NVT4556是NXP公司的一款I2C電壓轉換器產品，NVT4556是SIM card interface level translator with I2C-bus control and LDO，本站介紹了NVT4556的封裝應用圖解、特點和優(yōu)點、功能等，并給出了與NVT4556相關的NXP元器件型號供參考。
NVT4556 - SIM card interface level translator with I2C-bus control and LDO - I2C電壓轉換器 - I2C - 恩智浦, LLC
The NVT4556 device is built for interfacing a SIM card with a single low-voltage host-sideinterface. The NVT4556 contains an LDO that can deliver two different voltages, 1.8 V or3 V, from a typical mobile phone battery voltage, and three level translators to convert thedata, RSTn and CLKn signals between a SIM card and a host microcontroller.
The NVT4556 VCC pin provides power to the host side I/Os and doubles as an enable pin,for this reason it can be connected to a GPIO that matches the host side voltage. The totalcurrent draw from the VCC pin is only 100 μA maximum. The NVT4556 also uses theI2C-bus interface to enable normal operation and to select either 1.8 V or 3 V for the SIMcard power supply. The NVT4556 can also disable the LDO functionality while maintainingthe level translator paths so that the user can use a system-controlled regulator to powerthe SIM card power supply. The NVT4556 can enable users to provide second and thirdSIM card functionality with a low-voltage one host SIM port, at the same time reducing thenumber of GPIOs used in the system. The NVT4556 is compliant with all ETSI, IMT-2000and ISO-7816 SIM/Smart card interface requirements.
The NVT4556 is available in a 12-pin WLCSP package and has three factoryprogrammed slave address options.
- Support SIM card supply voltages 1.8 V and 3 V
- Input voltage range to LDO: 2.5 V to 5.25 V
- Host microcontroller operating voltage range: 1.55 V to 3.6 V
- VCC input pin provides both host supply voltage and logic level hardwareenable/disable pin: source through Host GPIO (ICC<100 μA)
- RST_HOST/EN pin can be programmed as a reset pin or as a device enable/disablepin
- Level translation of I/O, RSTn and CLKn between SIM card and host-side interfacewith capacitive isolation
- I2C-bus interface for device enable and LDO voltage selection
- Low current shutdown mode < 3 μA
- Supports clock speed beyond 5 MHz clock
- Supports CLK stop mode
- Integrated EMI filters
- Incorporates ISO-7816-3 shutdown feature for the SIM card signals
- ETSI, IMT2000 and ISO-7816 compliant
- ±8 kV IEC61000-4-2 ESD protected on all SIM card contact pins
- Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogenand antimony (Dark Green compliant)
- Available in 12-pin WLCSP package (1.205 mm × 1.605 mm × 0.412 mm,0.4 mm pitch)
- NVT4556 can be used with a range of SIM card attached devices including:
- Mobile and personal phones
- Wireless modems
- SIM card terminals
