1 General description

The NVT4557 device is built for interfacing a SIM card with a single low-voltage 1.08 V to 1.98 V host side interface. The NVT4557 contains three 1.62 V to 3.6 V level translators to convert the data, RSTn and CLKn signals between a SIM card and a host microcontroller. The NVT4557 is compliant with all ETSI, IMT-2000 and ISO-7816 SIM/Smart card interface requirements.

2 Features and benefits

? Supports clock speed up to 10 MHz clock

? Compliant with all ETSI, IMT-2000 and ISO-7816 SIM/Smart card

interface requirements

? Support SIM card supply voltages with range of 1.62 V to 3.6 V

? Host microcontroller operating voltage range: 1.08 V to 1.98 V

? Automatic level translation of I/O, RSTn and CLKn between SIM card and host side interface with capacitance

isolation

? Incorporates shutdown feature for the SIM card signals according to ISO-7816-3

? Automatic enable and disable through VCCB (Enable pin on NVT4557HK 10 pin package only)

? Integrated pull-up and pull-down resistors

? Integrated EMI filters suppress higher harmonics of digital I/Os

? Integrated 8 kV ESD protection according to IEC 61000-4-2, level 4 on VCCB or any of the card side pins

? Level shifting buffers keep ESD stress away from the host (zero-clamping concept)

? Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogen and antimony (Dark

Green compliant)

? Available in 9-pin WLCSP package in 0.3 mm pitch and 10-pin XQFN10 package with 0.4 mm pitch

3 Applications

? NVT4557 can be used with a range of SIM card attached devices including:

– Mobile and personal phones

– Wireless modems

– SIM card terminals

NVT4557UK屬于集成電路（IC） > 轉(zhuǎn)換器，電平移位器。恩智浦半導(dǎo)體公司制造生產(chǎn)的NVT4557UK轉(zhuǎn)換器，電平移位器邏輯轉(zhuǎn)換器或電平移位器 IC 可用于在數(shù)字邏輯設(shè)備之間傳遞信息，這些設(shè)備可在不同/不兼容的供電電壓下工作，或可實(shí)現(xiàn)不同的信令方式。例如，可以將需要 5 V 電源的數(shù)字輸出傳感器連接到具有 3.3 V I/O 電源的 FPGA，或者在 CMOS 或 TTL 等單端信令方式與 PECL 或 LVDS 等差分技術(shù)之間進(jìn)行轉(zhuǎn)換。