ESMMC64 Datasheet, PDF (4/8 Pages) Eorex Corporation – 64MB/128MB/256MB/512MB MultiMediaCard™

64MB/128MB/256MB/512MB MultiMediaCard^TM
Temperature Characteristic
Parameter
Min
Storage temperature
-40
Operating temperature
-25
Junction temperature
-20
Max
85
85
95
Unit
℃
℃
℃
Electrical Characteristics
1. Absolute Maximum Ratings
Parameter
Supply voltage
Total power dissipation
ESD protection
Input voltage
Output voltage
High-level output current
Low-level output current
Symbol
Vcc
VImax
VOmax
VOHmax
IOHmax
Min
-0.5
-4
-0.5
-0.5
-100
Max Unit
Remark
4.6
V
0.2
W
4
KV Human body model
Vcc+0.5 V ≦max(Vcc)
Vcc+0.5 V ≦max(Vcc)
mA Short cut protected
150 mA Short cut protected
2. Bus Signal Line Load
The total capacitance CL of each line of the MultiMediaCard^TM 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 Min
Pull-up resistance for CMD
RCMD 4.7
Pull-up resistance for DAT
RDAT
50
Bus signal line capacitance
CL
Bus signal line capacitance
CL
Signal card capacitance
CCARD
Maximum signal line inductance
Eorex Corporation
www.eorex.com
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Max Unit
Remark
100
KΩ To prevent bus floating
100
KΩ To prevent bus floating
250
pF fpp≦5MHz, 30 cards
100
pF fpp≦20MHz, 10 cards
7
pF
16
nH fpp≦20MHz