September, 2016, REV3.0
Dual SIM Card Controller
The BCT4302B is a dual SIM card control chip optimized for GSM/EDGE/GPRS/3G handsets, It provides
the power conversion and signal level translation needed for advanced cell phones to interface with 1.8V
and 3V SIMs. The device meets all requirements for 1.8V and 3V SIMs and contains LDO regulators to
power 1.8V or 3V SIM card from a 2.7V to 5.5V input. A serial port interface(SPI) is used to control dual
SIM channel individually. The BCT4302B I/O voltage can support 1.65V to 5.5V.
The BCT4302B is available in 20-pin 3mm x 3mm QFN package. The operating temperature range is from
-25°C to +85°C.
Support dual SIM card interface
GSM, EDGE, GPRS and 3G Cell Phones
♦ CMOS Technology for dual SIM card controlling
♦ Control and communication through a SPI interface with baseband processor.
♦ Power management and control for two SIM cards
♦ Independent 1.8/3V VCC control for each SIM card
♦ Fast channel switching
♦ Independent clock stop mode (at high or low level) for each SIM card
♦ Temperature Range: –25°C to 85°C
♦ 8KV ESD on SIM Card Pins
♦ 20-pin 3mm x 3mm QFN package (Pb-free & Green available):
–25°C to +85°C
Connection Diagram (Top View)