The DS1307Z Datasheet says +5V for Vcc and max. +3B for Vbatt. It runs without
Vbatt, but not without Vcc.
You are right, The DS1629 uses the same protokol (2-wire bus).
Thanks

Jerry Iacobucci schrieb:

> Is that the real time clock.
>
> I think I fried my DS1307 when I put 5 volts to the battery input instead of
> battery voltage approx. 3 volts.  It would not oscillate the clock after
> that.
>
> I got a DS1629 part which has temperature and clock, and got that to work
> with CCS C compiler.  I think the same code would work.  Dallas combined the
> DS1307 clock and the DS1621 chips into one DS1629.  Only problem I had was
> that it only comes as an SMD part.