Encontré algunos datos de memorias, son típicos y quizas haya que ver en particular cual es tu caso.
Fuente:
Memory Cards TutorialMMC 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/SD Available Capacities: 32 MB, 64 MB, 128 MB, 256 MB, 512 MB and 1 GB
Voltage: 2.7 V to 3.6 V
Power Consumption: < 33mA (read), < 35mA (write) and 100µA (standby)
Read speed: 12 MB/s
Write speed: 1x = 150 KB/s, 32x = 4.8 MB/s, 40x = 6.0 MB/s
Length (SD): 1.26 in (32 mm)
Width (SD): 0.94 in (24 mm)
Height (SD): 0.082 in (2.1 mm)
Weight (SD): 0.070 oz max (2 g max)
Length (MiniSD): 0.85 in (21.5 mm)
Width (MiniSD): 0.79 in (20 mm)
Height (MiniSD): 0.055 in (1.4 mm)
Weight (MiniSD): 0.035 oz max (1 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.sdcard.org