Help identifying IC

[Ethan Dicks]

On Sat, Jan 20, 2018 at 9:06 PM, Josh Dersch via cctalk
<cctalk at classiccmp.org> wrote:
> Hi all --
>
> I picked up this little toy at VCF West last summer:
>
> https://1drv.ms/i/s!Aqb36sqnCIfMouYd0HV0ZThE3FnE_Q

Cute!

> As far as I can tell, it's supposed to be a clock

Sure looks like one.

> Can't find anything about this item at all.  At the moment I'm curious what
> the 28-pin IC at the top is

There are a number of 28-pin clock ICs from the era...

MK50250
  http://www.waynekirkwood.com/images/pdf/MK50250_Clock.pdf

MM5313 / MM5315
  http://www.sphere.bc.ca/test/nixies/mm5309-5311-5312-5313-5314-5315.pdf

I'm sure there are more.

-ethan