User's Manual

SIM800 Document
- 6 -
I
IH
High-level input current
2.1
-
3.1
V
I
IL
Low-level input current
-0.3
-
0.7
V
V
OH
High-level input voltage
2.4
-
-
V
V
OL
Low-level input voltage
-
-
0.4
V
* These parameters are for digital interface pins, such as keypad, GPIO, I
2
C, UART, LCD, PWMs and DEBUG.
3.3. SIM Card Interface Characteristics
Table 3: SIM card interface characteristics
Symbol
Parameter
Min
Typ
Max
Unit
I
IH
High-level input current
-1
-
1
uA
I
IL
Low-level input current
-1
-
1
uA
V
IH
High-level input voltage
1.4
-
-
V
2.4
-
-
V
V
IL
Low-level input voltage
-
-
0.27
V
0.4
V
V
OH
High-level output voltage
1.62
-
-
V
2.7
-
-
V
V
OL
Low-level output voltage
-
-
0.36
V
-
-
0.4
V
3.4. SIM_VDD Characteristics
Table 4: SIM_VDD characteristics
Symbol
Parameter
Min
Typ
Max
Unit
V
O
Output voltage
2.70
2.80
2.90
V
I
O
Output current
-
-
50
mA
3.5. VRTC Characteristics
Table 5: VRTC characteristics
Symbol
Parameter
Min
Typ
Max
Unit
V
RTC-IN
VRTC input voltage
2.8
V
I
RTC-IN
VRTC input current
-
3
-
uA
V
RTC-OUT
VRTC output voltage
-
2.8
-
V
I
RTC-OUT
VRTC output current
-
2
mA