Crystal Oscillator

Figure 1. Crystal Oscillator Example Schematic

The crystal should be located as close to the device as possible. Long signal lines may cause too high load to operate the crystal, and cause crosstalk to other parts of the system.

Table 1. Crystal Oscillator Checklist
Signal Name Recommended Pin Connection Description
XIN Load capacitor 15pF(1)(2) External crystal between 0.4 to 30MHz
XOUT Load capacitor 15pF(1)(2)
  1. These values are given only as typical example.
  2. Decoupling capacitor should be placed close to the device for each supply pin pair in the signal group.
Parent topic: Clocks and Crystal Oscillators