The best replacement for ds1307 is ds1302.

The best alternatives to ds1307 are rated as following:
★★★★★  ds1302
★★★★★  ds3231
★★★★  ds3234
★★★  ds1337
★★  pcf8583
★★  pcf8563
★  ds1338

Your alternative for ds1307 is not listed? Suggest!
Speaking about ds1307, one probably shouldn't forget about avr.

Other search terms related to ds1307 and their ratings are:
★★★★★ avr
★★★★ atmega16
★★★ atmega32
★★★ pic16f877a
You have in mind a companion for ds1307 and it is not yet here? Propose!



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