TM
64MB/128MB/256MB/512MB MultiMediaCard
Temperature Characteristic
Parameter
Storage temperature
Operating temperature
Junction temperature
Min
-40
-25
-20
Max
Unit
℃
85
85
95
℃
℃
Electrical Characteristics
1. Absolute Maximum Ratings
Parameter
Supply voltage
Symbol
Vcc
Min
-0.5
Max
4.6
0.2
4
Unit
V
Remark
Total power dissipation
ESD protection
W
-4
KV
V
Human body model
≦max(Vcc)
Vcc+0.5
Vcc+0.5
Input voltage
VImax
VOmax
VOHmax
IOHmax
-0.5
-0.5
-100
≦max(Vcc)
Output voltage
V
High-level output current
Low-level output current
mA
mA
Short cut protected
Short cut protected
150
2. Bus Signal Line Load
TM
The total capacitance CL of each line of the MultiMediaCard bus is the sum of the bus
master capacitance CHOST, the bus capacitance CBUS itself and the capacitance CCARD of
each card connected to this line:
CL = CHOST + CBUS + N*CCARD
Where N is the number of connected cards. Requiring the sum of the host and bus
capacitance’s not to exceed 30pF for up to 10 cards, and 40pF up to 30 cards, the following
values must not be exceeded:
Parameter
Symbol
RCMD
RDAT
CL
Min
4.7
50
Max
100
100
250
100
7
Unit
KΩ
KΩ
pF
Remark
Pull-up resistance for CMD
Pull-up resistance for DAT
Bus signal line capacitance
Bus signal line capacitance
Signal card capacitance
To prevent bus floating
To prevent bus floating
fpp≦5MHz, 30 cards
fpp≦20MHz, 10 cards
CL
pF
CCARD
pF
fpp≦20MHz
Maximum signal line inductance
16
nH
Eorex Corporation
www.eorex.com
4/8
EOREX [ EOREX CORPORATION ]
