MultiMediaCard standard was introduced in 1997 and is used by companies such as HP, Nokia and Samsung. A new size was recently released, called RS-MMC, which stands for Reduced Size MMC and is a smaller MMC card. It can fit the original MMC slot by the use of an adapter.

Figure 4: MultiMediaCard (MMC).

Figure 5: RS-MMC card.

Recently a new standard called MultiMediaCard Plus (a.k.a. MMC+, MMC Plus or MMC 4.0) was released, providing a higher speed rate.

Main Specs

• Available Capacities (MMC): 32 MB, 64 MB and 128 MB
• Available Capacities (RS-MMC): 128 MB, 256 MB and 512 MB
• Available Capacities (MMC+): 256 MB, 512 MB and 1 GB
• Read speed (MMC and RS-MMC): 2 MB/s
• Read speed (MMC+): 11 MB/s
• Write speed (MMC): 1 MB/s
• Write speed (RS-MMC): 2 MB/s
• Write speed (MMC+): 7 MB/s
• Voltage: 2.7 V to 3.6 V
• Power Consumption: < 33mA (read), < 35mA (write) and < 50µA (standby)
• Length (MMC): 1.26 in (32 mm)
• Length (RS-MMC): 0.71 in (18 mm)
• Width: 0.94 in (24 mm)
• Height: 0.05 in (1.4 mm)
• Weight: 0.05 oz max (1.5 g max)
• Operating temperature: -25º C to 85º C (-13º F to 185º F)
• Storage  temperature: -40º C to 85º C (-40º F to 185º F)
• Shock: 1000G max 
• Vibration: 15G peak-to-peak max
• Humidity: 8% to 95%
• For more information: http://www.mmca.org/