Standard was jointly developed
in 1997 by SanDisk and Siemens (now Infineon) to allow further miniaturization
of digital equipment.
The MultiMediaCard was then further developed to the SD Card.
The MultiMediaCard (32 x 24 x 1.4 mm) has the same footprint
as the SD Card (2.1 mm height) but is 0.7 mm thinner and
has 7 instead of 9 pins.
It uses the same flash technology as CompactFlash and PC Cards,
but the data is transferred serially rather than the parallel
data transfer used by the ATA protocol.
media is the size of a postage stamp and the cards are
used both in industrial applications and in consumer
A PC Card
Adapter which was developed by altec allows
MultiMediaCards to be used in any PC Card Type II slot,
such as that found
in nearly all notebook PCs and altec
Flash Card drives.
The RS-MMC (Reduced Size MultiMediaCard) is a further miniaturized
above and top right:
|| Versions (with
32 MB SanDisk MultiMediaCard
altec Item no.: 17SD32J
SanDisk Item no.: SDMJ-32
64 MB SanDisk MultiMediaCard
altec Item no.: 17SD64J
SanDisk Item no.: SDMJ-64
128 MB SanDisk MultiMediaCard
altec Item no.: 17SD128J
SanDisk Item no.: SDMJ-128
Replacement products are SD Cards. Almost all applications
are compatible with SD Cards.
For the few legacy applications that are restricted to MMC form factor due to Z height requirements,
the RS-MMC with extender is a suitable replacement.