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.
Figure 1-1 Example SIM Card Voltage
Translation Block DiagramDesign 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.