1. General description
The NXT4558-Q100 device is built for interfacing a SIM card with a single low-voltage host side
interface. The NXT4558-Q100 has three level translators to convert the data, RST and CLK
signals between a SIM card and a host microcontroller. A high-speed level translation capable of
supporting class-B, class-C SIM cards. An active HIGH EN pin enables normal operation of the
translator. A HIGH to LOW transition on pin EN initiates a shutdown sequence on SIM card pins in
accordance with ISO-7816-3.
The NXT4558-Q100 is compliant with all ETSI, IMT-2000 and ISO-7816 SIM/Smart card interface
requirements.

2. Features and benefits
• Automotive product qualification in accordance with AEC-Q100 (Grade 1)
• Specified from -40 °C to +85 °C and from -40 °C to +125 °C
• Support SIM cards and eSIM with supply voltages 1.62 V to 3.3 V
• Host micro-controller operating voltage range: 1.08 V to 1.98 V
• 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 suppresses higher harmonics of digital I/O's
• A HIGH EN signal enables the translation of the signals
• Low current shutdown mode < 1 μA
• Supports clock speed beyond 5 MHz clock
• Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogen and
antimony (Dark Green compliant)
• Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
• ESD protection:
• HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
• CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
• IEC61000-4-2 level 4, contact and air discharge on all SIM card-side pins are 8kV and
15 kV
• Available in 10-pin XQFN package

3. Applications
• NXT4558-Q100 can be used with a range of SIM card attached devices including:
• Telematic Control Units
• SIM card interfaces
• Wireless Point-to-Sale terminals