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NXT4557

SIM card interface level translator with enable pin

The NXT4557 device is built for interfacing a SIM card with a single low-voltage host side interface. The NXT4557 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 NXT4557 is compliant with all ETSI, IMT-2000 and ISO-7816 SIM/Smart card interface requirements.

Features and benefits

  • 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)

  • ESD protection:

    • HBM ANSI/ESDA/JEDEC JS-001 exceeds 2 kV

    • CDM ANSI/ESDA/JEDEC JS-002 exceeds 1 kV

    • 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

Applications

  • NXT4557 can be used with a range of SIM card attached devices including:

    • Mobile and personal phones

    • Wireless modems

    • SIM card terminals

Parametrics

Type numberProduct statusVCC(A) (V)VCC(B) (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Nr of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
NXT4557GUProduction1.08 - 1.981.62 - 3.3CMOS± 1203low-40~851185.1144XQFN10

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
NXT4557GU
XQFN10
(SOT1160-1) 		SOT1160-1SOT1160-1_115Activez7NXT4557GUX
( 9356 911 91115 )

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
NXT4557GUNXT4557GUXNXT4557GU
Quality and reliability disclaimer

Documentation (3)

File nameTitleTypeDate
NXT4557SIM card interface level translator with enable pinData sheet2023-05-22
nxt4557NXT4557 IBIS modelIBIS model2021-08-31
SOT1160-1plastic, leadless extremely thin quad flat package; 10 terminals; 0.4 mm pitch; 1.4 mm x 1.8 mm x 0.5 mm bodyPackage information2022-06-07

Support

If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.

Models

File nameTitleTypeDate
nxt4557NXT4557 IBIS modelIBIS model2021-08-31

Ordering, pricing & availability

Sample

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Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.