Product manual

Industrial Grade SD Card Interface Description
SanDisk Industrial Grade SD Product Manual, Rev. 1.0 © 2003 SANDISK CORPORATION -3-9
Maximum signal line inductance 16 nH f
PP
≤ 20 MHz
Pull-up resistance inside card (pin 1) R
DAT3
10 90
kΩ
May be used for card detection
3.4.4. Bus Signal Levels
As the bus can be supplied with a variable supply voltage, all signal levels are related to the supply voltage (see
Figure 3-6).
Figure 3-6. Bus Signal Levels
To meet the requirements of the JEDEC specification JESD8-1A, the card input and output voltages shall be within
the specified ranges in Table 3-6 for any VDD of the allowed voltage range.
Table 3-6. Input and Output Voltages
Parameter Symbol Min. Max. Unit Conditions
Output HIGH voltage VOH
0.75∗VDD
V
IOH=-100 µA
@V
DD
(min.)
Output LOW voltage VOL
0.125∗VDD
V
IOL=100 µA
@V
DD
(min.)
Input HIGH voltage VIH
0.625∗VDD
VDD + 0.3 V
Input LOW voltage VIL VSS-0.3
0.25∗VDD
V