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CompactFlash (CF) is a flash memory mass storage device used mainly in portable electronic devices. The format was specified and the devices were first manufactured by SanDisk in 1994. [3] CompactFlash became one of the most successful of the early memory card formats, surpassing Miniature Card and SmartMedia.
CompactFlash: SanDisk: I 1994 512 GB (CF5 128*2 50 bytes) Thinner (3.3 mm), flash only, now up to 512 GB, although standard goes up to 128 PB since CF 5.0 [2] II Thicker (5.0 mm), older flash, but usually Microdrives, up to 128 PiB [2] CFexpress: CompactFlash Association: 1.0 2017 1 TB
CF & SD Controllers Fusion-io [1] Acquired by SanDisk then Western Digital: United States Captive Yes Yes Yes Greenliant Systems [2] United States Independent No Yes Yes Hyperstone [3] Germany Independent No Yes Yes Indilinx [4] Acquired by Toshiba then Kioxia: South Korea: Captive Yes Yes No Intel [5] United States Captive Yes Yes No ...
CFexpress is a standard for removable media cards proposed by the CompactFlash Association (CFA). The standard uses the NVM Express protocol over a PCIe 3.0 interface with 1 to 4 lanes where 1 GB/s data can be provided per lane.
In contrast, the CompactFlash format is described by completely open and free specifications. Has not kept up with the transfer rate, or speed, of other cards, notably CompactFlash and SD, but also the later versions of the Memory Stick. The fastest xD card offers less than 10% of the speed of current (2009) CompactFlash cards. [citation needed]
Unveiled in 1997 by SanDisk and Siemens, [1] MMC is based on a surface-contact low-pin-count serial interface using a single memory stack substrate assembly, and is therefore much smaller than earlier systems based on high-pin-count parallel interfaces using traditional surface-mount assembly such as CompactFlash.