DS1308
Description
The DS1308 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV RAM. Address and data are transferred serially through an I2C interface.
Key Features
- Compatible with Crystal ESR Up to 100kΩ Allows a Crystal to be Optimized for Cost and Space *
- Low-Power Operation Extends Battery Backup Run Time
- Low Timekeeping Current of 250nA (typ)
- Automatic Power-Fail Detect and Switch Circuitry *
- Completely Manages All Timekeeping Functions
- 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 2400
- External Clock Source for Synchronization Clock Reference (e.g., 32kHz, 50Hz/60Hz Powerline, GPS 1PPS)
- 56-Byte, Battery-Backed, General-Purpose RAM with Unlimited Writes
- Programmable Square-Wave Output Signal *
- Simple Serial Port Interfaces with Most Microcontrollers
