超高精度， I²C RTC，集成晶体和SRAM Extremely Accurate I2C RTC with Integrated Crystal and SRAM
General Description
The DS3232 is a low-cost temperature-compensated crystal oscillator TCXO with a very accurate, temperature-compensated, integrated real-time clock RTC and 236 bytes of battery-backed SRAM. Additionally, the DS3232 incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3232 is available in commercial and industrial temperature
ranges, and is offered in an industry-standard 20-pin, 300-mil SO package.
Features
♦Accuracy ±2ppm from 0°C to +40°C
♦Accuracy ±3.5ppm from -40°C to +85°C
♦Battery Backup Input for Continuous Timekeeping
♦Operating Temperature Ranges
Commercial: 0°C to +70°C
Industrial: -40°C to +85°C
♦236 Bytes of Battery-Backed SRAM
♦Low-Power Consumption
♦Real-Time Clock Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Up to 2099
♦Two Time-of-Day Alarms
♦Programmable Square-Wave Output
♦Fast 400kHz I2C Interface
♦3.3V Operation
♦Digital Temp Sensor Output: ±3°C Accuracy
♦Register for Aging Trim
♦RSTInput/Output
♦300-Mil, 20-Pin SO Package
♦Underwriters Laboratories UL® Recognized
Applications
Servers
Utility Power Meters
Telematics
GPS