SIM Card Interface Level Translator with I²C-Bus Control and LDO

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Block Diagram

NVT4555 Block Diagram

NVT4555 Block Diagram


Key Features

  • Support SIM card supply voltages 1.8 V and 3 V
  • Input voltage range to LDO: 2.5 V to 5.25 V
  • Host microcontroller operating voltage range: 1.55 V to 3.6 V
  • VCC input pin provides both host supply voltage and logic level hardware enable/disable pin: source through Host GPIO (ICC<100 μA)
  • RST_HOST/EN pin can be programmed as a reset pin or as a device enable/disable pin
  • Level translation of I/O, RSTn and CLKn between SIM card and host-side interface with capacitive isolation
  • I²C-bus interface for device enable and LDO voltage selection
  • Low current shutdown mode < 3 μA
  • Supports clock speed beyond 5 MHz clock
  • Supports CLK stop mode
  • Integrated EMI filters
  • Incorporates ISO-7816-3 shutdown feature for the SIM card signals
  • ETSI, IMT2000 and ISO-7816 compliant
  • ±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 (1.205 mm × 1.605 mm × 0.412 mm, 0.4 mm pitch)


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  • Symbols and Footprints

    NVT4556AUK_WLCSP-CAD Symbol and PCB Footprint – BXL File


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