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A compact flash SD card is electronic data storage device use to store data. It is vastly used in mobile phones, music player and cameras. These are small and re-writable. There are two types of these kinds of cards, Type I and Type II with different card speed.
Technical details
The physical interface is small. These micro SD cards are just like host device, you can compare it with a hard disk. These cards can be used to variety of digital devices and use 3.3 volts or some higher SD cards use 5 volts. The design technology is excellent and can bear a hard temperature.
Speed
These mobile SD cards are non-volatile. Solid-state technology made these even batters in performance. The transfer rate is more than 45 MB/s and only use round about 5 percent of the power. Like other cards the speed is measured in x ratings much like CD-ROMs measuring system. There are different speeds available ranging from 8x up to 133x. 150kB/s is the base and you can calculate the speed of the card by multiply it with any x range.
File system
FAT 32 file system is used in these compact flash SD cards which are best so far for the storage of any digital data. Modern mobile phones with multiple applications, high graphics and high resolution cameras need something to hold all the data so these cards are best choice for phones.
Type I and Type II
Type I cards are 3.3mm thick and Type II cards are 5mm thick which is the only and basic physical difference. There is one electrical difference, and that is Type I cards are allowed to consume up to 70mA and Type II cards are allowed to consume up to 500mA supply current.
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