NCN4555MNR2

Translators, Level Shifters Overview

The NCN4555MNR2 is a smart card interface IC designed for SIM card power supply and level shifting. It integrates an LDO-type DC-DC converter to drive 1.8 V or 3.0 V SIM cards, selectable via the MOD_VCC pin. The device translates voltages between the SIM card and external microcontrollers, supporting ISO7816-3, GSM 11.11, and 3G standards. It features a low current shutdown mode activated by the STOP pin to extend battery life. The IC provides ESD protection exceeding 7 kV on SIM pins and supports clock frequencies up to 5 MHz.

Translators, Level Shifters Feature Summary

• Integrates a programmable LDO-type DC-DC converter capable of supplying over 50 mA for 1.8 V or 3.0 V SIM cards.
• Includes bidirectional level shifters with built-in pullup resistors for I/O, RESET, and CLOCK signals.
• Features comprehensive ESD protection on all pins, exceeding 7 kV Human Body Model on SIM interface pins.
• Supports a low current shutdown mode via the STOP pin to minimize power consumption.

Translators, Level Shifters Applications

• SIM Card Interface Circuit for 2G, 2.5G and 3G Mobile Phones
• Identification Module
• Smart Card Readers
• Wireless PC Cards

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix (R2) corresponds to the tape and reel packaging configuration required for your assembly line. Confirm that the component meets RoHS compliance standards if applicable to your manufacturing requirements. Ensure the QFN-16 package dimensions align with your PCB footprint design guidelines before finalizing procurement.

Translators, Level Shifters Selection Notes

Select this component when a combined power supply and level shifting solution is needed for 1.8 V or 3.0 V SIM interfaces. It is suitable for applications requiring low quiescent current and high ESD immunity. Consider the QFN-16 package size constraints and thermal dissipation capabilities relative to your system's ambient operating temperature range.

Translators, Level Shifters Part Context

This part belongs to the NCN4555 series from onsemi, specifically designed as a Smartcard Interface IC. It serves as a bridge between mobile application processors and SIM modules, handling both power regulation and signal translation. The MNR2 suffix indicates the specific reel packaging variant within this product family.

Translators, Level Shifters Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio that offer similar voltage levels and package types. Verify that any substitute maintains the required ESD protection ratings and shutdown functionality.

Translators, Level Shifters FAQ

How is the SIM card supply voltage selected?

The SIM_VCC output voltage is programmed using the MOD_VCC input pin. A logic low selects 1.8 V, while a logic high selects 3.0 V.

What is the purpose of the STOP pin?

The STOP pin activates a low current shutdown mode when set to Low, turning off the SIM_VCC regulator to save power. Setting it High enables normal operation.

Does the device include internal pullup resistors?

Yes, the NCN4555 includes built-in pullup resistors for the I/O pins in both directions to ensure proper high impedance states.