TPS9125

5 V/3 V SIM SUPPLY AND LEVEL SHIFTERS

SLVS244A – SEPTEMBER 1999 – REVISED NOVEMBER 1999

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POST OFFICE BOX 655303

SIM Data Line

SIMRST, and SIMCLK Terminal

SIMDATA

and Reel Package

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

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.

voltage is generated by the SIM supply charge pump.

A RESET terminal is provided for security reasons to switch off the SIM supply and interface if the SIM card is

disconnected or removed by accident.

The TSP9125 is packaged in TI’s thin shrink small-outline package (PW).

AVAILABLE OPTIONS

TA

PACKAGE

TA

(PW)

–30

°C to 85°C

TSP9125PWR†

† Suffix R stands for left-handed tape and reel.

Copyright

© 1999, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

TI is a trademark of Texas Instruments Incorporated.

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RESET

MODE

SIMPWR

DATA

CLK

RST

SIMVCC

VCAP1

VCAP2

SIMDATA

GND

SIMCLK

SIMRST

PW PACKAGE

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