[time-nuts] Ublox 8T - breakout board

[Matthias Welwarsky]

On Samstag, 12. Dezember 2020 14:40:11 CET Bob kb8tq wrote:
> Hi
> 
> If you are going to drive much with the timepulse output, you will need to
> buffer it. This is true for just about any practical length of coax. It also
> applies to other cables once they get past the “few inches” range.
> 
> Ideally the coax buffer would be something like 4 or so ‘125 buffers in
> parallel, each with a 200 ohm resistor in series with their output. Is it
> going to put out 3.3V or 5V logic? ….

A HCT125 should have 3.3V logic compatible inputs and TTL outputs. There are 
nice dual-instance buffers available, 74AHCT2G125 for example. But this is not 
"breakout board" material any more.