Thankyou Attila. I remember reading a book on PLL theory, recently,writen by a very knowledgable fellow, but I didn`t think to make a copy of his critique of the 4046. I recall that the nub of it was that the 4046 isn`t suitable for some applications because of a design flaw. Perhaps somebody in this group could explain further. Thankyou Bill, for the datasheet on the 74HCT9046, and your comments Cheers!..............................................................................Don jnr ZL4GX
<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Wed, Apr 18, 2018 at 8:28 PM, wb6bnq <[email protected]> wrote: > Hi Donald, > > You could consider the NXP 74HCT9046A as a replacement. It is an improved > version of 4046. However, you do need to study the spec sheet as it is a > bit different, but in a good way. > > I have included an attached PDF of the spec sheet, if it makes through the > mail list server. > > Bill....WB6BNQ > > > donald collie wrote: > > I have 4 frequency synthesiser projects, each using HEF4046BCN`s, but have >> recently read that this CMOS IC has a design flaw. What would be a better >> chip to retrofit? I`m thinking perhaps a HEF74HC4046AN [that`s if it >> doesn`t have the same bug], or a 74HC7046AN - which is similar. Both these >> chips are more-or-less pin compatable TIA for any >> advice!..................................................... >> ..................................................Don >> >> <http://www.avg.com/email-signature?utm_medium=email&utm_ >> source=link&utm_campaign=sig-email&utm_content=webmail> >> Virus-free. >> www.avg.com >> <http://www.avg.com/email-signature?utm_medium=email&utm_ >> source=link&utm_campaign=sig-email&utm_content=webmail> >> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/m >> ailman/listinfo/time-nuts >> and follow the instructions there. >> >> >> > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
