Transcend Information TS1~2GUSD-S3 - Manual (Page 4)

T T T S S S 1 1 1 ~ ~ ~ 2 2 2 G G G U U U S
S S D
D D -
- - S
S S 3
3 3
microSD Memory Card + Reader S3
Transcend Information Inc. 4
• Bus Signal Levels
As the bus can be supplied with a variable supply voltage, all signal levels are related to the supply voltage.
To meet the requirements of the JEDEC specification JESD8-1A, the card input and output voltages shall be within the
following specified ranges for any V
DD
of the allowed voltage range:
Parameter Symbol Min. Max. Unit Remark
Output HIGH voltage V
OH
0.75* V
DD
V I
OH
= -100 μA @V
DD
min
Output LOW voltage V
OL
0.125* V
DD
V I
OL
= 100 μA @V
DD
min
Input HIGH voltage V
IH
0.625* V
DD
V
DD
+ 0.3 V
Input LOW voltage V
IL
V
SS
– 0.3 0.25* V
DD
V