[time-nuts] Si570 question

Götz Romahn goetz at g-romahn.de
Tue Nov 18 13:24:18 EST 2014

thre is some info at:
it's all in German. If you can read that, goto "Zusaztinformationen" 
(additional informations) where you will find a comprehensive articel 
(pdf-document) also in German language (no I have not played with it).
enjoy Götz

Am 18.11.2014 16:59, :
> I'm sure someone here has fooled with the Si570.
> I just got a few of them (CMOS output), and am about to deadbug one of
> them to fool with it (unless there's some convenient protoboard out
> there available.. I didn't look too long and hard, but some casual
> googling didn't find one).
> Looking at AN334 from SiLabs:
> It looks like you just need a 10nF bypass on the Vcc, a pull down on the
> OE (1k), 1k pullups to 3.3V on SDA/SCL (which is going to be driven by a
> 3.3V teensy 3.0/3.1 microcontroller)
> 150 ohm loads to ground, followed by a 0.1 uF DC block?
> I'm going to be running it at less than 50 MHz (although the parts I got
> are preset to 100 MHz)
> Any traps for the unwary?
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