CF storage cards are based on the Parallel ATA interface (PATA). These products are used in Professional Imaging, both for still and video recording markets. These products are preferred by professionals for both their performance and their handling characteristics.
CF cards come in either Type I (3.3mm) or Type II (5.0mm) and have the following dimensions.
Thickness Including Label Area
3.3 mm / 5.0 mm
CF storage cards are also used widely in the industrial and communications market, due to their robustness and handling quality.
CF 4.1aproducts are widely available at speeds up to 90 MB/s sequential access speed. Compliant CF Cards implementing CF 4.1a use this logo.
CF 5.0products include more efficient commands along with support for Trim operations providing consistent speed. Compliant CF Cards implementing CF 5.0 display this logo.
The CF 6.0 specification implements UDMA7 which provides higher performance bus speeds up to 167MB/sec along with support for the new Sanitize command (the ultimate card refresh). (will need to update with 6.1 extended capacity message and 6.1 distinguisher)