Nexperia NXT4557 SIM Card Interface Level Translator with ENABLE pin

Nexperia NXT4557 SIM Card Interface Level Translator with ENABLE pin

Nexperia NXT4557 SIM Card Interface Level Translator is built for interfacing a SIM card with a single low-voltage host-side interface. The NXT4557 consists of three-level translators to convert the data, RST, and CLK signals between a SIM card and a host microcontroller. The translator features a high-speed level translation capable of supporting class-B, class-C SIM cards, and HIGH EN pin that enables the normal operation of the translator. The device is compliant with all ETSI, IMT-2000, and ISO-7816 SIM/Smart card interface requirements. Typical applications include a wide range of SIM card-attached devices, including mobile and personal phones, wireless modems, and SIM card terminals.


  • Support SIM cards and eSIM with supply voltages 1.62V to 3.3V
  • 1.08V to 1.98V host micro-controller operating voltage range
  • Automatic level translation of I/O, RST, and CLK between SIM card and host side interface with capacitance isolation
  • Incorporates shutdown feature for the SIM card signals according to ISO-7816-3
  • High Vdis(UVLO_AC) switching level, arranging quick shut down when VCC_SIM powers down
  • Integrated pull-up resistors; no external resistor required
  • Integrated EMI Filters suppress higher harmonics of digital I/Os
  • A HIGH EN signal enables the translation of the signals
  • Low current shutdown mode <1μA
  • Supports clock speed beyond 5MHz clock
  • Pb-free, Restriction of Hazardous Substances (RoHS) compliant, and free of halogen and antimony (Dark Green compliant)
  • ESD protection:
    • HBM ANSI/ESDA/JEDEC JS-001 exceeds 2kV
    • CDM ANSI/ESDA/JEDEC JS-002 exceeds 1kV
    • IEC61000-4-2 level 4, contact and air discharge on all SIM card-side pins are 8kV and 15kV
  • Available in a 10-pin XQFN package

Block Diagram

Application Circuit

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