<div dir="ltr"><div><div><div><div>Hi Volker<br></div>The chip in question was a DS2726 or something virtually identical to it.<br>See: <a href="http://www.maximintegrated.com/datasheet/index.mvp/id/5887">http://www.maximintegrated.com/datasheet/index.mvp/id/5887</a><br>

</div>Unfortunately this device is now obsolete.<br><br></div>Best regards<br></div>  Peter<br></div>