User's Manual

Smart Machine Smart Decision

SIM7100A_User Manual_V1.01 2014-12-11

3.5.2 USIM Application Guide

It is recommended to use an ESD protection component such as ST (www.st.com ) ESDA6V1W5 or ON

SEMI (www.onsemi.com ) SMF05C. Note that the SIM peripheral circuit should be close to the SIM card

socket. The reference circuit of the 6-pin SIM card holder is illustrated in the following figure.

Figure 19: USIM interface reference circuit

Note: USIM_DATA has been pulled up with a 15kohm resistor to USIM_VDD in module. A 220nF shut

capacitor on USIM_VDD is used to reduce interference. Use AT Commands to get information in USIM

card. For more detail, please refer to document [1].

3.5.3 Recommend Components of USIM holder

For 6 pins USIM socket, SIMCom recommend to use Amphenol C707 10M006 512. User can visit

http://www.amphenol.com for more information about the holder.