VDD
SCL
SDA
X2
X1
PFI
VBAK
Layout for Surface Mount Crystal
(red = top layer, green = bottom layer)
FM31278/276/274/272 - 5V I2C Companion
VDD
SCL
SDA
X2
X1
PFI
VBAK
Layout for Through Hole Crystal
(red = top layer, green = bottom layer)
Rev. 2.1
Sept. 2011
Page 9 of 26