Maxim Integrated 78M6610+PSU Hardware Design Guidelines - Manual (Page 15)

AN_6610_107 78M6610+PSU Hardware Design Guidelines
Rev. 0 15
5.2 Crystal Oscillator Components
The 78M6610+PSU Evaluation Board has the crystal and its two load capacitors located on the bottom
layer. Place a GND trace between the two terminals of the crystal to minimize oscillator startup problems.
Figure 10: Crystal Y1 and Capacitors C8/ C11
The 78M6610+PSU can operate without an external crystal. Attach the XOUT pin to GND when the
external crystal is not used.
Crystal
GND Via
GND
Isolator
GND Via