CD4060 Xtl Osc. Circuit
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From: Martin Riddle on 13 Mar 2010 13:53 <krw(a)att.bizzzzzzzzzzzz> wrote in message news:6qmnp598tm30hlmvgvdne65ps3msbb8q3r(a)4ax.com... > On Sat, 13 Mar 2010 09:05:24 -0800, John Larkin > <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: > >>On Sat, 13 Mar 2010 08:42:27 -0800, Fred Abse >><excretatauris(a)invalid.invalid> wrote: >> >>>On Fri, 12 Mar 2010 16:28:07 -0800, John Larkin wrote: >>> >>>> I never buy crystals for things like this. They have a high >>>> probability of >>>> not working, and you wind up fiddling with capacitors and such. >>>> It's >>>> easier to but a packaged, working crystal oscillator, already tuned >>>> to a >>>> couple PPM, guaranteed to oscillate, for $1.50 or thereabouts. >>> >>>Me, too. Amplifiers oscillate, oscillators don't ;-) >> >>We've just started using silicon oscillators, in SOT-23 sized >>packages, for things where 1% is good enough. We're using one part >>that's pin strappable for 8-4-2-1 MHz. > > A seven pin SOT-23? I think its this Linear part <http://cds.linear.com/docs/Datasheet/6900fa.pdf> There are others tho. Cheers
From: krw on 13 Mar 2010 14:15 On Sat, 13 Mar 2010 13:53:23 -0500, "Martin Riddle" <martin_rid(a)verizon.net> wrote: > > ><krw(a)att.bizzzzzzzzzzzz> wrote in message >news:6qmnp598tm30hlmvgvdne65ps3msbb8q3r(a)4ax.com... >> On Sat, 13 Mar 2010 09:05:24 -0800, John Larkin >> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >> >>>On Sat, 13 Mar 2010 08:42:27 -0800, Fred Abse >>><excretatauris(a)invalid.invalid> wrote: >>> >>>>On Fri, 12 Mar 2010 16:28:07 -0800, John Larkin wrote: >>>> >>>>> I never buy crystals for things like this. They have a high >>>>> probability of >>>>> not working, and you wind up fiddling with capacitors and such. >>>>> It's >>>>> easier to but a packaged, working crystal oscillator, already tuned >>>>> to a >>>>> couple PPM, guaranteed to oscillate, for $1.50 or thereabouts. >>>> >>>>Me, too. Amplifiers oscillate, oscillators don't ;-) >>> >>>We've just started using silicon oscillators, in SOT-23 sized >>>packages, for things where 1% is good enough. We're using one part >>>that's pin strappable for 8-4-2-1 MHz. >> >> A seven pin SOT-23? > >I think its this Linear part ><http://cds.linear.com/docs/Datasheet/6900fa.pdf> >There are others tho. Neat (but sloppy - 1/5% to 2% error). That's a trinary input (1/10/100) in a SOT-23-5. John was suggesting 1-2-4-8 binary inputs. I've never seen a SOT-23-7. Up to six pins on a "SOT-23" I can understand, but where does the seventh pin go?
From: John Fields on 13 Mar 2010 14:31 On Sat, 13 Mar 2010 13:15:43 -0600, "krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote: >On Sat, 13 Mar 2010 13:53:23 -0500, "Martin Riddle" <martin_rid(a)verizon.net> >wrote: > >> >> >><krw(a)att.bizzzzzzzzzzzz> wrote in message >>news:6qmnp598tm30hlmvgvdne65ps3msbb8q3r(a)4ax.com... >>> On Sat, 13 Mar 2010 09:05:24 -0800, John Larkin >>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>> >>>>On Sat, 13 Mar 2010 08:42:27 -0800, Fred Abse >>>><excretatauris(a)invalid.invalid> wrote: >>>> >>>>>On Fri, 12 Mar 2010 16:28:07 -0800, John Larkin wrote: >>>>> >>>>>> I never buy crystals for things like this. They have a high >>>>>> probability of >>>>>> not working, and you wind up fiddling with capacitors and such. >>>>>> It's >>>>>> easier to but a packaged, working crystal oscillator, already tuned >>>>>> to a >>>>>> couple PPM, guaranteed to oscillate, for $1.50 or thereabouts. >>>>> >>>>>Me, too. Amplifiers oscillate, oscillators don't ;-) >>>> >>>>We've just started using silicon oscillators, in SOT-23 sized >>>>packages, for things where 1% is good enough. We're using one part >>>>that's pin strappable for 8-4-2-1 MHz. >>> >>> A seven pin SOT-23? >> >>I think its this Linear part >><http://cds.linear.com/docs/Datasheet/6900fa.pdf> >>There are others tho. > >Neat (but sloppy - 1/5% to 2% error). That's a trinary input (1/10/100) in a >SOT-23-5. John was suggesting 1-2-4-8 binary inputs. I've never seen a >SOT-23-7. Up to six pins on a "SOT-23" I can understand, but where does the >seventh pin go? --- It doesn't. I think he was talking two binary inputs to switch between four output frequencies, so that's only 5 pins. JF
