NXT4559UPZ

Translators, Level Shifters Overview

The NXT4559UPZ is a SIM card interface level translator manufactured by Nexperia, designed to interface a SIM card with a single low-voltage host side interface. It features three level translators to convert data, RST, and CLK signals between the SIM card and a host microcontroller. The device supports class-B and class-C SIM cards with supply voltages ranging from 1.62 V to 3.3 V for the SIM side and 1.08 V to 1.98 V for the host side. It operates within an ambient temperature range of -40 °C to +85 °C and is housed in a WLCSP-9 package (SOT8027-1).

Translators, Level Shifters Feature Summary

• Automatic level translation of I/O, RST, and CLK signals between SIM card and host side interface with capacitance isolation.
• Incorporates shutdown feature for SIM card signals according to ISO-7816-3 standards.
• Integrated EMI filters suppress higher harmonics of digital I/Os.
• Robust ESD protection exceeding 2000 V HBM and 1000 V CDM.

Translators, Level Shifters Applications

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

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix UPZ corresponds to the WLCSP9 package variant SOT8027-1 as documented in the official Nexperia datasheet. Confirm that the component meets RoHS compliance and Dark Green specifications regarding halogen and antimony content. Ensure design compatibility with the specified voltage ranges and temperature operating conditions before finalizing procurement.

Translators, Level Shifters Selection Notes

Select this component when interfacing SIM cards or eSIM modules with low-voltage host microcontrollers requiring automatic signal translation. It is suitable for designs needing integrated pull-up resistors and EMI filtering without external components. Consider its compact WLCSP footprint for space-constrained mobile applications requiring high-speed translation capabilities.

Translators, Level Shifters Part Context

The NXT4559UPZ belongs to the NXT4559 family of SIM card interface level translators produced by Nexperia. This series is engineered to meet ETSI, IMT-2000, and ISO-7816 SIM/Smart card interface requirements. The device provides a reliable solution for managing signal levels between different voltage domains in portable electronic devices.

Translators, Level Shifters Replacement Considerations

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

Translators, Level Shifters FAQ

How does the NXT4559 handle power-down sequences?

When VCC_SIM drops below the UVLO_AC switching level, the device initiates a shutdown sequence on SIM card pins in accordance with ISO-7816-3, ensuring proper disabling of the card.

What is the maximum clock speed supported?

The NXT4559 supports clock speeds beyond 5 MHz, with a specified maximum clock frequency of 25 MHz for the CLK channel in push-pull mode.