General description

The device is an SD 3.0-compliant bidirectional dual voltage level translator with autodirection

control. It is designed to interface between a memory or SIM card operating

between 1.62 V to 3.6 V signal levels and a host with a supply voltage of 1.08 V to

1.98 V. The device supports SD 3.0 SDR104, SDR50, DDR50, SDR25, SDR12 and SD 2.0 High-

Speed (50 MHz) and Default-Speed (25 MHz) modes. The device has an auto-enable/

disable function connected to the VCCB supply pin, built-in EMI filters and robust ESD

protections (IEC 61000-4-2, level 4) on VCCB or any of the card side pins. External ESD

diodes are not required. This device also supports SIM card voltage level translator using CLK and two of the data lines for SD and SIM card combo sockets.

Features and benefits

? Supports up to 208 MHz clock rate

? SD 3.0 specification-compliant voltage translation to support SDR104, SDR50, DDR50,

SDR25, SDR12, High-Speed and Default-Speed modes

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

requirements

? Support SD/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

? Feedback channel for clock synchronization

? Low power consumption by push-pull output stage with break-before-make architecture

? Automatic enable and disable through VCCB

? 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 on VCCB or any

of the card side pins

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

? Available in XQFN16 with 0.4 mm pitch and WLCSP16 with 0.35 mm pitch

Applications

? Smart phones

? Mobile handsets

? Digital cameras

? Tablet PCs

? Laptop computers

? SD, MMC or microSD card readers

NVT4858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NVT4858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。