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AC75 Hardware Interface Description
Strictly confidential / Preliminary
3.9.1 Installation Advice
The total cable length between the board-to-board connector pins on AC75 and the pins of
the external SIM card holder must not exceed 100mm in order to meet the specifications of
3GPP TS 51.010-1 and to satisfy the requirements of EMC compliance.
To avoid possible cross-talk from the CCCLK signal to the CCIO signal be careful that both
lines are not placed closely next to each other. A useful approach is using the CCGND line to
shield the CCIO line from the CCCLK line.
To meet EMC requirements it is strongly recommended to add several capacitors as shown
in Figure 46. Take care to place the capacitors close to the SIM card holder.
AC75_HD_V00.202
Page 52 of 120
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27.04.2006
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