8-Pin SO Minimizes Required Space CPU RPU = tr/Cb X1 X2 VCC SCL SQW/OUT DS1307 SDA GND VBAT
