I'm a student, and I'm working on a low power communication project, I am trying to design a PCB using the TI CC2540 sample design. There is a MC-306(32.768kHz, 12.5pf, and 20/50ppm) I don't know what is the 20/50ppm. For me very important the size, so I decided to replace with the following FX135A but there the ppm is -20/+20. Will it cause a problem if I us this one?
What is the ppm in the crystal oscillator?