From: John Fields on 13 Mar 2010 14:39 On Sat, 13 Mar 2010 13:31:19 -0600, John Fields <jfields(a)austininstruments.com> wrote: >On Sat, 13 Mar 2010 13:15:43 -0600, "krw(a)att.bizzzzzzzzzzzz" ><krw(a)att.bizzzzzzzzzzzz> wrote: > >>On Sat, 13 Mar 2010 13:53:23 -0500, "Martin Riddle" <martin_rid(a)verizon.net> >>wrote: >> >>> >>> >>><krw(a)att.bizzzzzzzzzzzz> wrote in message >>>news:6qmnp598tm30hlmvgvdne65ps3msbb8q3r(a)4ax.com... >>>> On Sat, 13 Mar 2010 09:05:24 -0800, John Larkin >>>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>>> >>>>>On Sat, 13 Mar 2010 08:42:27 -0800, Fred Abse >>>>><excretatauris(a)invalid.invalid> wrote: >>>>> >>>>>>On Fri, 12 Mar 2010 16:28:07 -0800, John Larkin wrote: >>>>>> >>>>>>> I never buy crystals for things like this. They have a high >>>>>>> probability of >>>>>>> not working, and you wind up fiddling with capacitors and such. >>>>>>> It's >>>>>>> easier to but a packaged, working crystal oscillator, already tuned >>>>>>> to a >>>>>>> couple PPM, guaranteed to oscillate, for $1.50 or thereabouts. >>>>>> >>>>>>Me, too. Amplifiers oscillate, oscillators don't ;-) >>>>> >>>>>We've just started using silicon oscillators, in SOT-23 sized >>>>>packages, for things where 1% is good enough. We're using one part >>>>>that's pin strappable for 8-4-2-1 MHz. >>>> >>>> A seven pin SOT-23? >>> >>>I think its this Linear part >>><http://cds.linear.com/docs/Datasheet/6900fa.pdf> >>>There are others tho. >> >>Neat (but sloppy - 1/5% to 2% error). That's a trinary input (1/10/100) in a >>SOT-23-5. John was suggesting 1-2-4-8 binary inputs. I've never seen a >>SOT-23-7. Up to six pins on a "SOT-23" I can understand, but where does the >>seventh pin go? > >--- >It doesn't. > >I think he was talking two binary inputs to switch between four output >frequencies, so that's only 5 pins. --- Or, pin-strappable means four hot pins and you strap to the one(s) that'll give you what (8,or 4,or 2,or 1MHz) you want, for a total of 6 pins. JF
From: krw on 13 Mar 2010 15:02
On Sat, 13 Mar 2010 13:31:19 -0600, John Fields <jfields(a)austininstruments.com> wrote: >On Sat, 13 Mar 2010 13:15:43 -0600, "krw(a)att.bizzzzzzzzzzzz" ><krw(a)att.bizzzzzzzzzzzz> wrote: > >>On Sat, 13 Mar 2010 13:53:23 -0500, "Martin Riddle" <martin_rid(a)verizon.net> >>wrote: >> >>> >>> >>><krw(a)att.bizzzzzzzzzzzz> wrote in message >>>news:6qmnp598tm30hlmvgvdne65ps3msbb8q3r(a)4ax.com... >>>> On Sat, 13 Mar 2010 09:05:24 -0800, John Larkin >>>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>>> >>>>>On Sat, 13 Mar 2010 08:42:27 -0800, Fred Abse >>>>><excretatauris(a)invalid.invalid> wrote: >>>>> >>>>>>On Fri, 12 Mar 2010 16:28:07 -0800, John Larkin wrote: >>>>>> >>>>>>> I never buy crystals for things like this. They have a high >>>>>>> probability of >>>>>>> not working, and you wind up fiddling with capacitors and such. >>>>>>> It's >>>>>>> easier to but a packaged, working crystal oscillator, already tuned >>>>>>> to a >>>>>>> couple PPM, guaranteed to oscillate, for $1.50 or thereabouts. >>>>>> >>>>>>Me, too. Amplifiers oscillate, oscillators don't ;-) >>>>> >>>>>We've just started using silicon oscillators, in SOT-23 sized >>>>>packages, for things where 1% is good enough. We're using one part >>>>>that's pin strappable for 8-4-2-1 MHz. >>>> >>>> A seven pin SOT-23? >>> >>>I think its this Linear part >>><http://cds.linear.com/docs/Datasheet/6900fa.pdf> >>>There are others tho. >> >>Neat (but sloppy - 1/5% to 2% error). That's a trinary input (1/10/100) in a >>SOT-23-5. John was suggesting 1-2-4-8 binary inputs. I've never seen a >>SOT-23-7. Up to six pins on a "SOT-23" I can understand, but where does the >>seventh pin go? > >--- >It doesn't. > >I think he was talking two binary inputs to switch between four output >frequencies, so that's only 5 pins. Ah, that would make sense. When I see 1-2-4-8 I naturally assume a 4-bit binary sequence. With only a binary divider it's even less interesting. |