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  • Translate Voltages for a SIM Card

    • SCLA044 April   2021 SN74HC00

       

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  • Translate Voltages for a SIM Card
  1.   1
  2.   Design Considerations
  3.   3
  4. IMPORTANT NOTICE
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APPLICATION BRIEF

Translate Voltages for a SIM Card

Subscriber Identity Modules, commonly called SIM cards, are used to store secure information in mobile devices for use in communications. This type of voltage translation applies to SIM, USIM, and UICC.

GUID-20210330-CA0I-2N34-GNCJ-S7Q9VCLCTSJ6-low.svg Figure 1-1 Example SIM Card Voltage Translation Block Diagram

Design Considerations

Design Considerations

  • Clock signals can be up to 5 MHz
  • Translators enable communication when devices have mismatched logic voltage levels
  • Prevent damage to devices that cannot support higher voltage inputs
  • Improve data rates over discrete translation solutions
  • Protect controller while peripheral is not connected
  • [FAQ] How does a slow or floating input affect a CMOS device?
  • Need additional assistance? Ask our engineers a question on the TI E2E™ Logic Support Forum

Table 1-1 Recommended Parts
Part Number Automotive Qualified Supported Card Types Features
Class A
5 V
Class B
3 V
Class C
1.8 V
TXS0104E ✓ ✓ ✓ Auto-bidirectional voltage translation for all channels
Supports all voltages and frequencies for SIM/UICC
Increased ESD protection on B ports
TXS0104E-Q1 ✓ ✓ ✓ ✓
TXS4555 ✓ ✓ Complete SIM/UICC translator solution
Integrated LDO regulator
Increased ESD protection on card-side
TXS02326A ✓ ✓ Complete dual SIM/UICC translator and multiplexer solution
Dual integrated LDO regulators
I2C communication with baseband processor
Increased ESD protection on card-side

For more devices, browse through the online parametric tool where you can sort by desired voltage, channel numbers, and other features.

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