Hi,
I can recommend Ricoh R5C313. It is very small (8-pin SMT), cheap ($1.5 at
us), simple to use and can run from a backup Lithium cell, too.
Regards
Imre


On Thu, 18 Nov 1999, Nikolai Golovchenko wrote:

> -----Original Message-----
> From: erik <erik@NETWURX.NET>
> To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
> Date: Thursday, November 18, 1999 4:41 AM
> Subject: RTC recommendations
>
>
> >Could someone recommend for me a Real Time Clock for my PIC project?
> >Preferably with :
> >Calander
> >Serial Interface ( low pin count interface )
> >internal battery
> >
> >Thank you,
> >Erik
>
>
> I would recommend Philips PCF8583. It has I2C interface, draws 10 to 50 uA,
> external battery though, and cheap (can be bought here for $3.1). Dallas
> makes RTC with internal battery, but twice or three times the cost. RTC
> using Timer1 in PIC with additional 32768 Hz quartz may be probably the best
> solution, isn't it?
>
> _
>
> Nikolai Golovchenko, Electrical Engineering Student
> National Mining University of Ukraine www.nmuu.dp.ua
> Dnepropetrovsk, Ukraine
> E-mail: golovchenko@mail.ru
>
>