CompactFlash CardHide

What is a Compact Flash Card? What is a CF Card?

Compact Flash Card Design:
CompactFlash defines a physical interface which is smaller than, but electrically identical to, the PCMCIA-ATA interface. That is, it appears to the host device as if it were a hard disk of some defined size and has a tiny IDE controller onboard the CF device itself.

CompactFlash are designed with flash technology, a non-volatile storage solution that does not require a battery to retain data indefinitely. CF storage products are solid state, meaning they contain no moving parts, and provide users with much greater protection of their data than conventional magnetic disk drives. They are five to ten times more rugged and reliable than disk drives including those found in PC Card Type III products. CF cards consume only five percent of the power required by small disk drives.

Compact Flash Card Operation/Voltage:
Aimed towards the professional market, the CF Card was made to meet the extreme demands of photo shoots under severe weather conditions such as heat, cold, wind, rain, and snow. It can perform in the most extreme environments and temperatures from -13 degrees F to 185 degrees F (-25 C to 85 C).

CompactFlash cards support both 3.3V and 5V operation and can be interchanged between 3.3V and 5V systems. This means that any CF card can operate at either voltage. Other small form factor flash cards may be available to operate at 3.3V or 5V, but any single card can operate at only one of the voltages. CF data storage cards are also available using magnetic disk (Microdrive).


What are the differences between data transfer rates for Compact Flash Cards/ CF Cards?





CF+ standard, revision 2.0

16 MB/second

CF 3.0 and 4.0 standards

supports up to 66 MB/second

CF 4.0 standard supports IDE Ultra DMA 133

maximum rate of 133MM/second


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