SimCom SIM5320AL User Manual page 33

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input.
SPEAKER circuit in SIM5320 is a Class-D amplifier, optional EMI filter is shown in the following figure;
these components (two ferrite beads and two capacitors) can reduce electromagnetic interference. If used,
they should be located beside SPK_P and SPK_N pins. Considerable current flows in the channels, so
wider PCB traces are recommended (~ 20 mils).
Figure 21: Speaker interface configuration
Figure 22: Receiver interface configuration
SIM5320AL_User Manual_V1.01 33 2014-08-20