EM MICROELECTRONIC - MARIN SA EM3027 Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Power Supply Switchover and Battery Trickle Charger Description The EM3027 is a Real Time Clock IC with an I2C or SPI Serial Interface with voltage/temperature sensing, switch circuitry, trickle charger and low power oscillator. RTC functions include counters for seconds, minutes, hours, days, weekdays, month days, months and years with leap-year compensation. It features also programmable alarm for time events (minutes, hour, days, weekdays and month). 1.3V to 5.5V supply voltage I2C or SPI serial interface Temperature sensor Readable thermometer sensor Battery or super-cap backup with automatic switchover circuitry and trickle charger 16 bit timer One EEPROM Byte and eight RAM Bytes for Application Programmable clock output for peripheral devices (32.768kHz, 1024Hz, 32Hz, 1Hz) Alarm and timers functions open-drain interrupt output Benefits High precision frequency Battery or super-cap backup provides full time keeping security. High flexibility with two standard interfaces: I2C and SPI 32.768kHz clock output (with enable) Applications Key Features Crystal frequency Temperature compensation Very high frequency stability <10 ppm over full voltage and temperature ranges when device is calibrated with crystal -40°C to +125°C operating temperature 600nA typical supply current Block diagram EM3027 Temperature Sensor X1 Oscillator X2 VCC VREG VBAT SCL/SCK SDA/SO SI CS CLKOUT INT/IRQ CLKOE Power Management Two Wire Interface or SPI Output Control Industrial metering and process control Automotive Point of sales terminals Vending machine White goods Medical equipments Typical Application Pin out EM3027 I2C pinout SO8/TSSOP8 Clocks - Seconds - Minutes - Hours - Days - Weekdays - Months - Years EM3027IDXWS8 EM3027IDXSO08B+ EM3027IDSSO08B+ EM3027SDXTP14B+ EM3027SDSTP14B+ SO8 SO8 TSSOP14 TSSOP14 EM3027 GND CD SDA NC X1 X2 CLKOE SI V cc Clock for Application VCC SCL CLKOUT XI XO INT µC CS SCL/SCK SDA/SO SI VBACK CLKOUT VBack CD (Application) Serial data Interface VSS (SPI, I2C) CS SCK INT Vss Functional Temperature -40 +125°C -40 +125°C -40 +85°C -40 +125°C -40 +85°C nIRQ Lithium battery protection resistor (optional) VSS EM3027 EnClk CLKOE 1K Ω Vreg VCC EM3027 Crystal EM3027 SPI pinout TSSOP14 EEPROM Package Vcc IRQ/CLKOUT VBack Alarm - Second - Minute - Hour - Day - Weekday - Month - Year Timer Part Number X1 X2 1.3V to 5.5V VCC Supply SO Interface I2C I2C I2C SPI SPI Battery ( rechargeable or Not ) Tantalum Or Super Cap. VSS Delivery Form = 0V Marking Line 1 Line 3 Sawn 8 mils on Blue foil Tape & Reel, 2500 pcs Tape & Reel, 2500 pcs Tape & Reel, 3500 pcs Tape & Reel, 3500 pcs 3027 3027 3027 3027 X5 S5 X6 S6 * The I2C Bus is a trademark of Philips Electronics N.V Copyright 2013, EM Microelectronic-Marin SA Subject to change without notice 3027-FS.doc, Version 2.0, 25-Jan-13 1 www.emmicroelectronic.com