NXP Semiconductors NVT4555 & NVT4556 SIM Interface Level Translators

NXP Semiconductors NVT4555 and NVT4556 SIM Interface Level Translators are built for interfacing a SIM card with a single low-voltage host side interface. They each contain an LDO that can deliver two different voltages, 1.8V or 2.95V from typical mobile phone battery voltages up to 5.25V and three level translators to convert the data, RSTn and CLKn signals between a SIM card and a host microcontroller. The NVT4555 contains one voltage select pin (CTRL) to select either 1.8V or 2.95V for SIM card power supply and one active HIGH enable pin (EN) to enable normal operation. The NVT4556 also uses the I2C-bus interface to enable normal operation and to select either 1.8V or 3V for the SIM card power supply. Each device is compliant with all ETSI, IMT-2000 and ISO-7816 SIM/Smart card interface requirements.

The NXP Semiconductors NVT4555 and NVT4556 SIM Card Interface Level Translators are available in a compact 1.19mm x 1.62mm x 0.56mm WLCSP12 package and are Pb-free, RoHS compliant, and free of halogen and antimony.

Features

Support SIM card supply voltages:
- NVT4555: 1.8V and 2.95V
- NVT4556: 1.8V and 3V
Input voltage range to LDO: 2.5V to 5.25V
Host microcontroller operating voltage range:
- NVT4555: 1.1V to 3.6V
- NVT4556: 1.55V to 3.6V
Level translation of I/O, RSTn and CLKn between SIM card and host-side interface with capacitive isolation

Low current shutdown (EN = 0) mode:
- NVT4555 < 1µA
- NVT4556 < 3µA
Supports clock speed beyond 5MHz clock
Incorporates ISO-7816-3 shutdown feature for the SIM card signals
±8 kV IEC61000-4-2 ESD protected on all SIM card contact pins
Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogen and antimony (Dark Green compliant)
Available in 12-pin WLCSP package

Applications

NVT4555 and NVT4556 can be used with a range of SIM card attached devices including:
- Mobile and personal phones
- Wireless modems
- SIM card terminals