Cgs synth

From: "megons" <megons@...>
To: <cgs_synth@yahoogroups.com>
Sent: Wednesday, April 25, 2007 9:08 PM
Subject: [cgs_synth] observations about bad/overheating 4017's


>I ordered a Burst Generator and Sub-Oscillator from Elby and they
> shipped with Fairchild 4017's. Neither of them worked so I bought a
> couple of Philips 74HC4017N's and some ST 4017's.
>
> The ST's worked fine, however the Philips overheat in both circuits.
>
> So avoid Fairchild and Philips 4017's!
>
> This might be related to the exploding TI 4017's mentioned in message
> #1968.
>
> Could it be that 15v is too much for the Philips and TI's?
>
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
>
>
>

>
> The Phillips chips are for 5V (74HCxxxx) use only so they wouldn't have
> worked here. Surprised the Fairchild chips didn't work. I will see

> get some time to check it out at my end.,
>
> Best Regards
>
> (Mr) Laurie Biddulph
> Phone: +61 (0)2 4340 0938
> Mobile: 0400 257 645
>
> Elby Designs
> ABN: 70 022 727 605
> http://www.elby-designs.com
>
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> ----- Original Message -----
> From: "megons" <megons@...>
> To: <cgs_synth@yahoogroups.com>
> Sent: Wednesday, April 25, 2007 9:08 PM
> Subject: [cgs_synth] observations about bad/overheating 4017's
>
>
> >I ordered a Burst Generator and Sub-Oscillator from Elby and they
> > shipped with Fairchild 4017's. Neither of them worked so I bought a
> > couple of Philips 74HC4017N's and some ST 4017's.
> >
> > The ST's worked fine, however the Philips overheat in both circuits.
> >
> > So avoid Fairchild and Philips 4017's!
> >
> > This might be related to the exploding TI 4017's mentioned in message
> > #1968.
> >
> > Could it be that 15v is too much for the Philips and TI's?
> >
> >
> >
> >
> > The CGS Modular Synth home page: http://www.cgs.synth.net/
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>

--- In cgs_synth@yahoogroups.com, Mark <yahoogroups@...> wrote:
>
> On 4/25/07, megons put forth:
> >re. +5v for the Philips - I had a feeling, although I couldn't find
> >any specs about that :)
>
> There are different families of logic chips. Within those families,
> the specs are largely the same for every chip. So you can determine
> the specs of a particular chip by looking up its prefix.
>