DS3232S

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