page_title: SD card
section_title: Ultra High Speed (UHS)
hierarchical_section_title: SD card / Speed / Bus / Ultra High Speed (UHS)
caption_attribution_description: English: Connector side of an Lexar 1000x MicroSDHC UHS-II U3 Class 10 showing the specific UHS-II connector
context_page_description: Secure Digital, officially abbreviated as SD, is a proprietary non-volatile memory card format developed by the SD Association for use in portable devices.
  The standard was introduced in August 1999 by joint efforts between SanDisk, Panasonic and Toshiba as an improvement over MultiMediaCards, and has become the industry standard. The three companies formed SD-3C, LLC, a company that licenses and enforces intellectual property rights associated with SD memory cards and SD host and ancillary products.
  The companies also formed the SD Association, a non-profit organization, in January 2000 to promote and create SD Card standards. SDA today has about 1,000 member companies. The SDA uses several trademarked logos owned and licensed by SD-3C to enforce compliance with its specifications and assure users of compatibility.
context_section_description: The Ultra High Speed (UHS) bus is available on some SDHC and SDXC cards. The following ultra-high speeds are specified:
caption: Back side of a Lexar UHS-II microSDHC card, showing the additional row of UHS-II connections
exif: {"Image Make": "Canon", "Image Model": "Canon EOS 7D", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS6 Windows", "Image DateTime": "2015-10-31T11:14:17+01:00", "Image Artist": "Nicolas Herrmann", "Image ExifOffset": "232", "EXIF ExposureTime": "3/10", "EXIF FNumber": "28/5", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "1600", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2015:10:31 11:54:56", "EXIF DateTimeDigitized": "2015:10:31 11:54:56", "EXIF ShutterSpeedValue": "868483/500000", "EXIF ApertureValue": "2485427/500000", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "100", "EXIF SubSecTime": "65", "EXIF SubSecTimeOriginal": "65", "EXIF SubSecTimeDigitized": "65", "EXIF ExifImageWidth": "1684", "EXIF ExifImageLength": "2228", "EXIF FocalPlaneXResolution": "5184000/907", "EXIF FocalPlaneYResolution": "691200/119", "EXIF FocalPlaneResolutionUnit": "2", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard"}