BB_Dialog provided me with two references of 2016 size crystal that should work with the DA14580:
[quote]River Eletec: ESR 80 Ohm max - Type: FCX-06 LF 16.000 MHz
EPSON: ESR 80 Ohm max - Type: FA-128 (new!). Not sure it's released yet.
I've contacted both vendors, and the first one only exists with a 7pF or less load capacitance, 100 ohm ESR
The second one has the right capacitance, but a 200 ohm ESR.
Can you please confirm they will work even if they are out of specs, or provide me with the exact PN of the parts that are known to work?