SD Card

(redirected from miniSDHC)

SD Card

(Secure Digital Memory Card) A family of very popular flash memory cards used for storage in portable devices. Introduced in 1999 by Panasonic, Toshiba and SanDisk, the original, full-size SD Card is the most popular digital camera storage, and the smaller mini and micro versions are widely used in mobile devices. Cards come in various write speeds for video recording (for details, see SD Card classes).

Although SD Cards support encryption and content protection (the "Secure" in SD), they have been mostly used for regular storage. SD uses NAND flash technology (see flash memory).

Full-Size Card
With capacities available up to 1TB, the full-size SD Card is the original and largest in the series. It uses the same 32x24mm form factor but is slightly thicker than its MultiMediaCard predecessor (see MMC), and SD Card readers accept both formats.

Mini and Micro Sizes
Introduced in 2003 and 2005 respectively, the smaller miniSD and microSD formats are electrically and software compatible with the full-size SD. Using adapters, they plug into full-size slots (see illustration below). Subsequent SDHC and SDXC formats also came in mini and micro versions; however, all miniSD cards were nowhere near as popular as the microSD formats (see microSD).

SDHC (High Capacity) and SDXC (Extended Capacity)
In 2006, SDHC cards using the FAT32 file system superseded the original SD format, which used FAT16, and SDHC devices support SD. Introduced in 2009, SDXC cards raised the maximum capacity to 2TB by using the exFAT file system, and SDXC devices also support SDHC cards. See Video HD, Eye-Fi, gruvi card and SDIO card.

Ultra High Speed - UHS-I/II
In 2010, the UHS-I interface was introduced for SDHC and SDXC cards, dramatically increasing the bus speed for 4K video and continuous still recording. For more details, see SD Card classes.

Micro, Mini and Full-Size
The full-size SD Card (right) is approximately 1.25 inches tall by one inch wide. The "gruvi" is a copy protected microSD. (Image courtesy of SanDisk Corporation,

SD Card Adapter
Devices that use miniSDs and microSDs accept only those card types, but general-purpose SD readers have full-size slots and require adapters for the smaller cards.
References in periodicals archive ?
SD, SDHC, miniSDHC, microSDHC, SDXC and microSDXC Logos are trademarks of SD-3C, LLC.
Toshiba), a leading innovator in memory card solutions, has announced the latest enhancements to its extensive line-up of SD Memory Cards: a 4-gigabyte(1) (GB) Class 6 SDHC Card; a 4GB Class 4 miniSDHC Card; and a 2GB microSD Memory Card.
Versatile: when combined with an adapter, can be used as a full-size SDHC card with write protection or as a miniSDHC card to transfer data
00 -- Versatile: 8GB Multi-Kit can be used as a USB and full-size SDHC card with write protection or as a miniSDHC card to transfer data (with adapters) -- Compatible: with microSDHC, miniSDHC and SDHC host devices (with adapter); not compatible with standard microSD/miniSD/SD-enabled devices/readers -- File Format: FAT 32 -- Reliable: lifetime warranty on cards*; two-year warranty on reader -- Capacity**: 4GB, 8GB -- Dimensions: 0.
The flash memory compatibility includes support for both standard MiniSD(TM) and high-capacity MiniSDHC modules and can be swapped out depending upon user requirements.
Toshiba offers the latest high-capacity, high-performance memory cards, including SD, SD High-Capacity (SDHC), miniSD(TM), miniSDHC, microSD(TM) and microSDHC.
Announcing 4GB Class 6 SDHC Card, 4GB Class 4 miniSDHC Card, and 2GB microSD Card
In addition to unveiling the world's fastest memory module and USB flash drive, Patriot will introduce the 16GB SDHC class 6 card, 4GB microSDHC card, 4GB miniSDHC card, 8GB Xporter USB flash drive, multi-pack flash memory retail packages and other innovative memory products.
2 Compatible memory cards include CompactFlash Card, Microdrive, Memory Stick, Memory Stick Pro, Memory Stick Duo, Memory Stick Pro Duo, SD Card, miniSD Card, microSD Card, SDHC Card, miniSDHC Card, microSDHC Card, MultiMediaCard, MMCplus Card and HC MMCplus Card.
At the CTIA Wireless Show in Los Angeles, the company announced the highest capacity card for cellphones, the 4GB SanDisk miniSDHC card.
Versatile: can be used as full-size SDHC or miniSDHC card with appropriate adapter
4GB miniSDHC Memory Cards Poised to Support Next Generation Mobile Phones, Digital Devices Requiring Larger Capacities, Faster Speeds -- in Smaller Form Factor