Multichannel switching of SIM card interface signals and multiplex circuit

The utility model discloses a multichannel switching of SIM card interface signals and multiplex circuit, it includes control chip U40, control chip U41, control chip U42, three control chip's the quick -witted application processing ware of 2 feet catcher, control chip U40's 4 feet meet the reset pin RST of a SIM card, and control chip U41's 4 feet meet a SIM card clock pin CLK, and control chipU42's 4 feet meet the 2nd SIM card clock pin CLK, control chip U40's 4 feet have met resistance R40, and control chip U41's 4 feet have met resistance R56, and control chip U42's 4 feet have met resistance R55, resistance R53 has been met between control chip U40's 5 feet and 2 feet, need many cards to switch during the wireless product application of some trade, be greater than 10 even, the utility model discloses can do the crucial signal of SIM circuit and switch and be multiplexing. 本实用新型公开了SIM卡接口信号多路的切换和复用电路，其包括控制芯片U40、控制芯片U41、控制芯片U42；三个控制芯片的2脚接手机应用处理器，控制芯片U40的4脚接第SIM卡的复位引脚RST，控制芯片U41的4脚接第SIM卡时钟引脚CLK，控制芯片U42的4脚接第