LISA-U2 series - System integration manual
UBX-13001118 - R27
Design-In
Page 143 of 183
C1-Public
ESD category level, all the module pins that are externally accessible should be protected up to
±
4 kV
for direct Contact Discharge and up to
±
8 kV for Air Discharge applied to the enclosure surface.
The maximum ESD sensitivity rating of all the other pins of the module is 1 kV (Human Body Model
according to JESD22-A114F). Higher protection levels could be required if the relevant pin is
externally accessible on the application board. The following precautions are suggested to achieve
higher protection levels:
•
USB interface
: a very low capacitance (i.e. less or equal to 1 pF) ESD protection device (e.g. Tyco
Electronics PESD0402-140 ESD protection device) should be mounted on the
USB_D+
and
USB_D-
lines, close to the accessible points (i.e. close to the USB connector)
•
SPI interface
: a low capacitance (i.e. less than 10 pF) ESD protection device (e.g. Infineon
ESD8V0L2B-03L or AVX USB0002) should be mounted on the
SPI_MISO
,
SPI_MOSI
,
SPI_SCLK
,
SPI_MRDY
,
SPI_SRDY
lines, close to the accessible points
•
CODEC_CLK
: a low capacitance (i.e. less than 10 pF) ESD protection device (e.g. Infineon
ESD8V0L2B-03L or AVX USB0001) should be mounted on the
CODEC_CLK
line, close to the
accessible point
•
Other pins
: a general purpose ESD protection device (e.g. EPCOS CA05P4S14THSG varistor array
or EPCOS CT0402S14AHSG varistor) should be mounted on the related line, close to the
accessible point