TPS9125

TPS9125 5 V/3 V SIM SUPPLY AND LEVEL SHIFTERS D Integrated SIM Supply and Level Shifters D Selectable 5-V or 3-V SIM Supply Voltage D 3-V to 5-V Level Shifters, Bidirectional for SIM Data Line D 10 kV ESD Protection (HBM) on SIMDATA, SIMRST, and SIMCLK Terminal D 14 Terminal TSSOP D Minimum Supply Voltage 2.7 V D Integrated PullUp Resistor for DATA and SIMDATA D Thin Shrink, Small Outline, Left-Hand Tape and Reel Package SLVS244A – SEPTEMBER 1999 – REVISED NOVEMBER 1999 PW PACKAGE (TOP VIEW) VDD RESET MODE SIMPWR DATA CLK RST 1 2 3 4 5 6 7 14 SIMVCC 13 VCAP1 12 VCAP2 11 SIMDATA 10 GND 9 SIMCLK 8 SIMRST description The TPS9125 SIM supply and level shifter integrates a programmable 3-V or 5-V SIM supply, conformable to the (GSM) test specification 11.10, together with either a 3-V or 5-V level shifter, conformable to the GSM specification 11.11 and 11.12. A charge pump, utilizing two external capacitors, is configured as voltage doubler to generate a 5-V supply rail from VDD. Dependent on the SIM card used, a control signal coming from the SIM card controller is applied on the MODE terminal to switch between a 3-V or 5-V supply on the SIMVCC output terminal. A 3-V/5-V bidirectional level shifter translates the 3-V compatible logic signal on DATA terminal into a 5-V compatible logic signal SIMDATA terminal, and vice versa. RST and CLK are unidirectional level shifters, providing a 5-V SIMRST and SIMCLK signal from the microcontroller to the SIM card. The SIM supply is op...