SIM5300E_Hardware_Design_V1.02
SIM5300E supports both 1.8V and 3.0V USIM cards. The USIM interface is powered from an internal
regulator in the module.
Table 11: USIM Electronic characteristic in 1.8V mode (USIM_VDD=1.8V)
High-level output voltage
Table 12: USM Electronic characteristic 3.0V mode (USIM_VDD=2.9V)
High-level output voltage
It is recommended to use an ESD protection component such as ST (www.st.com ) ESDA6V1W5 or ON SEMI
(www.onsemi.com ) SMF05C.The pull up resistor (4.7KΩ) on the USIM_DATA line is already added in the
module internally. Note that the USIM peripheral circuit should be closed to the USIM card socket. The
reference circuit of the 8-pin USIM card holder is illustrated in the following figure.