Smart Machine Smart Decision
SIM800C_Hardware_Design_V1.02
4
2015-4-27
4.8.2. SIM Card Design Guide...................................................................................................................... 32
4.8.3. Design
Considerations for SIM Card Holder ...................................................................................... 32
4.9.
ADC ....................................................................................................................................34
4.10.
Network Status Indication...................................................................................................35
4.10.1. NETLIGHT
Multiplexing Function................................................................................................. 35
4.11.
Operating Status Indication.................................................................................................36
4.11.1.
STATUS Multiplexing Function ...................................................................................................... 36
4.12.
RF Synchronization Signal .................................................................................................36
4.12.1. RF_SYNC
Multiplexing Function................................................................................................... 36
4.13.
Antenna Interface................................................................................................................37
4.13.1 GSM
Antenna
Interface ................................................................................................................... 37
4.13.2 Bluetooth
Antenna
Interface ............................................................................................................ 38
5.
PCB Layout ........................................................................................................ 39
5.1
Pin Assignment ...................................................................................................................39
5.2
Principle of PCB Layout .....................................................................................................39
5.2.1 Antenna
Interface ................................................................................................................................ 40
5.2.2 Power Supply ...................................................................................................................................... 40
5.2.3 SIM
Card Interface.............................................................................................................................. 40
5.2.4 Audio
Interface.................................................................................................................................... 40
5.2.5 Others .................................................................................................................................................. 40
6.
Electrical, Reliability and Radio Characteristics ........................................... 41
6.1
Absolute Maximum Ratings ...............................................................................................41
6.2
Recommended Operating Conditions .................................................................................41
6.3
Digital Interface Characteristics..........................................................................................41
6.4
SIM Card Interface Characteristics.....................................................................................41
6.5
SIM_VDD Characteristics ..................................................................................................42
6.6
VDD_EXT Characteristics .................................................................................................42
6.7
VRTC Characteristics .........................................................................................................42
6.8
Current Consumption (VBAT=4.0V) .................................................................................42
6.9
Electro-Static Discharge .....................................................................................................43
6.10
Radio Characteristics ..........................................................................................................44
6.10.1
Module RF Output Power................................................................................................................ 44
6.10.2
Module RF Receive Sensitivity ....................................................................................................... 45
6.10.3
Module Operating Frequencies........................................................................................................ 45
7.
Manufacturing ................................................................................................... 46
7.1.
Top and Bottom View of SIM800C....................................................................................46
7.2.
Typical Solder Reflow Profile ............................................................................................46
7.3.
The Moisture Sensitivity Level...........................................................................................47
7.4.
Baking Requirements..........................................................................................................47
8.
Appendix............................................................................................................. 48
I.
Related Documents .............................................................................................................48
II.
Multiplexing Function.........................................................................................................49
