Fangtek's ft6188 is a SIM card control device designed for dual SIM card enabled mobile phones. The ft6188
supports both 1.8V and 3.3V SIM cards with integrated LDOs and level shifters. A Serial Port Interface (SPI) is
used to configure and control the both cards.
The ft6188 works as a SIM card switch to bring card to operation in turns at specified interval. The device
adopts a break-before-make switching scheme, i.e., to break the connection with a card before getting
connected with the other so as to avoid possible communication collision.
The ft6188 features the internal LDO and level shifter to support both 1.8V and 3.3V cards and thus provides a
universal SIM card interface.
The ft6188 SPI control interface is designed to communicate with microprocessors or controllers, such as cell
phone baseband chip. The three-line interface provides easy access with the universal data communication
standards, as well as saves the GPIO communication pins which are precious resource on microprocessors.
The ft6188 is available in 3mm x 3mm QFN20 package, 0.4mm.
ƒ Supply Range: 2.7V to 5.5V
ƒ I BAT(SD) : 0.1µA
ƒ 1.8V Mode Output Range: 1.65V to 1.95V
ƒ 3.3V Mode Output Range: 2.82V to 3.18V
ƒ Maximum Output Current: 38mA (typical)
ƒ Turn-on Time: 0.8ms (typical); 1.5ms (max.)
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