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Details, datasheet, quote on part number:TPS9125PW
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Datasheet text preview:
TPS9125 5 V/3 V SIM SUPPLY AND LEVEL SHIFTERS
SLVS244A SEPTEMBER 1999 REVISED NOVEMBER 1999
D D D D D D D D
Integrated SIM Supply and Level Shifters Selectable 5-V or 3-V SIM Supply Voltage 3-V to 5-V Level Shifters, Bidirectional for SIM Data Line 10 kV ESD Protection (HBM) on SIMDATA, SIMRST, and SIMCLK Terminal 14 Terminal TSSOP Minimum Supply Voltage 2.7 V Integrated PullUp Resistor for DATA and SIMDATA Thin Shrink, Small Outline, Left-Hand Tape and Reel Package
PW PACKAGE (TOP VIEW)
VDD RESET MODE SIMPWR DATA CLK RST
1 2 3 4 5 6 7
14 13 12 11 10 9 8
SIMVCC VCAP1 VCAP2 SIMDATA GND SIMCLK 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 operating provided SIMPWR = 1 and VDD is sufficient (> 2.7 V). Under this condition, SIMVCC 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 (PW)
30°C to 85°C TSP9125PWR Suffix R stands for left-handed tape and reel.
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.
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.
Copyright © 1999, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
1
TPS9125 5 V/3 V SIM SUPPLY AND LEVEL SHIFTERS
SLVS244A SEPTEMBER 1999 REVISED NOVEMBER 1999
functional block diagram
VDD 20 k VCAP1 VCAP2 Voltage Generator (Charge Pump)
OSC 800 kHz VREF SIMVCC VDD or SIMVCC
SIMPWR MODE RESET
Control Block Level
10 k
DATA CLK RST
Shifter
ESD ESD ESD
SIMDATA SIMCLK SIMRST
GND
Terminal Functions
TERMINAL NAME CLK DATA GND MODE RESET RST SIMCLK SIMRST SIMDATA SIMVCC SIMPWR VCAP1 VCAP2 VDD NO. 6 5 10 3 2 7 9 8 11 14 4 13 12 1 DI DI DI DI DO DO DI/O I/O DI DI/O DESCRIPTION 3-V SIM clock signal. This terminal is connected to the SIM interface and works with 3-V logic level. 3-V bidirectional data line. This terminal is connected to the SIM interface and works with 3-V logic level. Ground Programs the SIM supply voltage to SIMVCC = 5 V (MODE = 0) or SIMVCC = 3 V (MODE = 1). Reset for the TSP9125 SIM supply and interface in case the SIM is removed under operation. 3-V SIM reset signal. This terminal is connected to the SIM interface and works with 3-V logic level. 3-V/5-V SIM clock signal. This terminal is connected to the SIM reader contacts. 3-V/5-V SIM reset signal. This terminal is connected to the SIM reader contacts. 3-V/5-V bidirectional data line. This terminal is connected to the SIM reader contacts. SIM supply voltage. Can be switched between 5 V ± 10% and 3 V ± 10%. This terminal is connected to the SIM reader contacts. Connect a 1 µF ± 20% capacitor between SIMVCC and GND. SIM supply enable terminal. SIMPWR = 0 leaves SIMVCC open, SIMPWR = 1 enables SIM supply. Charge pump capacitor. Connect 220 nF ± 20% capacitor between VCAP1 and VCAP2. Charge pump capacitor. Connect 220 nF ± 20% capacitor between VCAP1 and VCAP2. Supply voltage input. Connect a power bypass capacitor of 1 µF between VDD and GND. Connect capacitor physically close to the VDD terminal.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
TPS9125 5 V/3 V SIM SUPPLY AND LEVEL SHIFTERS
SLVS244A SEPTEMBER 1999 REVISED NOVEMBER 1999
detailed description
voltage generator (charge pump) The voltage generator can be programmed in two modes: 1. SIMPWR = 0: SIMVCC is left open, voltage generator disabled. 2. SIMPWR = 1: Depending on the signal on control terminal MODE, SIMVCC is either programmed to: a. MODE = 0: 5 V ± 10% (this is the default condition under which the system powers up), or b. MODE = 1: SIMVCC is equal to the supply voltage VDD minus a voltage drop of 50 mV maximum. The setting of the SIMVCC voltage (MODE = 0 or 1) can only be changed when SIMPWR is low. Therefore, as specified in GSM11.12, supply voltage switching is performed by deactivating the SIM and activating it at the new supply voltage. In 5-V mode, a regulated charge pump is used to step-up the 3-V supply rail (min 2.7 V) to the 5-V supply rail. The voltage generator uses two external capacitors, one pump capacitor connected between VCAP1 and VCAP2 and one output buffer capacitor connected between SIMVCC and GND. It operates at a nominal frequency of 800 kHz, and also supplies the integrated level shifters to allow for 5-V compatible logic signals on SIMRST, SIMCLK, and SIMDATA. In 3-V mode, the supply voltage VDD is connected via an integrated PMOS switch to the SIMVCC output. The charge pump, oscillator, and voltage reference are disabled in the 3-V mode to reduce power consumption. The supply voltage of the integrated level shifters is VDD minus a voltage drop of 50 mV maximum. control block The control block uses the three control signals SIMPWR, MODE, and RESET to set the TSP9125 operation modes. When SIMPWR is set low, the TSP9125 goes to power-down mode. To comply with the ISO/IEC 7816-3 specification for deactivation of the SIM contacts, the input terminals RST, DATA, and CLK must be low before the SIMPWR terminal is allowed to be taken low. When SIMPWR is low, the SIMRST, SIMDATA, and SIMCLK terminals are kept low and SIMVCC is left open. The RESET input is used to disable the TSP9125 in case the SIM card is removed from the reader under operation. The input is therefore typically connected to a mechanical or other device used to detect the removal of the SIM card. When RESET is taken low, the SIMDATA, SIMCLK, and SIMRST terminals are taken low and SIMVCC is left open, until RESET is taken high again. Table 1. Control Block Function Table
RESET 0 1 1 1 MODE X 0 1 X SIMPWR X 0 0 1 OPERATING MODE SIM supply disabled; SIMVCC open; SIMRST and SIMCLK and SIMDATA low TSP9125 in power-down mode. SIM supply disabled; SIMVCC open; SIMRST, SIMCLK, and SIMDATA low; SIMVCC programmed to 5-V mode. TSP9125 in power-down mode. SIM supply disabled; SIMVCC open; SIMRST, SIMCLK, and SIMDATA low; SIMVCC programmed to 3-V mode. TSP9125 in normal operation mode; SIM supply enabled, SIMVCC = 5 V or 3 V depending on how it was programmed.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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