Design Files
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SIM Card Interface Level Translator and Supply Voltage LDO
The NVT4555 device is built for interfacing a SIM card with a single low-voltage host side interface. The NVT4555 contains an LDO that can deliver two different voltages, 1.8 V or 2.95 V from typical mobile phone battery voltages up to 5.25 V and three level translators to convert the data, RSTn and CLKn signals between a SIM card and a host microcontroller.
The NVT4555 contains one voltage select pin (CTRL) to select either 1.8 V or 2.95 V for SIM card power supply and one active HIGH enable pin (EN) to enable normal operation. The NVT4555 is compliant with all ETSI, IMT-2000 and ISO-7816 SIM/Smart card interface requirements.
Product Details
Block Diagram
Features
Key Features
- Support SIM card supply voltages 1.8 V and 2.95 V
- Input voltage range to LDO: 2.5 V to 5.25 V
- Host microcontroller operating voltage range: 1.1 V to 3.6 V
- Automatic level translation of I/O, RSTn and CLKn between SIM card and host side interface with capacitance isolation
- Low current shutdown (EN = 0) mode < 1 μA
- Supports clock speed beyond 5 MHz clock
- Incorporates shutdown feature for the SIM card signals according to ISO-7816-3
- ±8 kV IEC61000-4-2 ESD protected on all SIM card contact pins
- Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogen and antimony (Dark Green compliant)
- Available in 12-pin WLCSP package (1.19 mm x 1.62 mm x 0.56 mm (nominal), 0.4 mm pitch)
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Documentation
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Design Resources
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Independent Design House (IDH)
Hardware Design Services
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Independent Design House (IDH)
Embedded Software Design
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