ESMMC64 Datasheet, PDF (5/8 Pages) Eorex Corporation – 64MB/128MB/256MB/512MB MultiMediaCard™

64MB/128MB/256MB/512MB MultiMediaCard^TM
3. Recommend Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Remark
Supply voltage
VCC
2.7
3.0
3.6
V
Inputs Low-level input current
VIL
VSS-0.3
0.25VCC V
High-level input current
VIH 0.625VCC
VCC+0.3 V
Outputs High-level output current
IOH
-2
mA
Low-level output current
IOL
6
mA
Clock Clock frequency data
fpp
0
20
MHz CL<100pF,(10 cards)
transfer mode (pp)
Input clk Clock frequency ident.
fOD
0
400
KHz
Mode (od)
Clock cycle time data
Tpp =
50
ns
transfer mode (pp)
1/fpp
Clock cycle time ident.
tOD =
2.5
µs
Mode (od)
1/fOD
Clock low time
tWL
10
ns CL<100pF,(10 cards)
Clock high time
tWH
10
ns CL<100pF,(10 cards)
Clock input rise time
tLH
10
ns CL<100pF,(10 cards)
Clock input fall time
tHL
10
ns CL<100pF,(10 cards)
Clock low time
tWL
50
ns CL<250pF,(30 cards)
Clock high time
tWH
50
mA CL<250pF,(30 cards)
Clock input rise time
tLH
50
mA CL<250pF,(30 cards)
Clock input fall time
tHL
50
MHz CL<250pF,(30 cards)
4. Recommend Bus Conditions
Parameter
Symbol Min Typ Max Unit
Remark
Clock Pull-up resistance for CMD
RCMD 4.7
100 KΩ To prevent bus floating
Input clk Pull-up resistance for DAT
RDAT 50
100 KΩ To prevent bus floating
Bus signal line capacitance
CL
250 pF fpp≦5MHz, 30 cards
100 pF fpp≦20MHz, 10 cards
Maximum signal line inductance
16
nH fpp≦20MHz
Eorex Corporation
www.eorex.com
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