Just a quick update: I suppose the module could be a clone of this: https://www.mas-oy.com/wp-content/uploads/2016/05/DAEV6180B1COB.pdf
73's, John AJ6BC On Tue, Sep 22, 2020 at 2:34 AM John C. Westmoreland, P.E. < [email protected]> wrote: > Thanks for the response Bill. > > I think the IC used is more than likely from C-MAX - a datasheet that > could be close to what's on that PCBA is: > > https://upverter.com/datasheet/b2bfa7dae24a50cf9e867ab08e669047ebc91046.pdf > > But, would be nice to know for sure. C-MAX does (or did) provide IC's in > die form - could explain the epoxy ball on the PCBA. > > The MAS boards are here also: > > https://www.amazon.com/CANADUINO-Atomic-Clock-Receiver-60kHz/dp/B01KH3VEGS > > https://www.universal-solder.ca/product/canaduino-60khz-atomic-clock-receiver-module-wwvb-msf-jjy60/ > > 73's, > John > AJ6BC > > > On Mon, Sep 21, 2020 at 8:11 PM Bill Byrom <[email protected]> wrote: > >> I don't have one of those modules. But I believe that most or all such >> low cost WWVB modules sold on Amazon (and similar distribution sources) use >> an IC from a Finnish company (Micro Analog Systems). They have produced >> several different chips over the past 16 years for use in clocks which are >> synchronized from WWWB and other VLF time signals. They all appear to >> decode the AM amplitude only (ASK ,but no BPSK demodulation). So they don't >> provide any frequency or phase information from the signal, and are only >> meant to provide a demodulated digital stream to a controller which drives >> a display for date and time display to 1 second resolution. >> >> The older modules seem to use the MAS10106B AM receiver IC , which has a >> single-ended antenna input. The datasheets I can find are dated January, >> 2004, and this IC seems to be discontinued. >> >> The later modules seem to use the MAS6180C AM receiver IC, which has a >> differential antenna input and so better noise rejection (which can be a >> big problem for time code receivers). The datasheets I can find are dated >> September 2014. >> >> These are tuned RF receivers and are used with a resonant ferrite antenna >> and crystal which is resonant at the operating frequency. These IC's work >> with DCF77 (77.5 kHz), HGB (75 kHz), MSF (60 kHz), WWVB (60 kHz), JJY (40 >> and 60 kHz), or BPC (68.5 kHz) crystals. The crystals are ground to a 3 Hz >> higher frequency (except 5 Hz higher for 68.5 kHz). Stray capacitance below >> 1 pF can affect the crystal resonant frequency. See: >> https://www.mas-oy.com/portfolio/mas6180c/ >> https://www.datasheetq.com/datasheet-download/477051/1/MAS-Oy/MAS1016BTB1 >> -- >> Bill Byrom N5BB >> >> >> >> On Mon, Sep 21, 2020, at 7:25 PM, John C. Westmoreland, P.E. wrote: >> > Hello Time Nuts, >> > >> > Does anyone know which IC is used in the following: >> > (Note: Links have been sanitized by the list moderator.) >> > >> > WWVB Receiver on Amazon >> > < >> https://www.amazon.com/Alano-Controlled-Modules-Receiver-Operating/dp/B07RYK5KN6 >> > >> > >> > It also comes with a clock module: >> > >> > With Clock Module >> > < >> https://www.amazon.com/ALANO-Controlled-Receiver-Modules-Operating/dp/B07YD2XCFL >> > >> > >> > Thanks In Advance! >> > >> > 73's, >> > John >> > AJ6BC >> > _______________________________________________ >> > time-nuts mailing list -- [email protected] >> > To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> > and follow the instructions there. >> > >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. >> > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
