Bus Signal Levels - SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Product Manual

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).
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.
Parameter
Output HIGH voltage
Output LOW voltage
Input HIGH voltage
Input LOW voltage
SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
Figure 3-6. Bus Signal Levels
Table 3-6. Input and Output Voltages
Symbol Min.
VOH
0.75 VDD
VOL
0.125 VDD
VIH VDD + 0.3
0.625 VDD
VIL VSS-0.3
0.25 VDD
SD Card Interface Description
Max. Unit Conditions
V
IOH=-100 A
@V (min.)
DD
V
IOL=100 A
@V (min.)
DD
V
V
3-9