General description 

The device is an SD 3.0-compliant bidirectional dual voltage level translator with auto-direction control. It is designed to interface between a memory card operating at 1.8 V or 3.0 V signal levels and a host with a nominal supply voltage of 1.2 V to 1.8 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 integrated voltage selectable low dropout regulator to supply the card-side I/Os, an auto-enable/ disable function connected to the VSD supply pin, built-in EMI filters and robust ESD protections (IEC 61000-4-2, level 4). 

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 

• 1.2 V to 1.8 V host side interface voltage support 

• Feedback channel for clock synchronization 

• 100 mA Low dropout voltage regulator to supply the card-side I/Os 

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

• Automatic enable and disable through VSD 

• Integrated pull-up and pull-down resistors: no external resistors required 

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

• Integrated 8 kV ESD protection according to IEC 61000-4-2, level 4 on card side 

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

• 20-ball WLCSP; pitch 0.4 mm 

Applications 

• Smart phones 

• Mobiles handsets 

• Digital cameras 

• Tablet PCs 

• Laptop computers 

• SD, MMC or microSD card readers

NVT4857UK Datasheet Download