NXT4558GUX

Translators, Level Shifters Overview

The NXT4558GU is a SIM card interface level translator with an enable pin, housed in an XQFN10 package (SOT1160-1). It supports supply voltages of 1.62 V to 3.3 V for the SIM side and 1.08 V to 1.98 V for the host microcontroller. The device provides automatic level translation for I/O, RST, and CLK signals between the SIM card and host interface. It features integrated pull-up resistors, EMI filters, and robust ESD protection exceeding 2 kV HBM and 8 kV contact discharge. The component operates within a temperature range of -40 °C to +85 °C.

Translators, Level Shifters Feature Summary

• Supports class-B and class-C SIM cards with automatic level translation for data, reset, and clock signals.
• Incorporates an active HIGH enable pin that initiates an ISO-7816-3 compliant shutdown sequence upon transition to LOW.
• Features integrated EMI filters to suppress digital harmonics and internal pull-up/pull-down resistors eliminating external components.
• Provides high-level ESD protection on all SIM card pins against contact and air discharge events.

Translators, Level Shifters Applications

• Mobile and personal phones
• Wireless modems
• SIM card terminals

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix GU corresponds to the XQFN10 package variant when sourcing. Confirm that the application design strictly adheres to the specified voltage ranges for both VCC_HOST and VCC_SIM inputs. Ensure proper decoupling capacitors are placed close to the power pins to meet ESD specifications and maintain signal integrity during operation.

Translators, Level Shifters Selection Notes

Select this component for designs requiring isolation between low-voltage host controllers and standard SIM card interfaces. It is suitable for applications needing a dedicated shutdown sequence to prevent data corruption during hot swaps or power loss. Verify compatibility with Class B and C SIM standards before integration into the system architecture.

Translators, Level Shifters Part Context

This device belongs to Nexperia's portfolio of logic solutions designed for miniaturization and routing simplification. It functions as a specialized interface bridge, ensuring reliable communication between varying voltage domains while maintaining compliance with international SIM card interface requirements such as ETSI and ISO-7816-3.

Translators, Level Shifters Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

Translators, Level Shifters FAQ

How does the NXT4558 handle the shutdown sequence?

A HIGH to LOW transition on the EN pin or a drop in VCC_SIM below the UVLO threshold initiates a shutdown sequence. This pulls RST_SIM, CLK_SIM, and IO_SIM LOW sequentially to comply with ISO-7816-3 standards.

What ESD protection levels does the device offer?

The device offers ESD protection exceeding 2000 V via Human Body Model (HBM) and 8 kV contact discharge / 15 kV air discharge per IEC 61000-4-2 Level 4 on all SIM card-side pins.