Hello, I have a project and I need to choose a RTC . My criterias are Year/month/day...sec / 3v supply / up to 20 min drift accuracy by year is acceptable / I2C communication / Alarm output to awake the µc / Temp -20 to 50°C , and of course the best price !!!! Someone knows an appropriate tool or selector ? or the best way , if you are the "king" of the RTC ... Tell me what ref you will choose for that ..